1 3/8-6 X 6 1/2 GR.5 HHCS
1 1/2-6 X 6 1/2 HHCS GR 5
1 1/2-6 X 6 1/2 HEX HD GR8
1 3/8-6 X 6 1/2 HHCS GR. 5 ZINC
1 3/8-6 X 6 1/2 HHCS GR 8