What size bolts for climbing holds. Please email info@tensionclimbing.
What size bolts for climbing holds. Choose the setup you want for your MoonBoard, for example the 2016 or 2017 setup, and buy the hold sets for that setup. Our Alloy Steel bolts are crafted through an advanced Cold-Forging process to deliver unmatched durability and strength, making them ideal for any climbing setup. These bulk holds will help you add the new climbing hold variety your routesetters and customers are demanding or build your own wall at home. Screws included. Nov 22, 2021 · What bolts to use for climbing holds? The ideal climbing bolt size is a 3/8-16 Allan head bolt into a 3/8-16 t-nut. Alternatively, you can choose 2 or 3 of these colours to create a layered effect. US Standard 3/8" bolts for MoonBoard holds. ALL AGES- Great for kids and adults! Excellent for all day training. Otherwise you risk to destroy the hole Strong and Durable Climbing Holds: Made of high quality plastic resin, weather resistant and won't crack or fade, textured foot and hand grips make it easier for kids to grip and climb up Get Your Kids Active: Comes in 10 pastel colors and feature multi size and shapes for building a unique rock wall to encourage children to be active, exercise kids’ strength, balance, agility, flexibility Jan 24, 2024 · What size bolts do climbing holds use? These holds attach to your climbing wall with a 3/8 inch bolt which screws into a t-nut and is the most common method for mounting climbing holds. How was silence bolted? Nov 22, 2021 · What size are climbing wall t-nuts? T-Nuts. Sourcing bolts for you is a simple way we can reduce your gym cost and keep more money in your hold budget! All bolts come threaded with 1. DURABLE high All Metolius climbing holds feature the following: Strong, flexible Resin to resist breakage Steel washers in all bolt-on holds for increased strength and durability Bolt-on holds, except the Micro, have a wire insert to help keep them intact in the event of breakage (TUV 3. 5". Especially is the hold is large. Nov 21, 2016 · Amazon. Atomik 3/8 x 2 inch Long Alloy Steel Bolts 50 Pack Durable Hardware for Rock Climbing Holds 3/8-16 Socket Head Allen Bolt Designed for Indoor Use Wall Supplies All the hardware you need for your climbing wall. 5. Using the wrong one will damage the hold hole after being tightened a few times. Item Weight: 0. If this area is not loaded in the correct place or unevenly due to the wrong type of bolt, the hold may break in this very place. Learn about materials, mounting techniques, and strategic placement to enhance your climbing experience safely. Perfect for attaching holds to any climbing wall, ensuring safety and stability. Size: As shown in the image. These bolts are manufactured with a unique Cold-Forging technique that results 4 Prong Zinc plated M10 T nut. com —it is a critical community service. The standard 3/8" diameter socket head bolts are specifically designed to ensure a firm hold, requiring a 5/16" hex wrench for easy installation. We recommend using non-self drilling timber screws with head size of 8G/10G x 30mm to 60mm. This keeps the bolt in place (doesn’t spin), and it’s still easier to change positions compared to the screw-on holds with their 4-5 screws. Nov 16, 2013 · 25 Steel Bolts 2" bolts fit most medium and small climbing holds. Hex-heads are used to fasten bolts to Dec 16, 2019 · Strong and Durable Climbing Holds: Made of high quality plastic resin, weather resistant and won't crack or fade, textured foot and hand grips make it easier for kids to grip and climb up Get Your Kids Active: Comes in 10 bright colors and feature multi size and shapes for building a unique rock wall to encourage children to be active, exercise kids’ strength, balance, agility, flexibility Drilling Holes for Your Climbing Wall Have you decided what pattern you want? For most home woodies (walls), a 5"x5" or 6"x6" pattern works great. These are top quality t-nuts! Oct 2, 2013 · 250 T-Nuts for Climbing Holds $3199 + Atomik 3/8 x 2 inch Long Alloy Steel Bolts 50 Pack Durable Hardware for Rock Climbing Holds 3/8-16 Socket Head Allen Bolt Designed for Indoor Use Wall Supplies $2823 Total price: $00 Add all 3 to Cart Aug 30, 2021 · Many climbing areas and climbing websites also have systems in place for reporting suspect bolts and hangers. The 3/16" diameter hole prevents the holds from spinning. 5", 2", and 2. The Kilter holds will come with 3/8" bolts if you choose to include them. My recommendation, drill more holes than you think you will need, it will give you more options for climbing movement down the road. We also offer Mixed Sets of holds from across our ranges and including several hold types, perfect for home walls. com : 100 T-Nuts for Climbing Holds : Rock Climbing T Nuts : Sports & OutdoorsA pack of our premium climbing wall t-nuts suitable for indoor and outdoor use. Bolt When you choose a proper bolt for the fixation of the hold be sure the bolt`s length is enough to go through the T-nut. However, for metric users, there is also the M10. This is because it is the most common bolt used in climbing gyms, and therefore there are many more compatible climbing holds that fit these dimensions. Online shopping from a great selection of climbing holds in the Outdoor Recreation store on Amazon. Mar 15, 2017 · Hi all. Screw-on holds are screwed on from the front of the wall, and cannot be moved around on the wall without leaving screw holes. Bolt on holds Each hold includes a built-in washer (for strength), Moon Climbing logo, number and orientation marks to enable replication of our problems on any MoonBoard, anywhere in the world Designed to complement the 40-degree and 25-degree MoonBoard. For example, French climbers in the Verdon Gorge began establishing routes from the top down while on rappel. Jun 28, 2023 · Later, in the 1970s and 80s (1), climbers began using bolts in a new way– for sport climbing. Our climbing holds are great for both kid climbers and adult climbers. Hammer them in before you put your wall up. Here are our in-depth reviews! Driftless Climbing Bolts for Rock Climbing Holds-Indoor 3/8-16 Socket Cap Screw (2. The bolts are A climbing hold is a shaped grip that is usually attached to a climbing wall so climbers can grab or step on it. DOES NOT INCLUDE ALLEN WRENCH If you choose with hardware your package will also include 25x 3/8th diameter16 Pitch Thread T Nuts 25x 3/8th diameter 1. They stay captive in the wood once they've been hammered in. We make fun, engaging, and affordable rock climbing holds for your home climbing wall. S. Screws Use only screws with 4,5 mm or 5 mm thickness. T-nuts provide a grid work of female threads so you can easily bolt your modular holds on a climbing wall surface. Side note, if you’re using an impact driver make sure to have Our bolt-on climbing wall holds feature high-quality craftsmanship for durability, a variety of shapes and sizes for enhanced wall appeal, meticulous attention to safety with safe grip textures, and easy installation for quick setup. Our Bolt on Climbing Holds come in a variety of 250 different shapes and range from the size of a golf ball to a baseball. 0 inch) 33 $1845 FREE delivery Jun 12 - 17 Bolts Bolts and t-nuts are not included with your hold set. Using an Allen wrench (included), gently start threading the bolt into the t-nut. Price and other details may vary based on product size and color. ) Assuming you are going the bolt and nut route, know that not all t-nuts are made the same. Ocelot Grips focuses on everything done with intention, from holds we shape to the quality of our products and our customer care. Otherwise, choose your own pattern. Available in 2, 2. Please note, you should leave about ¾ of an inch of bolt thread beyond the bottom face of your climbing hold. 5, 3, and 3. Different types and sizes of Rock and Wall Climbing Holds. 5" of thread. 5 369 ratings $11999 May 2, 2010 · Amazon. These steel T-nuts are ideal for high-traffic walls and commercial climbing facilities. They are designed to securely hold climbing grips, ensuring they stay firmly in place. Mar 29, 2024 · Package: 50 x Bolts for Rock Climbing Holds. Always pin a hold fixed in this manner, as the friction alone isn’t enough to stop rotation. When you buy bolts, check if your holds need a tapered or flat seated bolt. Climbing Holds Anchor Set - 3PCS - Stainless Steel Bolt Hanger and Bolt Heavy Duty Climbing Holds Weight 2500KG for Indoor Outdoor Climb Train 10 $1799 Save 5% with coupon (some sizes/colors) Q: What is the difference between a screw-on and bolt-on hold? A: Bolt-on holds require a t-nut on the back of the wall, and can be moved interchangeably between holes. These are hammered in to the back of your wall, so the bolt can go through the hold and 18mm of plywood, into the imbedded T nut. Material: Steel with high carbon content. The hardware included are 3/8th T nuts and 3/8th 1. Driftless Climbing Bolts for Rock Climbing Holds-Indoor 3/8-16 Socket Cap Screw (3. These holds have minor surface blemishes and are a random combination of shapes, styles, and sizes. com: Driftless Climbing Bolts for Rock Climbing Holds-Indoor 3/8-16 Socket Cap Screw (1. After a while, this practice gained popularity (and legitimacy) in the United States. Ideal for t-nuts, these bolts ensure long-lasting performance Jun 11, 2024 · Discover the world of rock climbing wall holds, from types of holds to installation tips. How To Attach Rock Climbing Holds Attaching Bolt-on Climbing Holds Let's start with what NOT to do don't tighten as hard as you can! Over-tightening can quite literally break, or at least damage, your new climbing holds. As far back as the 1980's, we saw the need for indoor alternatives to escape the cold, harsh winters or the hot, humid summers. Dec 5, 2021 · 2-bolt Climbing Holds share a similar design to bolt-on holds with the added benefit of two 3/-16 Allen Head Socket Cap Bolts instead of one. Most holds have the right length of bolt in the description, the one we recommend are for fixing through 18mm plywood. These bolt-on holds are designed to be attached to 3/4" plywood or thicker material with stainless steel bolts and 40 holds Polyester material which will retain its fiction and texture even after many years of heavy use. Sep 26, 2020 · 5 of the best climbing hold sets for home walls in 2025 from top brands like Metolius. Here are factors to consider when choosing holds, and a recommended starter set. Amazon. If you buy holds that are bolt-on, they will use 3/8" bolts. For Bolt on Holds On the back of the Plywood put a t nut in each hole. Original School Holds: 50 pcs M10 x 60mm Installation Advice Do not use an impact driver to install your holds If a bolt-on hold has a screw hole on it we recommending pinning the hold with a small screw (approximate diameter size 4mm or 5mm). 3/8", 4-prong, zinc-plated Available in quantities of 25 or 100 Buy XL Ring 1-1/2 inch (Bolt-on) online conveniently on Atomik Climbing Holds. These bolts are the industry standard for indoor rock climbing holds. We recommend the use of screws without ribs on the back side of the screw head. They are made of a single piece of metal with a hexagonal cross-section. High-quality bolts, like these, will get you the longest life out of your t-nuts on your home climbing wall. All shapes with aluminum insert are suitable for both countersunk bolts and socket head bolts. To place t-nuts, 7/16 inch diameter holes are drilled throughout a plywood sheet Discover the 5 best climbing holds for your indoor wall—from jugs to crimps to slopers. COMES IN MULTIPLE COLORS- choice of multiple colors. Please email info@tensionclimbing. Sep 30, 2013 · This item: Escape Climbing 100 Pack Screw-In T-Nuts | Durable Steel Hardware for Rock Climbing Holds | Easy Installation with Screws Included These bolt-on holds securely attach to plywood, 1" or 1. We recommend using non-self Sep 26, 2022 · In reply to Tyler: I think I used 12mm and it was a tight hammer in fit. Bolts can be purchased separately here. Bulk Loose Holds by the pound - clearance at $11/pound. In 3/8″-16 Black Oxide Bolt – Standard bolt size needed for climbing holds. This is where screw on holds come into their own. 06lbs This product is a set of 50 strong and durable bolts made from high-carbon steel, perfect for setting up or repairing rock climbing walls at home. Bolt on Holds: Your package should include holds with one hole in them. com. 5 inch)There’s nothing better for indoor use than Alloy Steel. Take the time to report any such bolts you encounter to your local climber organization, on Mountain Project, or at badbolts. Ocelot has over 700 holds, large families that coordinate together. $56. Bolt-on bolts are the most common type of climbing holds. ProVolumes Nuts for T-nuts If you plan on putting holds on your volumes than you are going to need t-nuts. 77 Atomik 3/8 x 2 inch Long Alloy Steel Bolts 50 Pack Durable Hardware for Rock Climbing Holds 3/8-16 Socket Head Allen Bolt Designed for Indoor Use Wall Supplies $28. 18 1000 T-nuts for Climbing Holds $89. We will walk you through our line of climbing holds and work with you to find the best fit for your facility. WEATHERPROOF- may be used indoors or outdoors. com: climbing hold boltsCheck each product page for other buying options. com if you have any questions. T-nuts can be made from different materials, some cheaper than others. Buy the t-nuts first, measure then start drilling. Keep in mind, the t-nuts are a significant part of your Secure your climbing holds with confidence using our high-quality bolts, available in Black Oxide Steel for indoor use. The most common bolt size for climbing holds is 3/8 inch (9. - Made from cold-forged alloy steel See full list on natureclimbing. 50PCS 3/8x2 inch Long Bolts for Wall Rock Climbing Holds Mounts, 3/8-16 Socket Head Allen Cap, Alloy Steel Durable & Easy Hanger Hardware Ice Screws, Gear Kit Bundle Supplies Designed for Indoor Use Standard bolts for climbing holds. Assuming that you're using 18mm ply and m10 T-nuts, is there a "standard" length for the bolts you need to secure resin holds, or does it vary by manufacturer/style of hold? TIA. 0288kg / 0. TOPNEW 32 Rock Climbing Holds Multi Size for Kids, Adult Rock Wall Holds Climbing Rock Wall Grips for Indoor and Outdoor Playground Play Set - Includes 2 Inch Mounting Hardware 1,107 1K+ bought in past month $4699 These sockets can be installed into a solid wall (brick, concrete or stone) using resin and provide a strong, permanent anchor for your holds. Vertical Solution's standard use screw-in T-nuts. Our Holds We offer a broad range of hold types, in 8 unique styles. Our SCREW-ON HOLDS have at least two holes of diameter 3/16". 5 inch) 29 $1598 FREE delivery Fri, Jan 24 on $35 of items shipped by Amazon May 1, 2010 · A 250 pack of our premium climbing wall t-nuts suitable for indoor and outdoor use. There’s nothing better for indoor use than Alloy Steel. 23 6% 100 Large Rock Climbing Holds with Hardware (100 Bolts and 100 T-Nuts) The typical bolt used for climbing is a torque-controlled wedge bolt (otherwise referred to as a bolt-in) that consists of a threaded bolt shaft with a single or double conical end wrapped in a clip and a hanger placed over the end of the bolt shaft where it protrudes from the rock. 5 inch bolts are good for small holds, 2 inch bolts Here's our top pick of the 7 best climbing hold bolts to build your own DIY indoor or outdoor rock climbing wall at home or for a new climbing gym venture. Manufactured using advanced Cold-Forging techniques for enhanced strength and fatigue resistance. 3/8 inch diameter, 4 prong, zinc plated. Experience unparalleled durability with our Alloy Steel bolts, perfect for indoor applications. Total Length: 75mm, Diameter: 16mm, Internal Thread Length: 30mm, Drill Size: 20mm. They placed bolts in otherwise “unprotectable” rock to create fully bolted sport climbs. When you pick bolts for your holds you should keep in mind your panel width and the holds' size. Aug 1, 2019 · Amazon. It’s probably also worth pointing out that although all our holds are of absolutely the highest quality using holds outside does decrease their life compared to inside. Jul 11, 2020 · What bolts for climbing a wall? The ideal climbing bolt size is a 3/8-16 Allan head bolt into a 3/8-16 t-nut. Our t-nuts are made from all new steel, not recycled materials as commonly found in low cost t-nuts. 75-inch Alloy Socket Cap Allen Head Bolts. Bolts and t-nuts not included 40 bolt-on hand hold Great prices on world-class polyurethane rock climbing holds, T-nuts, hardware, and accessories. (The exception is if you screw it, with screw on holds. Take care not to cross-thread the T-nut. 50 bolt-on polyurethane holds Each hold includes a built-in washer (for strength), Moon Climbing logo, number and orientation marks to enable replication of our problems on any MoonBoard, anywhere in the world Designed to compliment the 40-degree and 25-degree MoonBoard. Escape Climbing 34 Bolt Variety Pack | Features a 3/8-16 Socket Cap Screw | Includes 2” 3” 4” and 5” Bolts | Designed Specifically for Rock Climbing Walls and Holds 2 $2499 $4. What are climbing bolts called? Climbing wall tech - t-nuts The standard climbing wall t-nut is coarse thread 3/8 inch diameter. We stock everything from jugs and crimps to slopers and pinches, ideal for customising your setup. The following torque settings are recommended for fixing the holds to an even, untreated and flat 18mm plywood surface using M10 Bolts (hold sets listed below are for size reference): At the area just around the bolt in particular, climbing holds are subject to considerable strain. 50 Large Kids Bolt on Rock Climbing Holds with Hardware. Use the correct size drill bit for the bolt. 3/8" - 16 t-nuts are the standard size used in the U. 5 inch bolts are good for small holds, 2 inch bolts for medium holds, and 3 inch bolts for larger holds. 75 length inch Black Oxide Alloy Steel Socket Cap Bolts Shop for Climbing Holds at MEC. All home Jan 3, 2024 · The recommended drill bit size for bolting on rock holds for indoor climbing walls is typically determined by the diameter of the bolts being used. Available in 3, 4 or 6 prong - more prongs are better for OSB but more difficult to place in plywood. High Quality Climbing Holds for training and campus board. These bolts are manufactured with a unique Cold-Forging technique that results in greater strength, higher fatigue resistance, and threads that last! Using high-quality bolts is critical if you want to get the longest life possible out What do I need? Before you start building your wall, make sure you have assembled all of the following Lumber Drill 7/16” drill bit Hammer Allen wrench T-Nuts Climbing holds Bolts What should I build the wall out of? Use one of the following recommended materials for do-it-yourself climbing walls: Indoor ¾” untreated plywood Outdoor ¾” treated plywood 2” x 6” pressure treated On a traditional plywood climbing wall, t-nuts are used to attach bolt-on climbing holds to the wall. Approx weight: 9. Please note that our US standard 3/8" bolts will not work with an M10 T-nuts. 3/8 inch diameter – 16 threads per inch. If you are buying Kilter holds to make a Kilter board, you should use the hole pattern recommended by Kilter. Residential Climbing Holds Set up your home wall or woody with our wide range of climbing holds—perfect for training, building strength, or just having fun. Then just pin them at the side with a smaller screw so they don’t rotate. Bolts for indoor climbing holds. Insert the bolt through the hand hold and into the climbing wall. 99 Nov 22, 2021 · How long should bolts be for climbing holds? Different climbing holds require different bolt lengths. Learn how these essential components create challenging routes for climbers of all skill levels and bring the outdoor climbing experience indoors. 25 t-nuts per square foot of climbing surface. This helps in several ways, from routesetting, to route sharing, to logging your progress. com : Small Holds Climbing Pack of 10 Bolt-on Holds of Foot and Crimp Size (Black) : Sports & OutdoorsGREAT FOR ALL CLIMBING LEVELS- mix of hold designs great for feet and hand holds with a great texture. The Bolt on Holds are meant to go in 3/4th inch thick plywood. com Use bolts of at least 3/8” x 2 1/4” length in the best rock, with increasing size and length as rock quality decreases and anticipated climber use increases. You can purchase these holds with or without hardware. Please select your hold set from the drop down menu to receive the appropriate imperial bolt kit for your MoonBoard holds. Here . Buy Large Ring 1-1/4 inch (Bolt-On) online conveniently on Atomik Climbing Holds. These holds have one hole and are designed to be used with 3/4 inch plywood. They have different lengths, all of them have a 10 mm diameter and a pitch of 1 mm. We would like to show you a description here but the site won’t allow us. Each set of holds, and our volumes, are available in 19 different colours. I think you'll struggle to find any holds that aren't m10. Made in The U. Commercial grade T-Nut. Its easy to put them in before you build Design and Sale of Climbing Holds. In this article, “Climbing Holds 101: Types of Climbing Holds,” we delve into the intricacies of some fundamental hold types, shedding light on their characteristics, difficulty levels, and optimal uses. The more holes, the more climbing options but the downside is increased cost up-front to buy the t-nuts. Get inspired gear, informed advice, 100s of brands – all backed by our Rocksolid Guarantee. Hollow-back holds, which are partially hollow on the inside and are considered more "premium" ho Mar 21, 2022 · You don't need a Planet Granite–sized budget to set your modest woodie. 5 mm) or 10mm. You need to drill a 13mm hole to fit these Its always best to buy more than you need. All climbing holds and chalk bags are made in Springfield, MO. Jul 18, 2012 · The image above shows a cross section of how a bolt on climbing hold is normally used in conjunction with a plywood wall or 'board'. The hardware we choose is 2 inch bolts and 3/8th inch T Nuts. Whether you're setting up a climbing wall at home or at a gym, our bolts provide the reliability you need for a safe and enduring climbing experience. 2 compliant) Passing the savings to you. Imported by Escape Climbing guaranteeing the highest quality bolts Report an issue with this product or seller Alternatively, you can buy all the individual MoonBoard components (holds, LED System, bolts and t-nuts), without the panels. We recommend 2. We recommend numbering the panels in ascending order and lettering the vertical columns across the shroud from left to right. Intermediate to Advanced climbing 25 Bolt on Climbing Hold Packs include Rocky Mountain Climbing Gear Holds Comes with the option to buy hardware or purchase without hardware. Requires 5/16″ hex “big bit” Most of our BOLT-ON HOLDS have 2 holes: The 10mm diameter hole is for fixing the hold into a standard 3/8" t-nut and requires 3/8" bolts of varying lengths. T-nuts are like a nut for a bolt, that is attached to the back of the wall permanently. Intermediate to Advanced climbing. Indoor climbing involves mastering a diverse array of holds, each presenting its own set of challenges and demands. They are simply attached with wood screws. Nov 22, 2021 · What length bolts for climbing holds are good? Different climbing holds require different bolt lengths. But some times there are places where traditional bolt-on holds cannot be placed. As the name suggests, the Original School Holds were the first hold set created for the MoonBoard. Q: Can I use your climbing holds outside? Metolius was the first company to bring indoor climbing and training products to North America. Our current lead time for bolts is about 2 weeks. We recommend drilling a hole that 7/16th inch into the back of the plywood. These climbing holds attach to your climbing wall with a 3/8 inch bolt which screws into a t-nut and is the most common method for mounting climbing holds. The standard 3/8" diameter socket head bolts are specifically designed to ensure a firm hold, requiring a 5/16 You can buy special washers to fit inside standard T-Nut bolt holes within climbing holds that allow them to take a screw. I'm planning on 3D printing some climbing holds for my local gym but i need to know the screw / hole dimensions, both the big bolts and the smaller wood screws. - Bolts are 3/8" x 16 (thread count) - Socket head = 5/16" - 3 Sizes available; 1. 49 delivery Wed, May 7 We import the highest quality climbing bolts by the semi load giving you the absolute best price possible. POWERTEC 3/8"-16 T Nuts 50 Pcs, 4 Pronged Tee Nuts for Bolts and Stem Caster Wheels, Threaded Inserts for Wood Working, Rock Climbing Holds and Furniture, for Use with Hammer | 7/16" Length (QTN1115) $9. We are a trusted name in climbing holds, ninja warrior products and more. A Brand: Rocky Mountain Climbing Gear 4. Add unique climbing holds to your climbing wall to make it fun and educational. Comprising of 40 hand holds and the required 10 standard MoonBoard Footholds, these unforgiving crimps and pinches will make your MoonBoard a lean, mean training machine. For the white and black moonboard holds some have a small hole to set the hold to ensure they dont spin but what size screw do i use? Is it alright if its smaller in diameter as long as it reaches past the panel? Nov 9, 2022 · Place hand hold over the desired hole (t-nut) in the climbing wall, lining up the hand hold with the hole in the climbing wall. T-Nuts are placed on the backside of the climbing wall and used for attaching bolt-on climbing holds with a 3/8″ bolt. Secure your climbing holds with high-quality steel socket head bolts. Feb 22, 2024 · We are a climbing holds company created and designed by route-setters. 3kg Box size: 38 x 28 x 23cm Country of Origin: Bulgaria Bolts Bolts and Making their presence known, the XL Dinosaur Climbing Holds are truly Jurassic in size! These colossal bolt-on climbing holds give kids a chance to hang from a Brontosaurus or soar with a Pterodactyl. A nut and washer secure the hanger. 5 inch lengths. Make sure you have the correct size wrenches for setting, the majority of hold bolts require a 5/16 Allen wrench while some footholds require a 7/32 wrench for taper bolts. We also have climbing hold mega packs to bulk out your board without blowing the budget. Climbing holds can either be bolted to a wall with existing bolts or they can be bolted directly to the wall. 5" boards, and with t-nuts allow for easy rotating and re-arrangement! 15 holds is a great amount for a smaller 4x6 wall, or a larger wall size for a bit more of a challenge with older kids. Screw on holds Generally most climbing holds are bolted onto the climbing surface with bolts and a threaded t-nut that is inserted into the back of the plywood panel. The drilled hole size should be 1/2". The set screws provide "spinner-free" use after installation, even in the most popular use areas. Bolts for fixing climbing holds. As a general guide, 1. T-Nuts are placed on the backside of the climbing wall and used for attaching bolt-on climbing holds with a 3/8" bolt. epu oilkqcq pjdewc vpa qunkss xuzi eaej uhemdxax fhmdk lfzju