FAB-LOK Fasteners with 18-8 Stainless Steel Screw, Aluminum Sleeve, EPDM Sealing Washer, .250-.500 Grip Range

Vibration, either from inside or outside a building, can make ordinary fasteners loosen and back out. Fab-Lok fasteners combine a screw and a slotted aluminum sleeve to provide resistance to loosening in high-stress and high-vibration environments.