Imperial Tensile Loads

Imperial Tensile Loads

Tensile strength is the maximum tension applied, as loading, that a fastener can support prior to, or coincidental with, its fracture.


Thread Size Major Diameter Stress Area

Tensile Load in kN as xRm*

304 UNC 2) & 316 UNC 2)

5-40 3.175 5.14 3.54
6-32 3.505 5.86 4.04
8-32 4.166 9.04 6.23
10-24 4.826 11.31 7.80
1/4-20 6.350 20.50 14.14
5/16-18 7.938 33.80 23.31
3/8-16 9.525 50.00 34.48
7/16-14 11.112 68.60 47.31
1/2-13 12.700 91.50 63.10
9/16-12 14.288 117.00 80.69
5/8-11 15.875 146.00 100.69
3/4-10 19.050 216.00 126.62
7/8-9 22.225 298.00 174.69
1-8 25.400 391.00 229.20
1-1/8-7 28.575 492.00 288.41

Note: This chart is provided as cross reference. For accurate values the actual specifications should be reviewed.

1) Strengths of A2 and A4 are identical

2) Cold worked (Ref. ASTM F 593)

3) Strain Hardened (Ref. ISO 3506)

4) Ref. ISO 3506


*AS = Stress Area

Rm = Tensile Strength

ReL = Yield Strength

Conversion metric/imperial: 1kN = 224.8lb


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