The Washer,flat, cataloged under National Stock Number 5310-01-321-2159, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 10 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-321-2159 |
| Primary Part Number | 5750388-053 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Surface Treatment Document and Classification | MIL-A-8625 MIL SPEC 1ST TREATMENT RESPONSE OR MIL-C-5541,CL 1A MIL SPEC 2ND TREATMENT RESPONSE OVERALL A |
| Overall Diameter | 1.500 INCHES NOMINAL IN |
| Material Document and Classification | QQ-A-250/11,T6 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Cross-Sectional Shape Style | RECTANGULAR |
| Surface Treatment | ANODIZE OR CHROMATE OVERALL |
| Peripheral Shape Style | ROUND |
| Material | ALUMINUM ALLOY 6061 OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.257 INCHES MINIMUM AND 0.265 INCHES MAXIMUM IN |
| Thickness | 0.125 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 |
| Part Number | Manufacturer |
|---|---|
| 5750388-053 PRIMARY | Naval Sea Systems Command (USA) |
| 119-5750388-053 | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 5750388-053 | 5/9 Secondary reference Textron Systems Corp |
NSN 5310-01-321-2159 is a Washer,flat, manufactured by Naval Sea Systems Command, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-321-2159 has 2 manufacturer part numbers on file: 5750388-053 (Naval Sea Systems Command), 119-5750388-053 (Naval Sea Systems Command).
Key specifications for 5750388-053: Surface Treatment Document and Classification: MIL-A-8625 MIL SPEC 1ST TREATMENT RESPONSE OR MIL-C-5541,CL 1A MIL SPEC 2ND TREATMENT RESPONSE OVERALL A; Overall Diameter: 1.500 INCHES NOMINAL IN; Material Document and Classification: QQ-A-250/11,T6 FED SPEC SINGLE MATERIAL RESPONSE OVERALL; Cross-Sectional Shape Style: RECTANGULAR. 10 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.