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Product Description
Part Number: 31SNT8Y/USA
Diameter: 5/16"
Grade: Grade 8
Finish: Zinc Yellow
Inside Diameter : 0.344"
Outside Diameter: 0.688"
Thickness : 0.065"
Country of Origin: USA
BoltsandNuts.com
5/16" SAE Grade 8 Flat Washers Zinc Yellow (USA Made)
Product Description
Part Number: 31SNT8Y/USA
Diameter: 5/16"
Grade: Grade 8
Finish: Zinc Yellow
Inside Diameter : 0.344"
Outside Diameter: 0.688"
Thickness : 0.065"
Country of Origin: USA
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1
$0.22/pc
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200
$0.16/pc
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$0.14/pc
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9700
$0.0829/pc
$0.22
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| Grade | Grade 8 Hardened |
| Hardness | Rockwell C33–C39 |
| Diameter | 5/16" |
| Inside Diameter | 0.344" nom |
| Material | Through-hardened steel |
| Specifications Met | ASME B18.22.1 |
| Thickness | 0.065" nom |
| System | Inch |
| Finish | Zinc Yellow |
| Pattern | SAE (Narrow) series |
| Outside Diameter | 0.688" nom |
Technical Drawing
Not to scale · ASME B18.22.1 · See table for exact dimensions
Technical Dimensions
| Outside Diameter | 0.688" nom |
| Inside Diameter | 0.344" nom |
| Thickness | 0.065" nom |
| Fits Bolt Size | 5/16" |
| Series | SAE (Narrow) series |
| Material | Through-hardened steel |
Flat round washer that spreads bolt and nut bearing load over a wider area, protecting the joint material and reducing pull-through or marring.
Dimensions conform to ASME B18.22.1 and may vary within specified manufacturing tolerances.
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