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Dimensions for Clamping Type Studs（A193 / A320 / A437 / A453 / A540 / A1014） (Inch Series) [Table 2]

ASME B 18.31.2 - 2014

Display drawing:

Screw Thread 5/16 3/8 7/16 1/2 9/16 5/8 3/4 7/8 1 1-1/4 1-3/8 1-1/2 1-5/8 1-3/4 1-7/8 2 2-1/4 2-1/2 2-3/4 3 3-1/4 3-1/2 3-3/4 4 1/4 1-1/8
D 0.3125 0.3750 0.4375 0.5000 0.5625 0.6250 0.7500 0.8750 1.0000 1.25 1.375 1.5 1.6250 1.7500 1.8750 2.0000 2.2500 2.5000 2.7500 3.0000 3.2500 3.5000 3.7500 4.0000 0.2500 1.125
P 18 16 14 13 12 11 10 9 8 7 6 6 12 5 12 4.5 4.5 4 4 4 4 4 4 4 20 7
B Min L≤10 0.875 1.000 1.125 1.250 1.375 1.500 1.750 2.000 2.250 2.75 3 3.25 3.500 3.750 4.000 4.250 4.750 5.250 5.750 None None None None None 0.750 2.5
B Min 10＜L≤16 1.125 1.250 1.375 1.500 1.625 1.750 2.000 2.250 2.500 3 3.25 3.5 3.750 4.000 4.250 4.500 5.000 5.500 6.000 6.500 7.000 7.500 8.000 8.500 1.000 2.75
B Min L＞16 1.625 1.750 1.875 2.000 2.125 2.250 2.500 2.750 3.000 3.5 3.75 4 4.250 4.500 4.750 5.000 5.500 6.000 6.500 7.000 7.500 8.000 8.500 9.000 1.500 3.25
U Max UNC 0.111 0.125 0.143 0.154 0.167 0.182 0.200 0.222 0.250 0.286 0.333 0.333 None 0.400 None 0.444 0.444 0.500 0.500 0.500 0.500 0.500 0.500 0.500 0.100 0.286
U Max UNF 0.083 0.083 0.100 0.100 0.111 0.111 0.125 0.143 0.167 0.167 0.167 0.167 None None None None None None None None None None None None 0.071 0.167
U Max BUN None None None None None None None None None 0.25 0.25 0.25 0.250 0.250 0.250 0.250 0.250 0.250 0.250 0.250 0.250 0.250 0.250 0.250 None 0.25
Ds Max 0.3125 0.3750 0.4375 0.5000 0.5625 0.6250 0.7500 0.8750 1.0000 1.25 1.375 1.5 1.6250 1.7500 1.8750 2.0000 2.2500 2.5000 2.7500 3.0000 3.2500 3.5000 3.7500 4.0000 0.2500 1.125
Ds Min UNC 0.303 0.364 0.426 0.488 0.550 0.611 0.735 0.859 0.983 1.231 1.354 1.479 None 1.727 None 1.975 2.225 2.473 2.723 2.973 3.223 3.473 3.723 3.973 0.241 1.106
Ds Min UNF 0.304 0.367 0.428 0.491 0.552 0.615 0.739 0.863 0.987 1.237 1.362 1.487 None None None None None None None None None None None None 0.243 1.112
Ds Min BUN None None None None None None None None None 1.233 1.358 1.483 1.608 1.733 1.858 1.983 2.233 2.483 2.733 2.982 3.232 3.482 3.732 3.982 None 1.108
Ds1 Max UNC 0.303 0.364 0.426 0.488 0.550 0.611 0.735 0.859 0.983 1.231 1.354 1.479 None 1.727 None 1.975 2.225 2.473 2.723 2.973 3.223 3.473 3.723 3.973 0.241 1.106
Ds1 Max UNF 0.304 0.367 0.428 0.491 0.552 0.615 0.739 0.863 0.987 1.237 1.362 1.487 None None None None None None None None None None None None 0.243 1.112
Ds1 Max BUN None None None None None None None None None 1.233 1.358 1.483 1.608 1.733 1.858 1.983 2.233 2.483 2.733 2.982 3.232 3.482 3.732 3.982 None 1.108
Ds1 Min UNC 0.271 0.329 0.385 0.444 0.502 0.559 0.677 0.795 0.910 1.148 1.256 1.381 None 1.609 None 1.843 2.093 2.324 2.574 2.824 3.073 3.323 3.573 3.823 0.213 1.023
Ds1 Min UNF 0.281 0.343 0.400 0.462 0.521 0.583 0.703 0.822 0.938 1.188 1.313 1.438 None None None None None None None None None None None None 0.223 1.063
Ds1 Min BUN None None None None None None None None None 1.16 1.284 1.409 1.534 1.659 1.784 1.909 2.158 2.408 2.658 2.908 3.158 3.407 3.657 3.907 None 1.035