The Washer,flat, cataloged under National Stock Number 5310-01-128-5145, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 11 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-128-5145 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Surface Treatment Document and Classification | MIL-C-5541,CL 3 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Overall Diameter | 1.495 INCHES MINIMUM AND 1.520 INCHES MAXIMUM IN |
| Material Document and Classification | QQ-A-250/5,TEMPER T3 FED SPEC SINGLE MATERIAL RESPONSE OR QQ-A-250/5,TEMPER T4 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Cross-Sectional Shape Style | RECTANGULAR |
| Nondefinitive Spec/std Data | A TYPE AND 1 GRADE AND D CLASS |
| Surface Treatment | CHROMATE OVERALL |
| Peripheral Shape Style | ROUND |
| Material | ALUMINUM ALLOY 2024 OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.890 INCHES NOMINAL IN |
| Thickness | 0.016 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 | X |
| Reference | Meaning |
|---|---|
| FF-W-92 | 4/1 Identification reference U.S. Government activity |
| AN960JD1416L | 2/2 Government specification standardization U.S. Government activity |
| 10109490 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
NSN 5310-01-128-5145 is a Washer,flat, classified under FSC 5310, Nuts and Washers. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 5935-01-256-5608. Verify interchangeability with system specifications before substitution.
Key specifications for 5310-01-128-5145: Surface Treatment Document and Classification: MIL-C-5541,CL 3 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL; Overall Diameter: 1.495 INCHES MINIMUM AND 1.520 INCHES MAXIMUM IN; Material Document and Classification: QQ-A-250/5,TEMPER T3 FED SPEC SINGLE MATERIAL RESPONSE OR QQ-A-250/5,TEMPER T4 FED SPEC SINGLE MATERIAL RESPONSE OVERALL; Cross-Sectional Shape Style: RECTANGULAR. 11 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.