The Washer,flat, cataloged under National Stock Number 5310-00-515-9903, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Northrop Grumman Systems Corporation. 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-515-9903 |
| Primary Part Number | GW10U80AA3 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Northrop Grumman Systems Corporation |
| Status | ACTIVE |
| Surface Treatment Document and Classification | MIL-A-8625 TY 2 CL 1 MIL SPEC 1ST TREATMENT RESPONSE OR MIL-C-5541 CL 1A OR 3 MIL SPEC 2ND TREATMENT RESPONSE OVERALL A |
| Overall Diameter | 1.375 INCHES NOMINAL IN |
| Material Document and Classification | QQ-A-250/3 FED SPEC 1ST MATERIAL RESPONSE OR QQ-A-225/4 MIL SPEC 2ND MATERIAL RESPONSE OVERALL |
| Cross-Sectional Shape Style | RECTANGULAR |
| Surface Treatment | ANODIZE OR CHROMATE OVERALL |
| Peripheral Shape Style | ROUND |
| Material | ALUMINUM ALLOY 2014 OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 1.000 INCHES NOMINAL IN |
| Thickness | 0.064 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 |
|---|---|
| GW10U80AA3 PRIMARY | Northrop Grumman Systems Corporation (USA) |
| SP4300-64 PRIMARY | Northrop Grumman Systems Corporation (USA) |
NSN 5310-00-515-9903 is a Washer,flat, manufactured by Northrop Grumman Systems Corporation, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-515-9903 has 2 manufacturer part numbers on file: GW10U80AA3 (Northrop Grumman Systems Corporation), SP4300-64 (Northrop Grumman Systems Corporation).
Key specifications for GW10U80AA3: Surface Treatment Document and Classification: MIL-A-8625 TY 2 CL 1 MIL SPEC 1ST TREATMENT RESPONSE OR MIL-C-5541 CL 1A OR 3 MIL SPEC 2ND TREATMENT RESPONSE OVERALL A; Overall Diameter: 1.375 INCHES NOMINAL IN; Material Document and Classification: QQ-A-250/3 FED SPEC 1ST MATERIAL RESPONSE OR QQ-A-225/4 MIL SPEC 2ND 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.