Steel, fed specification qq-s-633, b1112 to c1120 or c1015 to c1025, 1.940 in. Lg, 0.750 in. W, 0.750 in. H, cadmium plated protective finish, fed specification qq-p-416, type 1, class 3, both ends threaded, one end 1/2-20unf-2b thread, 0.620 in. Deep, opposite end 1/4-28unf-2b thread 0.750 in. Deep