The Washer,spring Tension, cataloged under National Stock Number 5310-01-312-1059, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 8 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 5 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-312-1059 |
| Item Name | Washer,spring Tension |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Surface Treatment Document and Classification | ASTM A380 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Style Designator | SPRING TENSION |
| Material Document and Classification | MIL-S-5059 1/2H MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 0.715 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN |
| Material Thickness | 0.038 INCHES MINIMUM AND 0.042 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Material | STEEL COMP 302 OVERALL |
| Hole Diameter | 0.380 INCHES MINIMUM AND 0.415 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 |
| Reference | Meaning |
|---|---|
| M12133/2-380 | 2/2 Government specification standardization U.S. Government activity |
| MIL-W-12133/2 | 4/1 Identification reference U.S. Government activity |
NSN 5310-01-312-1059 is a Washer,spring Tension, classified under FSC 5310, Nuts and Washers. Status: active.
5 possible matches (shared part number, not a government interchangeability claim): 5310-01-330-8301, 5310-01-343-6011, 5310-01-345-8534. Verify interchangeability with system specifications before substitution.
Key specifications for 5310-01-312-1059: Overall Height: 0.052 INCHES MINIMUM AND 0.066 INCHES MAXIMUM IN; Surface Treatment Document and Classification: ASTM A380 ASSN STD SINGLE TREATMENT RESPONSE OVERALL; Style Designator: SPRING TENSION; Material Document and Classification: MIL-S-5059 1/2H MIL SPEC SINGLE MATERIAL RESPONSE OVERALL. 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.