The Washer,lock, cataloged under National Stock Number 5310-01-443-0327, 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8 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-443-0327 |
| Item Name | Washer,lock |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Surface Treatment Document and Classification | MIL-T-10727 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Style Designator | FLAT INTERNAL TEETH |
| Material Document and Classification | ASTM-B-591 425 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 0.278 INCHES MINIMUM AND 0.288 INCHES MAXIMUM IN |
| Material Thickness | 0.031 INCHES NOMINAL IN |
| Surface Treatment | TIN OVERALL |
| Material | COPPER ALLOY 425 OVERALL |
| Hole Diameter | 0.165 INCHES MINIMUM AND 0.169 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 |
|---|---|
| M-8118 | 3/9 Design control — primary reference Metuchen Capacitors Inc. |
| 758-117-001 | 7/2 Vendor item drawing reference Parker-Hannifin Corporation Dba Service and Support Operation Div Services and Support Operations |
| 758-117-001 | 5/9 Secondary reference Parker-Hannifin Corporation Dba Pneutronics Div Fluid Systems Division |
NSN 5310-01-443-0327 is a Washer,lock, classified under FSC 5310, Nuts and Washers. Status: active.
Key specifications for 5310-01-443-0327: Surface Treatment Document and Classification: MIL-T-10727 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL; Style Designator: FLAT INTERNAL TEETH; Material Document and Classification: ASTM-B-591 425 ASSN STD SINGLE MATERIAL RESPONSE OVERALL; Outside Diameter: 0.278 INCHES MINIMUM AND 0.288 INCHES MAXIMUM 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.