The Washer,spring Tension, cataloged under National Stock Number 5310-01-341-7527, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is American Metals & Machining. Government technical data includes 6 specifications, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-341-7527 |
| Primary Part Number | 13D0021-056 |
| Item Name | Washer,spring Tension |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | American Metals & Machining |
| Status | ACTIVE |
| Style Designator | SPRING TENSION |
| Outside Diameter | 0.500 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN |
| Material Thickness | 0.040 INCHES NOMINAL IN |
| Surface Treatment | PASSIVATE OVERALL |
| Material | STEEL COMP 301 OVERALL |
| Hole Diameter | 0.345 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | N |
| Part Number | Manufacturer |
|---|---|
| 13D0021-056 PRIMARY | American Metals & Machining (USA) |
| 13D0021-056 PRIMARY | Buena Park Tool & Engineering, Inc Dba Buena Park Tool (USA) |
| 13D0021-056 PRIMARY | Woodruff Corporation (USA) |
| 13D0021-056 PRIMARY | Am Machining, Inc. Dba Am Machining Inc Div Apv Manufacturing & Engineering Co. (USA) |
| Reference | Meaning |
|---|---|
| 13D0021-056 | 5/2 Secondary reference U.S. Government activity |
| 13D0021-056 | 5/9 Secondary reference Reid Products Inc. Dba Reid Products Inc |
NSN 5310-01-341-7527 is a Washer,spring Tension, manufactured by American Metals & Machining, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-341-7527 has 4 manufacturer part numbers on file: 13D0021-056 (American Metals & Machining), 13D0021-056 (Buena Park Tool & Engineering, Inc Dba Buena Park Tool), 13D0021-056 (Woodruff Corporation), 13D0021-056 (Am Machining, Inc. Dba Am Machining Inc Div Apv Manufacturing & Engineering Co.).
Key specifications for 13D0021-056: Style Designator: SPRING TENSION; Outside Diameter: 0.500 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN; Material Thickness: 0.040 INCHES NOMINAL IN; Surface Treatment: PASSIVATE OVERALL. 6 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.