A20531-1
View detailed technical data, stock status, and sourcing information for: A20531-1
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A washer having a centrally located hole with a solid or laminated cross-section and two flat parallel bearing surfaces. The hole must be 75 percent or less than the largest dimension and the bearing surface finish is greater than 32 microinch (0.8 micrometer). The thickness cannot exceed 25 percent of the largest outside dimension. When the largest outside dimension is less than 1/4 inch or 6mm, the thickness must be 0.006 inches (0.15mm) or greater and for items 1/4 inch (6mm) or larger, the thickness must be 0.016 inches (0.4mm) or greater. The maximum tolerance is applied to dimensions and used as a determining factor. Items with separable lamination use shim. For items fabricated from ceramic or electrically rated materials by specification or industry standards use insulator (1), washer. Excludes:disk, valve, graphite impregnated and lubricated items.
0.190 inches minimum and 0.195 inches maximum hole diameter, rectangular cross-sectional shape style, 0.027 inches minimum and 0.037 inches maximum thickness, round peripheral shape style, round center hole shape style
Product Characteristics
Below you’ll find the complete technical specifications and performance data for this part, including material details and compliance information.
- Cross-Sectional Shape Style
- rectangular
- Hole Diameter
- 0.190 inches minimum and 0.195 inches maximum
- Peripheral Shape Style
- round
- Center Hole Shape Style
- round
- Thickness
- 0.027 inches minimum and 0.037 inches maximum
- Overall Diameter
- 0.433 inches minimum and 0.443 inches maximum
- Hardness Rating
- 82.0 rockwell b minimum and 94.0 rockwell b maximum
- Material
- steel comp 302 overall
- Material Document And Classification
- qq-s-766 fed spec single material response overall
- Surface Treatment
- oxide film overall
Replaces National Stock Numbers
Below is a list of NSNs that have been officially superseded by this NSN:
| NSN | Name | Date |
|---|---|---|
| 5310-00-136-7819 | No Name Available | 01/01/1983 |
| 5310-00-205-8081 | No Name Available | 06/01/1992 |
| 5310-00-449-2388 | No Name Available | 01/01/1983 |
Related Parts
This NSN group includes multiple components designed to meet specific performance and operational standards. Each listing provides detailed specs, functionality data, and replacement compatibility information:
| Part Number | Name |
|---|---|
| A20531-1 | Flat Washer |
FAQs
Find helpful answers about installation, operation, maintenance, compliance, and troubleshooting.
What is the FSCG of the NSN 5310-00-045-9225?
Does the NSN 5310-00-045-9225 have a Schedule B code assigned?
Does NSN 5310-00-045-9225 require demilitarization?
Does NSN 5310-00-045-9225 contain precious materials?
Does NSN 5310-00-045-9225 contain hazardous materials?
When the NSN 5310-00-045-9225 was assigned to the Federal Catalog?
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Pricing
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