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Weights for ASME B18.31.2 Continuous Thread Studs

Dimensions of Continuous Thread Studs to ASME B18.31.2 Standard

Dimensions of Continuous Thread Studs to ASME B18.31.2 Standard

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