Part Number: 31FFHN8Y
Diameter/Pitch: 5/16"-24
Grade: Grade 8
Finish: Zinc Yellow
Coarse / Fine Threads: Fine
Wrench Size: 1/2"
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5/16"-24 Grade 8 Finished Hex Nuts Zinc Yellow
Part Number: 31FFHN8Y
Diameter/Pitch: 5/16"-24
Grade: Grade 8
Finish: Zinc Yellow
Coarse / Fine Threads: Fine
Wrench Size: 1/2"
Click Here for Tech Drawing

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| Diameter Pitch | 5/16"-24 |
| Finish | Zinc Yellow |
| Thread Class | 2B |
| Width Across Flats | 0.500" (1/2") |
| Major Diameter | 0.3125" |
| Tensile Stress Area | 0.0581 sq in |
| Thread Type | Finished Hex |
| Nominal Size | 5/16" |
| Grade | Grade 8 |
| Material | Medium carbon alloy steel, heat treated |
| Threads Per Inch | 24 TPI |
| Width Across Corners | 0.577" max |
| Proof Load | 8,710 lbf |
| Hardness | Rockwell C33–C39 |
| Head Type | Hex |
| Inch Metric | Inch |
| Grade Material | Grade 8 |
| Coarse Fine Threads | Fine |
| Wrench Size | 1/2" |
| Head Height | 17/64" |
| Proof Stress | 150,000 psi |
| Head Marking | J995 Grade 8 marking |
| Height | 0.266" nom |
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