Hexagon Nut and Bolt Sizes

Determine the maximum torque according to bolt (nut) size and grade. Always consult the manufacturers instructions or engineering recommendations when making bolted connections.

Important: the hexagon sizes shown in the tables should be used as a guide only. Individual sizes should be checked before specifying any equipment. Use only Heavy Duty Impact Sockets for power driven torquing equipment, according to ISO2725 and ISO1174, DIN3129 and DIN3121 or ASME-B107.2/1995.

Metric

Thread Size D
Hexagon Size S
Hexagon Size J
M 1017 mm8 mm
M 1219 mm10 mm
M 1422 mm12 mm
M 1624 mm14 mm
M 1827 mm14 mm
M 2030 mm17 mm
M 2232 mm17 mm
M 2436 mm19 mm
M 2741 mm19 mm
M 3046 mm22 mm
M 3350 mm24 mm
M 3655 mm27 mm
M 3960 mm27 mm
M 4265 mm32 mm
M 4570 mm
M 4875 mm36 mm
M 5280 mm36 mm
M 5685 mm41 mm
M 6090 mm46 mm
M 6495 mm46 mm
M 68100 mm50 mm
M 72105 mm55 mm
M 76110 mm60 mm
M 80115 mm65 mm
M 85120 mm70 mm
M 90130 mm70 (75) mm
M 95135 mm
M 100145 mm85 mm
M 105150 mm
M 110155 mm
M 115165 mm
M 120170 mm
M 125180 mm
M 130185 mm
M 140200 mm
M 150210 mm

Imperial

Thread Size D
Hexagon Size S
Hexagon Size J
5/8″1 1/16″1/2″
3/4″1 1/4″5/8″
7/8″1 7/16″3/4″
1″1 5/8″3/4″
1 1/8″1 13/16″7/8″
1 1/4″2″7/8″
1 3/8″2 3/16″1″
1 1/2″2 3/8″1″
1 5/8″2 9/16″
1 3/4″2 3/4″1 1/4″
1 7/8″2 15/16″1 3/8″
2″3 1/8″1 5/8″
2 1/4″3 1/2″1 3/4″
2 1/2″3 7/8″1 7/8″
2 3/4″4 1/4″2″
3″4 5/8″2 1/4″
3 1/4″5″2 1/4″