Heavy hexagonal nuts H=D ASTM A 194 GR 8 1000 DIA. 1/2" 1800 DIA. 5/8" 1800 DIA. 3/4" 1000 DIA. 7/8" 1650 DIA. 1" 1520 DIA. 1.1/8" 1400 DIA. 1.1/4" 100 DIA. 1.1/2" 100 DIA. 1.5/8" 100 DIA. 1.7/8" 1000 DIA. M24 2000 DIA. M27 1000 DIA. M22 1100 DIA. M20 1000 DIA. M36 1000 DIA. M16