The Washer,spring Tension, cataloged under National Stock Number 5310-01-335-2950, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Buena Park Tool & Engineering, Inc Dba Buena Park Tool. Government technical data includes 8 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5310-01-335-2950 |
| Primary Part Number | 13D0021-054 |
| Item Name | Washer,spring Tension |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Buena Park Tool & Engineering, Inc Dba Buena Park Tool |
| Status | ACTIVE |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Style Designator | SPRING TENSION |
| Material Document and Classification | MIL-S-5059,COND A MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 0.600 INCHES NOMINAL IN |
| Material Thickness | 0.032 INCHES NOMINAL IN |
| Surface Treatment | PASSIVATE OVERALL |
| Material | STEEL COMP 301 OVERALL |
| Hole Diameter | 0.375 INCHES MINIMUM AND 0.385 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 | N |
| Part Number | Manufacturer |
|---|---|
| 13D0021-054 PRIMARY | Buena Park Tool & Engineering, Inc Dba Buena Park Tool (USA) |
| 13D0021-054 PRIMARY | Am Machining, Inc. Dba Am Machining Inc Div Apv Manufacturing & Engineering Co. (USA) |
| 13D0021-054 PRIMARY | Woodruff Corporation (USA) |
| 13D0021-054 PRIMARY | American Metals & Machining (USA) |
| Reference | Meaning |
|---|---|
| 13D0021-054 | 5/2 Secondary reference U.S. Government activity |
| 13D0021-054 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5310-01-335-2950 is a Washer,spring Tension, manufactured by Buena Park Tool & Engineering, Inc Dba Buena Park Tool, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-335-2950 has 4 manufacturer part numbers on file: 13D0021-054 (Buena Park Tool & Engineering, Inc Dba Buena Park Tool), 13D0021-054 (Am Machining, Inc. Dba Am Machining Inc Div Apv Manufacturing & Engineering Co.), 13D0021-054 (Woodruff Corporation), 13D0021-054 (American Metals & Machining).
Key specifications for 13D0021-054: Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Style Designator: SPRING TENSION; Material Document and Classification: MIL-S-5059,COND A MIL SPEC SINGLE MATERIAL RESPONSE OVERALL; Outside Diameter: 0.600 INCHES NOMINAL IN. 8 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.