ASME B18.31.2 Continuous, Double End and Flange Stud Bolts (Studs)

ASME B18.31.2 Continuous and Double End Stud Bolts (Studs)

Dimensions of ASME B18.31.2 Continuous, Double End and Flange Stud Bolts

Nominal Size Diameter, D Threads Per Inch Umax = 2 Thread Pitches = 2P
UNC UNF 8UN UNC Threads UNF Threads 8UN Threads
1/4 0.2500 20 28 - 0.100 0.071 -
5/16 0.3125 18 2424 - 0.111 0.083 -
3/8 0.3750 16 20 - 0.125 0.083 -
7/16 0.4375 14 20 - 0.143 0.100 -
1/2 0.5000 13 1816 - 0.154 0.100 -
9/16 0.5625 12 14 - 0.167 0.111 -
5/8 0.6250 11 12 - 0.182 0.111 -
3/4 0.7500 10 12 - 0.200 0.125 -
7/8 0.8750 9 12 - 0.222 0.143 -
1 1.0000 8 12 - 0.250 0.167 -
1 1/8 1.1250 7 12 8 0.286 0.167 0.250
1 1/4 1.2500 7 - 8 0.286 0.167 0.250
1 3/8 1.3750 6 - 8 0.333 0.167 0.250
1 1/2 1.5000 6 - 8 0.333 0.167 0.250
1 5/8 1.6250 - - 8 - - 0.250
1 3/4 1.7500 5 - 8 0.400 - 0.250
1 7/8 1.8750 - - 8 - - 0.250
2 2.0000 4 1/2 - 8 0.444 -- 0.250
2 1/4 2.2500 4 1/2 - 8 0.444 - 0.250
2 1/2 2.5000 4 - 8 0.500 - 0.250
2 3/4 2.7500 4 - 8 0.500 - 0.250
3 3.0000 4 - 8 0.500 - 0.250
3 1/4 3.2500 4 - 8 0.500 - 0.250
3 1/2 3.5000 4 - 8 0.500 - 0.250
3 3/4 3.7500 4 - 8 0.500 - 0.250
4 4.0000 4 - 8 0.500 - 0.250

Notes : Non preferred size, not recommended for new design due to limited availability