Armstrong 78-403 3" Full Screw C-Clamp Deep Throat Pattern
Armstrong's 3" Full Screw C-Clamp Deep Throat Pattern is the most popular and versatile style C-Clamp. It's forcing screw has a sliding handle and has roll formed acme threads for greater strength, smoother running, reduced thread damage, producing more clamping force with less effort. This clamp meets or exceed US Federal Spec. GGG-C-406D.