The Washer,flat, cataloged under National Stock Number 5310-01-043-6917, 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 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5310-01-043-6917 |
| Primary Part Number | 4912549-09 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Northrop Grumman Systems Corporation |
| Status | ACTIVE |
| Surface Treatment Document and Classification | QQ-P-416 TY 2 CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Overall Diameter | 0.495 INCHES MINIMUM AND 0.515 INCHES MAXIMUM IN |
| Material Document and Classification | QQ-B-613 COND HALF HARD FED SPEC SINGLE MATERIAL RESPONSE OR QQ-B-626 COND HALF HARD FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Cross-Sectional Shape Style | RECTANGULAR |
| Surface Treatment | CADMIUM OVERALL |
| Peripheral Shape Style | ROUND |
| Material | COPPER ALLOY 268 OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.214 INCHES MINIMUM AND 0.227 INCHES MAXIMUM IN |
| Thickness | 0.036 INCHES MINIMUM AND 0.065 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 |
|---|---|
| 4912549-09 PRIMARY | Northrop Grumman Systems Corporation (USA) |
| Reference | Meaning |
|---|---|
| 4912549-09 | 5/9 Secondary reference U.S. Government activity |
NSN 5310-01-043-6917 is a Washer,flat, manufactured by Northrop Grumman Systems Corporation, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-043-6917 has 1 manufacturer part number on file: 4912549-09 (Northrop Grumman Systems Corporation).
Key specifications for 4912549-09: Surface Treatment Document and Classification: QQ-P-416 TY 2 CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Overall Diameter: 0.495 INCHES MINIMUM AND 0.515 INCHES MAXIMUM IN; Material Document and Classification: QQ-B-613 COND HALF HARD FED SPEC SINGLE MATERIAL RESPONSE OR QQ-B-626 COND HALF HARD 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.