The Washer,flat, cataloged under National Stock Number 5310-01-040-4741, 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 8 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5310-01-040-4741 |
| Primary Part Number | GW10U5AA34 |
| 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 MIL SPEC 2ND TREATMENT RESPONSE OR MIL-P-23377 MIL SPEC 3RD TREATMENT RESPONSE OVERALL A |
| Overall Diameter | 0.490 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN |
| Material Document and Classification | QQ-A-250/3 T6 FED SPEC SINGLE MATERIAL RESPONSE OR QQ-A-225/6 T6 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Surface Treatment | ANODIZE OR CHROMATE OR PRIMER OVERALL |
| Peripheral Shape Style | ROUND |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.118 INCHES MINIMUM AND 0.138 INCHES MAXIMUM IN |
| Thickness | 0.053 INCHES MINIMUM AND 0.073 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 |
| Part Number | Manufacturer |
|---|---|
| GW10U5AA34 PRIMARY | Northrop Grumman Systems Corporation (USA) |
| Reference | Meaning |
|---|---|
| GW10U4AA3 | C/1 Advisory reference — outside the item-of-supply concept Northrop Grumman Systems Corporation |
NSN 5310-01-040-4741 is a Washer,flat, manufactured by Northrop Grumman Systems Corporation, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-040-4741 has 1 manufacturer part number on file: GW10U5AA34 (Northrop Grumman Systems Corporation).
Key specifications for GW10U5AA34: Surface Treatment Document and Classification: MIL-A-8625 TY 2 CL 1 MIL SPEC 1ST TREATMENT RESPONSE OR MIL-C-5541 CL 1A MIL SPEC 2ND TREATMENT RESPONSE OR MIL-P-23377 MIL SPEC 3RD TREATMENT RESPONSE OVERALL A; Overall Diameter: 0.490 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN; Material Document and Classification: QQ-A-250/3 T6 FED SPEC SINGLE MATERIAL RESPONSE OR QQ-A-225/6 T6 FED SPEC SINGLE MATERIAL RESPONSE OVERALL; Surface Treatment: ANODIZE OR CHROMATE OR PRIMER 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.