This is a Hidden Bolt Fastener & step drill combo kit. It features 10 Hidden Bolt Fasteners in the material and size specified below with the corresponding precision step drill for installation.
Hidden Bolt Fasteners used for knife handle attachment. With this design, you will create a step hole in your handle material that is slightly larger than the shank of the fastener. The two-part assembly allows for you to pass the shank precisely through your knife tang hole and handle material, allowing the larger radius of the fastener heads to create a pinch point on both sides of the handle material where it can then be tightened down to a secure hold. Once the hidden bolt has been tightened, it can be sanded to a flush finish with the knife handle surface. This will result in a smooth, pin-like visual effect. When used with epoxy and/or thread-locker adhesive, they will create a permanent handle bond.
Hidden Bolt Fastener
Head Diameter = .312 in. (ea.)
Head Length = .350 in. (ea.)
Shank Diameter = .140 in.
Shank Length = .400 in. (.900 in. w/thread)
Overall Length (min) = (1.10 in)
Overall Length (max) = (1.25 in)
Thread = US 8-32
Driver = Slot
Material = Brass
Designed for: Hidden Bolt Fasteners (shown in image)
Bit Dimensions = (0.312 step x 0.156 pilot) Inch
Material = HSS - High-Speed Steel
Sold As: (1) Hidden Bolt Fastener Combo Kit = (10) Threaded HBF Males + (10) Threaded HBF Females + (1) Step Drill