BOLTS & FASTENERS

GRK Star Drive Bits are the best made star bits. They have a patented design which is stronger, longer lasting, and higher quality than any other bit made Learn More

Nut Eye bolts are the main bolts used in ropes challenge course and zip line construction. Zipline and other cables are terminated to the eye bolt around a thimble to prevent cable deformation at the turn back. Learn More

Just Perfect Pole Steps, Installs with 5/8" x 6" lag in poles and 5/8" x 8" lag in trees for the JP I and II. The JP R uses a Specialty 4" Lag Bolt and plate that comes with it Learn More

Shoulder Eye Screw Lag, Use for connecting hand lines, spiders webs to trees, etc. on challenge courses. Do not use in life support applications. Also used when wrapping cable around a tree. Learn More

Our Machine Bolts are hot dip galvanized, forged steel, quenched and tempered and are sold with hex nuts attached. Round or square washers and lock washers can be added separately. Learn More

Zip Line LEAP Anchor, A high-strength, multi-purpose anchor that can be used equally well as self-belay anchors on staple climbs or as the ideal termination fitting on belay cables anywhere where the cable load is at 90° to the angle of the bolt Learn More

Nut Eye bolts are the main bolts used in ropes challenge course and zip line construction. Zipline and other cables are terminated to the eye bolt around a thimble to prevent cable deformation at the turn back. Learn More

Thimbleye® bolts are forged in two styles, straight and bent at a 45° angle. The broad radius of the eye provides an excellent attachment point to dead-end or guy messenger wire, guy strand or formed wire grips. Learn More

Forged Nut Eye bolts are the backbone of ropes challenge course and zip line construction. Zip line and other cables are terminated to the eye bolt around a thimble to prevent cable deformation at the turn back. Learn More

Carriage Bolt w/Nut & Washer, The square neck under the round head will seat into the hole in the wood to prevent the head from turning. Because they are used with wood, carriage bolts are rarely high strength and virtually always supplied in a standard ASTM A307 specification. Learn More

Square Curved Washers for nut eye bolts and machine bolts. Galvanized Square washers designed for outdoor use in challenge courses, zip lines and other outdoor applications. Learn More

Used as spacers or supports under screw or bolt heads. Our washers are heat treated galvanized. Learn More

Lock washers are a critical component to through bolts on wood poles. Pole shrinkage mandates the use of double coil lock washers to keep pressure on the nut and bolt to prevent loosening. Learn More

3/4" Timber Bolts, Super strong and easy to install, Timber bolts are used for pole to pole attachments, deck beam mounts, climbing towers, climbing walls, adventure towers, high ropes course elements and low ropes course elements Learn More

Lag Screw Lag Bolt - Galvanized, Typically used for LEAP anchors, deck constuction for zip lines and ropes courses. Hot Dipped Galvanized; Hex Head Lag Screw. 5/8" x 6" lags or 5/8" x 8" lags are recommended for Leap/Lead/Bolt hanger anchors where through bolts are not required Learn More

EYE NUTS and EYELETS, Eyelets, also known as Bolt Eyes, are used under the head or nut of a bolt. All are compatible with the strength of the bolts used with them. Learn More

GRK's RSSTM Rugged Structural Screw is made of specially hardened steel to provide you with high tensile, torque and shear strength. The sharp threads and points bite instantly into the material (including hardwood), reducing the splitting effect due to smaller shanks. Learn More

GRK's RSS Rugged Structural Screw is made of specially hardened steel to provide you with high tensile, torque and shear strength. The sharp threads and points bite instantly into the material (including hardwood), reducing the splitting effect due to smaller shanks. The 5/16" has a shear strength of up to 1,800 lbs. The 3/8" has a shear strength of up to 2,900 lbs Learn More

Cable Drop Plate, The lower 1" tie-in hole allows easy attachment of a carabiner or quicklinks. Hot dip galvanized for lasting durability. Cable drop plates are great for giant ladders, giant swings, rope climbs, tire crossings or just about any ropes course element Learn More

GRK's RSS Rugged Structural Screw is made of specially hardened steel to provide you with high tensile, torque and shear strength. The sharp threads and points bite instantly into the material (including hardwood), reducing the splitting effect due to smaller shanks. The 5/16" has a shear strength of up to 1,800 lbs. The 3/8" has a shear strength of up to 2,900 lbs. Learn More

Gripple Ropes Course Cable Connector, Learn More

They fit securely on a wide range of flange widths and beam sizes, with a built-in suspension bar that provides for close mounting. The clamp jaw design reduces flange stress by distributing the load away from the flange edge. Learn More

GRK's RSS Rugged Structural Screw is made of specially hardened steel to provide you with high tensile, torque and shear strength. Learn More

GUY ANCHORS- Helix Ground Anchors, Multiple sizes and capacities allow precise designs for the adventure and zip line industry. There may be one or multiple guywires that can be resisted by one or multiple guy wire anchors, dictated by design and load requirements. Learn More