Gibraltar 1/4-20, 0.8" Thread Length, 0.155" Plunger Diam, 1/4" Plunger Projection, 1 Lb Init to 2.5 Lb Final End Force, Stainless Steel Locking Pull Ring Plunger 0.8" Len Under Head, 1.14" Body Len, 0.62" Ring Diam, 1.14" Plunger Len, 0.34" Head Height