The Washer,spring Tension, cataloged under National Stock Number 5310-01-326-4941, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Woodruff Corporation. Government technical data includes 7 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-326-4941 |
| Primary Part Number | 13D0021-052 |
| Item Name | Washer,spring Tension |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Woodruff Corporation |
| Status | ACTIVE |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Material Document and Classification | MIL-S-5009 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 0.480 INCHES NOMINAL IN |
| Material Thickness | 0.032 INCHES NOMINAL IN |
| Surface Treatment | PASSIVATE OVERALL |
| Material | STEEL COMP 301 OVERALL |
| Hole Diameter | 0.260 INCHES MAXIMUM IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 13D0021-052 | Woodruff Corporation (USA) |
| 13D0021-052 | Am Machining, Inc. Dba Am Machining Inc Div Apv Manufacturing & Engineering Co. (USA) |
| 13D0021-052 | American Metals & Machining (USA) |
| 13D0021-052 | Buena Park Tool & Engineering, Inc Dba Buena Park Tool (USA) |
| Reference | Meaning |
|---|---|
| 13D0021-052 | 5/9 Secondary reference Reid Products Inc. Dba Reid Products Inc |
| 13D0021-052 | 3/2 Design control — primary reference U.S. Government activity |
| 13D0021-052 | 5/2 Secondary reference U.S. Government activity |
NSN 5310-01-326-4941 is a Washer,spring Tension, manufactured by Woodruff Corporation, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-326-4941 has 4 manufacturer part numbers on file: 13D0021-052 (Woodruff Corporation), 13D0021-052 (Am Machining, Inc. Dba Am Machining Inc Div Apv Manufacturing & Engineering Co.), 13D0021-052 (American Metals & Machining), 13D0021-052 (Buena Park Tool & Engineering, Inc Dba Buena Park Tool).
Key specifications for 13D0021-052: Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Material Document and Classification: MIL-S-5009 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL; Outside Diameter: 0.480 INCHES NOMINAL IN; Material Thickness: 0.032 INCHES NOMINAL IN. 7 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.