8slotted headless set screw; 1.750 in. Lg; .500 in. Dia; 13unc-2a right-hand threads; aluminum alloy qq-a-225/9; anodize to military specification mil-a-8625, type 2 class 2 dyed olive drab no.34087of fed-std-595; each set screw set shall consist of eight screws