PETROCHEMICAL
Plating & Coatings
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Hex Connecting Nut
I-Rod / Nu-Bolts
HEX BOLTS (IMPERIAL)
BS1768 / ASME B18.2.1
| DIA | TPI | A/F | A/C | HEIGHT | RADIUS | THREAD (T) | ||
|---|---|---|---|---|---|---|---|---|
| UNC | UNF | (F) | (C) | (H) | (R) | L ≤ 6" | L > 6" | |
| 1/4 | 20 | 28 | 0.428 - 0.438 | 0.488 - 0.505 | 0.150 - 0.188 | 0.015 - 0.025 | 0.750 | 1.000 |
| 5/16 | 18 | 24 | 0.489 - 0.500 | 0.557 - 0.577 | 0.195 - 0.235 | 0.015 - 0.025 | 0.875 | 1.125 |
| 3/8 | 16 | 24 | 0.551 - 0.562 | 0.628 - 0.650 | 0.226 - 0.268 | 0.015 - 0.025 | 1.000 | 1.250 |
| 7/16 | 14 | 20 | 0.612 - 0.625 | 0.698 - 0.722 | 0.272 - 0.316 | 0.015 - 0.025 | 1.125 | 1.375 |
| 1/2 | 13 | 20 | 0.736 - 0.750 | 0.804 - 0.866 | 0.302 - 0.364 | 0.015 - 0.025 | 1.250 | 1.500 |
| 9/16 | 12 | 18 | 0.798 - 0.812 | 0.910 - 0.938 | 0.348 - 0.371 | 0.020 - 0.045 | 1.375 | 1.625 |
| 5/8 | 11 | 18 | 0.922 - 0.938 | 1.051 - 1.083 | 0.378 - 0.444 | 0.020 - 0.045 | 1.500 | 1.750 |
| 3/4 | 10 | 16 | 1.100 - 1.125 | 1.254 - 1.299 | 0.455 - 0.524 | 0.020 - 0.045 | 1.750 | 2.000 |
| 7/8 | 9 | 14 | 1.285 - 1.312 | 1.465 - 1.516 | 0.531 - 0.604 | 0.040 - 0.065 | 2.000 | 2.250 |
| 1" | 8 | 12 | 1.469 - 1.500 | 1.675 - 1.732 | 0.591 - 0.700 | 0.060 - 0.095 | 2.250 | 2.500 |
| 1-1/8 | 7 | 8 | 1.631 - 1.688 | 1.859 - 1.949 | 0.658 - 0.780 | 0.060 - 0.095 | 2.500 | 2.750 |
| 1-1/4 | 7 | 8 | 1.812 - 1.875 | 2.066 - 2.165 | 0.749 - 0.876 | 0.060 - 0.095 | 2.750 | 3.000 |
| 1-3/8 | 6 | 8 | 1.994 - 2.062 | 2.273 - 2.382 | 0.810 - 0.940 | 0.060 - 0.095 | 3.000 | 3.250 |
| 1-1/2 | 6 | 8 | 2.175 - 2.250 | 2.480 - 2.598 | 0.902 - 1.036 | 0.060 - 0.095 | 3.250 | 3.500 |
DIA
1/4
UNC (TPI)20
UNF (TPI)28
A/F0.428 - 0.438
A/C0.488 - 0.505
Height0.150 - 0.188
Radius0.015 - 0.025
Thread ≤ 6"0.750
Thread > 6"1.000
5/16
UNC (TPI)18
UNF (TPI)24
A/F0.489 - 0.500
A/C0.557 - 0.577
Height0.195 - 0.235
Radius0.015 - 0.025
Thread ≤ 6"0.875
Thread > 6"1.125
3/8
UNC (TPI)16
UNF (TPI)24
A/F0.551 - 0.562
A/C0.628 - 0.650
Height0.226 - 0.268
Radius0.015 - 0.025
Thread ≤ 6"1.000
Thread > 6"1.250
7/16
UNC (TPI)14
UNF (TPI)20
A/F0.612 - 0.625
A/C0.698 - 0.722
Height0.272 - 0.316
Radius0.015 - 0.025
Thread ≤ 6"1.125
Thread > 6"1.375
1/2
UNC (TPI)13
UNF (TPI)20
A/F0.736 - 0.750
A/C0.804 - 0.866
Height0.302 - 0.364
Radius0.015 - 0.025
Thread ≤ 6"1.250
Thread > 6"1.500
9/16
UNC (TPI)12
UNF (TPI)18
A/F0.798 - 0.812
A/C0.910 - 0.938
Height0.348 - 0.371
Radius0.020 - 0.045
Thread ≤ 6"1.375
Thread > 6"1.625
5/8
UNC (TPI)11
UNF (TPI)18
A/F0.922 - 0.938
A/C1.051 - 1.083
Height0.378 - 0.444
Radius0.020 - 0.045
Thread ≤ 6"1.500
Thread > 6"1.750
3/4
UNC (TPI)10
UNF (TPI)16
A/F1.100 - 1.125
A/C1.254 - 1.299
Height0.455 - 0.524
Radius0.020 - 0.045
Thread ≤ 6"1.750
Thread > 6"2.000
7/8
UNC (TPI)9
UNF (TPI)14
A/F1.285 - 1.312
A/C1.465 - 1.516
Height0.531 - 0.604
Radius0.040 - 0.065
Thread ≤ 6"2.000
Thread > 6"2.250
1"
UNC (TPI)8
UNF (TPI)12
A/F1.469 - 1.500
A/C1.675 - 1.732
Height0.591 - 0.700
Radius0.060 - 0.095
Thread ≤ 6"2.250
Thread > 6"2.500
1-1/8
UNC (TPI)7
UNF (TPI)8
A/F1.631 - 1.688
A/C1.859 - 1.949
Height0.658 - 0.780
Radius0.060 - 0.095
Thread ≤ 6"2.500
Thread > 6"2.750
1-1/4
UNC (TPI)7
UNF (TPI)8
A/F1.812 - 1.875
A/C2.066 - 2.165
Height0.749 - 0.876
Radius0.060 - 0.095
Thread ≤ 6"2.750
Thread > 6"3.000
1-3/8
UNC (TPI)6
UNF (TPI)8
A/F1.994 - 2.062
A/C2.273 - 2.382
Height0.810 - 0.940
Radius0.060 - 0.095
Thread ≤ 6"3.000
Thread > 6"3.250
1-1/2
UNC (TPI)6
UNF (TPI)8
A/F2.175 - 2.250
A/C2.480 - 2.598
Height0.902 - 1.036
Radius0.060 - 0.095
Thread ≤ 6"3.250
Thread > 6"3.500
Dimensions in inches
Available in SAE Grade 5 & Grade 8 Steel and A2 & A4 Stainless Steel
Other materials manufactured on request