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Product Specifications:
| Item | Extra Thick Washer |
| Finish | Black Oxide |
| Fits Bolt Size | 5/16" |
| Flat Washer Type | Standard |
| For Screw Size | 5/16" |
| Hardness | Rockwell C4 |
| Inside Dia. | 0.344" , 11/32" |
| Inside Dia. Tolerance | -0.01" to +0.01" |
| Material | Steel |
| Material Grade/class | Case Hardened |
| Max. Thickness | 0.193" |
| Min. Thickness | 0.167" |
| Outside Dia. | 3/4" |
| Outside Dia. Tolerance | -0.01" to +0.01" |
| Rockwell Hardness | C4 |
| System Of Measurement | Imperial |
| Thickness | 3/16" |
| Thickness Tolerance | -0.02" to +0.005" |
| Washer Type | Standard Washer |
Shipping Info:
| Ship weight (kg) | 0.08 |
| Ship height (cm) | 1.27 |
| Ship length (cm) | 7.62 |
| Ship width (cm) | 3.81 |
| HS code | 7318220000 |
| Country of Origin | US |
Product Variants
| Product | Model | Fits Bolt Size | Thickness | Min. Thickness | Max. Thickness | For Screw Size | Material Grade/class | Thickness Tolerance | Inside Dia. Tolerance | Pkg. Qty. | Price | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
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5KEF4 | M30 | 5 mm | 5 mm | 5 mm | M30 | Through Hardened | -0.6 mm to +0.6 mm | - | 1 | €1.99 | |
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5KEF6 | M36 | 6 mm | 6 mm | 6 mm | M36 | Through Hardened | -0.6 mm to +0.6 mm | - | 1 | €3.52 | |
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5KEG0 | M48 | 8 mm | 8 Mm | 8 mm | M48 | Through Hardened | -0.8 mm to +0.8 mm | - | 1 | €11.62 | |
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Z8803 | M3 | 2 mm | 2 mm | 2 mm | M3 | Case Hardened | -0.5 mm to +0.4 mm | -0.01" to +0.01" | 25 | €22.83 | |
![]() |
Z8804 | M4 | 2 mm | 2 mm | 2 mm | M4 | Case Hardened | -0.5 mm to +0.4 mm | -0.01" to +0.01" | 25 | €24.26 | |
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Z8805 | M5 | 2 mm | 2 mm | 2 mm | M5 | Case Hardened | -0.5 mm to +0.4 mm | -0.01" to +0.01" | 10 | €11.15 | |
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Z8806 | M6 | 2.5 mm | 2.5 mm | 2.5 mm | M6 | Case Hardened | -0.5 mm to +0.4 mm | -0.01" to +0.01" | 10 | €11.26 |
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APPROVED VENDOR Z9201 Extra Thick Washer, 5/16 In Fits Bolt Size, Std, 11/32 In I.D., Steel
€10.19 /pack







