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Hex Trim Head Machine Screw, Plated

Selected Hex Head Machine Screw Carbon Steel PlatedHex Trim Head Machine Screw, Plated
Hex Head Machine Screw Carbon Steel PlatedHex Trim Head Machine Screw, Plated

Machine screws are uniformly threaded fasteners with a blunt end that are used with a threaded nut or threaded into a tapped hole. The hex indented head is less prone to stripping than some other drive types. These fasteners are available in a zinc plated finish.

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Dimensional Specifications

Type 2A Threads for Machine Screws dimensions
ASME B1.1 (2008)
Nominal
Size		 Threads
per Inch		 Allowance Major
Diameter		 Pitch Diameter Stress
Area in2		 Tensile Strength, a
lb., min. (STEEL
screws only)
Max Min Max Min Tolerance
#0 80 0.0005 0.0595 0.0563 0.0514 0.0496 0.001762 0.00180 -
#1 64 0.0006 0.0724 0.0686 0.0623 0.0603 0.001970 0.00263 -
#1 72 0.0006 0.0724 0.0689 0.0634 0.0615 0.001899 0.00278 -
#2 56 0.0006 0.0854 0.0813 0.0738 0.0717 0.002127 0.00370 -
#2 64 0.0006 0.0854 0.0816 0.0753 0.0733 0.002040 0.00394 -
#3 48 0.0007 0.0983 0.0938 0.0848 0.0825 0.002302 0.00487 -
#3 56 0.0007 0.0983 0.0942 0.0867 0.0845 0.002191 0.00523 -
#4 40 0.0008 0.1112 0.1061 0.0950 0.0925 0.002507 0.00604 360
#4 48 0.0007 0.1113 0.1068 0.0978 0.0954 0.002361 0.00661 396
#5 40 0.0008 0.1242 0.1191 0.1080 0.1054 0.002562 0.00796 470
#5 44 0.0007 0.1243 0.1195 0.1095 0.1070 0.002484 0.00830 498
#6 32 0.0008 0.1372 0.1312 0.1169 0.1141 0.002820 0.00909 550
#6 40 0.0008 0.1372 0.1321 0.1210 0.1184 0.002614 0.01015 609
#8 32 0.0009 0.1631 0.1571 0.1428 0.1399 0.002916 0.01400 850
#8 36 0.0008 0.1632 0.1577 0.1452 0.1424 0.002804 0.01474 884
#10 24 0.0010 0.1890 0.1818 0.1619 0.1586 0.003319 0.01750 1050
#10 32 0.0009 0.1891 0.1831 0.1688 0.1658 0.003004 0.02000 1200
#12 24 0.0010 0.2150 0.2078 0.1879 0.1845 0.003400 0.02420 1450
#12 28 0.0010 0.2150 0.2085 0.1918 0.1886 0.003224 0.02580 1548
1/4 20 0.0011 0.2489 0.2408 0.2164 0.2127 0.003731 0.03180 1900
1/4 28 0.0010 0.2490 0.2425 0.2258 0.2225 0.003322 0.03640 2200
5/16 18 0.0012 0.3113 0.3026 0.2752 0.2712 0.004041 0.05240 3150
5/16 24 0.0011 0.3114 0.3042 0.2843 0.2806 0.003660 0.05800 3480
3/8 16 0.0013 0.3737 0.3643 0.3331 0.3287 0.004363 0.07750 4650
3/8 24 0.0011 0.3739 0.3667 0.3468 0.3430 0.003804 0.08780 5268
1/2 13 0.0015 0.4985 0.4876 0.4485 0.4435 0.004965 0.14190 8500
1/2 20 0.0013 0.4987 0.4906 0.4662 0.4619 0.004288 0.15990 9594
Tolerance
on Length		 Nominal
Screw Size		 Nominal Screw Length
Up to 1/2 in., incl. Over 1/2 to 1 in., incl. Over 1 to 2 in., incl. Over 2 in.
0 thru 12 -0.02 -0.03 -0.06 -0.09
L 1/4 thru 3/4 -0.03 -0.03 -0.06 -0.09
  1. a Tensile strength values are based on 60,000 psi and apply to carbon steel screws and SEMS only. Hex and Hex Washer head machine screws of sufficient length may be wedge tensile tested. Other head styles may be axial tensile tested.
  2. All dimensions are in inches.
Hex Trim Head for Machine Screws dimensions
ASME B18.6.3-2013
Nominal
Size		 A W H
Width
Across Flats		 Width
Across
Corners		 Height
of Head
Max Min Min Max Min
#2 0.125 0.120 0.134 0.050 0.040
#4 0.188 0.188 0.202 0.060 0.049
#5 0.188 0.181 0.202 0.070 0.058
#6 0.250 0.244 0.272 0.093 0.080
#8 0.250 0.244 0.272 0.110 0.096
#10 0.312 0.305 0.340 0.120 0.105
#12 0.312 0.305 0.340 0.155 0.139
1/4 0.375 0.367 0.409 0.190 0.172
5/16 0.500 0.489 0.545 0.230 0.208
3/8 0.562 0.551 0.614 0.295 0.270
1/2 0.750 0.735 0.820 0.400 0.367
  1. All dimensions are in inches.