Part Number: 31CNHF5Z/FS
Diameter/Pitch: 5/16"-18
Grade: Grade 5
Finish: Zinc Clear
Coarse / Fine Threads: Coarse
Wrench Size: 1/2"
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5/16"-18 Grade 5 Hex Flange Nuts Zinc Clear
Part Number: 31CNHF5Z/FS
Diameter/Pitch: 5/16"-18
Grade: Grade 5
Finish: Zinc Clear
Coarse / Fine Threads: Coarse
Wrench Size: 1/2"
Click Here for Tech Drawing

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| Diameter Pitch | 5/16"-18 |
| Finish | Zinc Clear |
| Thread Class | 2B |
| Width Across Flats | 0.500" (1/2") |
| Major Diameter | 0.312" |
| Tensile Stress Area | 0.0524 sq in |
| Head Type | Hex Flange |
| Grade | Grade 5 |
| Material | Medium carbon steel, quenched and tempered |
| Threads Per Inch | 18 TPI |
| Width Across Corners | 0.577" max |
| Proof Load | 6,290 lbf |
| Hardness | Rockwell C25–C34 |
| Nominal Size | 5/16" |
| Grade Material | Grade 5 |
| Coarse Fine Threads | Coarse |
| Wrench Size | 1/2" |
| Head Height | 17/64" |
| Proof Stress | 120,000 psi |
| Head Marking | J995 Grade 5 marking |
| Inch Metric | Inch |
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