These are Hidden Bolt Fasteners. They are 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.
Head Diameter = .312 in. (ea.)
Head Length = .350 in. (ea.)
Shank Diameter = .162 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
1 Hidden Bolt Fastener = (1 male + 1 female)