NSN 5310-01-257-8616 5218311, 521831-1, 01-257-8616
Product Details | FLAT WASHER
5310-01-257-8616 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.
Part Alternates: 5218311, 521831-1, 5310-01-257-8616, 01-257-8616, 5310012578616, 012578616
Hardware and Abrasives | Nuts and Washers
| Supply Group (FSG) | NSN Assign. | NIIN | Item Name Code (INC) |
|---|---|---|---|
| 53 | 25 JUN 1987 | 01-257-8616 | 13393 ( WASHER, FLAT ) |
Drawings & Photos | NSN 5310-01-257-8616
Cross Reference | NSN 5310-01-257-8616
| Part Number | Cage Code | Manufacturer |
|---|---|---|
| 521831-1 | 99479 | BOWMAR, LLC |
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Technical Data | NSN 5310-01-257-8616
| Characteristic | Specifications |
|---|---|
| MATERIAL | STEEL COMP 416 OVERALL |
| SURFACE TREATMENT | PASSIVATE OVERALL |
| HARDNESS RATING | 26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM |
| HOLE DIAMETER | 0.502 INCHES MINIMUM AND 0.503 INCHES MAXIMUM |
| PERIPHERAL SHAPE STYLE | 1 ROUND |
| OVERALL DIAMETER | 0.7507 INCHES MINIMUM AND 0.7512 INCHES MAXIMUM |
| CENTER HOLE SHAPE STYLE | 1 ROUND |
| CROSS-SECTIONAL SHAPE STYLE | 6 RECTANGULAR |
| OUTSIDE LEFT CORNER CHAMFER ANGLE | 45.0 DEGREES NOMINAL |
| OUTSIDE RIGHT CORNER CHAMFER ANGLE | 45.0 DEGREES NOMINAL |
| INSIDE LEFT CORNER CHAMFER ANGLE | 90.0 DEGREES NOMINAL |
| INSIDE RIGHT CORNER CHAMFER ANGLE | 90.0 DEGREES NOMINAL |
| MANUFACTURERS CODE | 99479 |
| DESIGN CONTROL REFERENCE | 521831-1 |
Restrictions/Controls & Freight Information | NSN 5310-01-257-8616
| Category | Code | Description |
|---|---|---|
| Hazardous Material Indicator Code | N | There is no data in the HMIS and the NSN is in an FSC not generally suspected of containing hazardous materials |
| Demilitarization Code: | A | Non-Munitions List Item/ Non-Strategic List Item - Demilitarization not required. |
| Precious Metals Indicator Code: | U | Precious metal type is unknown |
| Criticality Code: | X | The item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application. |
| Category | Code | Description |
|---|---|---|
| No Freight Information | ||