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Hex Setscrew (Imperial)

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HEX SETSCREWS (IMPERIAL)

BS1768 / ASME B18.2.1

DIA UNC (TPI) UNF (TPI) A/F (F) A/C (C) HEIGHT (H) RADIUS (R)
1/420280.428 - 0.4380.488 - 0.5050.150 - 0.1630.015 - 0.025
5/1618240.489 - 0.5000.557 - 0.5770.195 - 0.2110.015 - 0.025
3/816240.551 - 0.5620.628 - 0.6500.226 - 0.2430.015 - 0.025
7/1614200.612 - 0.6250.698 - 0.7220.272 - 0.2910.015 - 0.025
1/213200.736 - 0.7500.804 - 0.8660.302 - 0.3230.015 - 0.025
9/1612180.798 - 0.8120.910 - 0.9380.348 - 0.3710.020 - 0.045
5/811180.922 - 0.9381.051 - 1.0830.378 - 0.4030.020 - 0.045
3/410161.100 - 1.1251.254 - 1.2990.455 - 0.4830.020 - 0.045
7/89141.285 - 1.3121.465 - 1.5160.531 - 0.5630.040 - 0.065
1"8121.469 - 1.5001.675 - 1.7320.591 - 0.6270.060 - 0.095
1-1/8781.631 - 1.6881.859 - 1.9490.658 - 0.7180.060 - 0.095
1-1/4781.812 - 1.8752.066 - 2.1650.749 - 0.8130.060 - 0.095
1-3/8681.994 - 2.0622.273 - 2.3820.810 - 0.8780.060 - 0.095
1-1/2682.175 - 2.2502.480 - 2.5980.902 - 0.9740.060 - 0.095
DIA
1/4
UNC (TPI)20
UNF (TPI)28
A/F (F)0.428 - 0.438
A/C (C)0.488 - 0.505
HEIGHT (H)0.150 - 0.163
RADIUS (R)0.015 - 0.025
5/16
UNC (TPI)18
UNF (TPI)24
A/F (F)0.489 - 0.500
A/C (C)0.557 - 0.577
HEIGHT (H)0.195 - 0.211
RADIUS (R)0.015 - 0.025
3/8
UNC (TPI)16
UNF (TPI)24
A/F (F)0.551 - 0.562
A/C (C)0.628 - 0.650
HEIGHT (H)0.226 - 0.243
RADIUS (R)0.015 - 0.025
7/16
UNC (TPI)14
UNF (TPI)20
A/F (F)0.612 - 0.625
A/C (C)0.698 - 0.722
HEIGHT (H)0.272 - 0.291
RADIUS (R)0.015 - 0.025
1/2
UNC (TPI)13
UNF (TPI)20
A/F (F)0.736 - 0.750
A/C (C)0.804 - 0.866
HEIGHT (H)0.302 - 0.323
RADIUS (R)0.015 - 0.025
9/16
UNC (TPI)12
UNF (TPI)18
A/F (F)0.798 - 0.812
A/C (C)0.910 - 0.938
HEIGHT (H)0.348 - 0.371
RADIUS (R)0.020 - 0.045
5/8
UNC (TPI)11
UNF (TPI)18
A/F (F)0.922 - 0.938
A/C (C)1.051 - 1.083
HEIGHT (H)0.378 - 0.403
RADIUS (R)0.020 - 0.045
3/4
UNC (TPI)10
UNF (TPI)16
A/F (F)1.100 - 1.125
A/C (C)1.254 - 1.299
HEIGHT (H)0.455 - 0.483
RADIUS (R)0.020 - 0.045
7/8
UNC (TPI)9
UNF (TPI)14
A/F (F)1.285 - 1.312
A/C (C)1.465 - 1.516
HEIGHT (H)0.531 - 0.563
RADIUS (R)0.040 - 0.065
1"
UNC (TPI)8
UNF (TPI)12
A/F (F)1.469 - 1.500
A/C (C)1.675 - 1.732
HEIGHT (H)0.591 - 0.627
RADIUS (R)0.060 - 0.095
1-1/8
UNC (TPI)7
UNF (TPI)8
A/F (F)1.631 - 1.688
A/C (C)1.859 - 1.949
HEIGHT (H)0.658 - 0.718
RADIUS (R)0.060 - 0.095
1-1/4
UNC (TPI)7
UNF (TPI)8
A/F (F)1.812 - 1.875
A/C (C)2.066 - 2.165
HEIGHT (H)0.749 - 0.813
RADIUS (R)0.060 - 0.095
1-3/8
UNC (TPI)6
UNF (TPI)8
A/F (F)1.994 - 2.062
A/C (C)2.273 - 2.382
HEIGHT (H)0.810 - 0.878
RADIUS (R)0.060 - 0.095
1-1/2
UNC (TPI)6
UNF (TPI)8
A/F (F)2.175 - 2.250
A/C (C)2.480 - 2.598
HEIGHT (H)0.902 - 0.974
RADIUS (R)0.060 - 0.095

  • Dimensions in inches

  • Available in SAE Grade 5 & Grade 8 Steel and A2 & A4 Stainless Steel

  • Other materials manufactured on request