5/16" Flat Washers / Type B Narrow Series / 300 Series Stainless Steel / Made in USA / DFAR Compliant
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Product Description
5/16" Flat Washers / Type B Narrow Series / 300 Series Stainless Steel / Made in USA / DFAR Compliant
Specifications
| Material | Stainless Steel |
|---|---|
| Finish | Passivated |
| Grade | 18-8 |
| Size | 5/16" |
| Point Type | Type B |
| Inside Diameter | 3/8" |
| Outside Diameter | 7/8" |
| Thickness | 0.094" |
| Standard | ASME B18.22.1 |
| RoHS Compliance | RoHS Compliant |
| Measurement System | Inch |
RoHS Compliant🇺🇸 Made in USAStainless
Frequently Asked Questions
What is the difference between USS and SAE flat washers?
USS (Type B) flat washers have larger outside diameters and are thicker than SAE (Type A) washers of the same bolt size. USS is designed for softer materials and larger load distribution. SAE is used for harder materials and standard fastener installation.
How corrosion-resistant is this stainless steel fastener?
Stainless steel fasteners resist rust and corrosion in most environments. For specific corrosion requirements, consult our engineering team or the appropriate ASTM specification.
Flat Washers / Type B Narrow Series
Family: WFBN300
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Technical Specifications
Thread Size
5/16"
Material
Stainless Steel
Grade
18-8
Thread Direction
Unthreaded
Country of Origin
DFAR Compliant
Outer Diameter
7/8"
Thickness
0.094"
SKU
31WFBN300-2000
Compliance & Certifications
DFARS Compliant
Defense Acquisition Regulations
Need documentation? Request compliance certificates