Profile: Allegheny Bolt & Screw Corp. specializes in providing security nuts, bolts and screws. We also offer Tampruf™ fasteners. Our products include nuts, sockets & bits, drivers, hex, spanner and one way screws. Our nuts are made of steel low carbon case harden zinc plate conically shape with three equally spaced drivind slots formed into the outer periphery. It is used in vending machine auto accessories, lockers, motels furnishings and public phones.