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Weights for ASME B18.31.2 Tap End Studs

Dimensions for Tap End Studs to ASME B18.31.2 Standard

Dimensions for Tap End Studs to ASME B18.31.2 Standard

Nominal Size
Thread Diameter, D, Inch.		 Tap End Full Thread Length, BM Umax = 2P Minimum Nut End Full Thread Length, Bmin
Nominal Min. Max. UNC & NC-5 Thread UNF Thread 8UN Thread L ≤ 10 10 < L ≤ 16 L > 16
1/4 0.375 0.350 0.400 0.100 0.071 … 0.750 1.000 1.500
5/16 0.469 0.440 0.498 0.111 0.083 — 0.875 1.125 1.625
3/8 0.563 0.532 0.594 0.125 0.083 — 1.000 1.250 1.750
7/16 0.656 0.620 0.692 0.143 0.100 — 1.125 1.375 1.875
1/2 0.750 0.708 0.792 0.154 0.100 — 1.250 1.500 2.000
9/16 0.844 0.802 0.896 0.167 0.111 — 1.375 1.625 2.125
5/8 0.938 0.892 0.983 0.182 0.111 — 1.500 1.750 2.250
3/4 1.1.25 1.075 1.175 0.200 0.125 — 1.750 2.000 2.500
7/8 1.313 1.258 1.368 0.222 0.143 — 2.000 2.250 2.750
1 1.500 1.438 1.562 0.250 0.167 — 2.250 2.500 3.000
1 1/8 1.688 1.625 1.750 0.286 0.167 0.250 2.500 2.750 3.250
1 1/4 1.875 1.813 1.938 0.286 0.167 0.250 2.750 3.000 3.500
1 3/8 2.063 2.000 2.125 0.333 0.167 0.250 3.000 3.250 3.750
1 1/2 2.250 2.188 2.313 0.333 0.167 0.250 3.250 3.500 4.000
1 5/8 2.438 2.375 2.500 — — 0.250 3.500 3.750 4.250
1 3/4 2.625 2.563 2.688 0.400 — 0.250 3.750 4.000 4.500
1 7/8 2.813 2.750 2.875 — — 0.250 4.000 4.250 4.750
2 3.000 2.925 3.075 0.444 — 0.250 4.250 4.500 5.000
2 1/4 3.375 3.300 3.450 0.444 — 0.250 4.750 5.000 5.500
2 1/2 3.750 3.675 3.825 0.500 — 0.250 5.250 5.500 6.000
2 3/4 4.125 4.050 4.200 0.500 — 0.250 5.750 6.000 6.500
3 4.500 4.425 4.575 0.500 — 0.250 — 6.500 7.000
3 1/4 4.875 4.775 4.975 0.500 — 0.250 — 7.000 7.500
3 1/2 5.250 5.150 5.350 0.500 — 0.250 — 7.500 8.000
3 3/4 5.625 5.525 5.725 0.500 — 0.250 — 8.000 8.500
4 6.000 5.900 6.100 0.500 — 0.250 — 8.500 9.000