Steel 1045 or alternate in accordance with od8853 type c, grade 2, quench and draw to 200-250 brinell, indicated edges /0.250 in. R./ harden to 45-50 rockwell c, protective finish per u.S. Army specification 57-0-2 type 2, class a, 4.250 in. H, 0.500 in. W, 5.844 in. Lg o/a