Covering compact hex-head, round-head square-neck, countersunk, button-head, and flanged bolts and screws with external hex, cross-recess, hexagon-socket, or hexalobular-socket drives for mechanical fastening, flush installation, and space-limited assemblies.

Covering long studs, standoffs, expansion assemblies, screw-and-washer assemblies, spring-loaded fasteners, and special turned threaded parts for fastening, supporting, spacing, positioning, preloading, and custom assembly requirements.

Designed for mechanical fastening and internal thread reinforcement, including nuts, knurled threaded inserts, and various cylindrical or blind-end configurations for different joints and host materials.

Designed for use with bolts, screws, and nuts. Flat washers enlarge the bearing area, distribute clamping load, and help protect the mounting surface, while external-tooth lock washers engage the contact surface with radial teeth to increase resistance to rotational loosening.