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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