The Washer,flat, cataloged under National Stock Number 5310-01-294-9443, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is The Boeing Company Div Defense. Government technical data includes 11 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 | 5310-01-294-9443 |
| Primary Part Number | 4M307-2-22 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Surface Treatment Document and Classification | MIL-C-5541,CLASS 3 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Overall Diameter | 1.224 INCHES MINIMUM AND 1.244 INCHES MAXIMUM IN |
| Supplementary Features | USED WITH ST7M349 AND9M919 SEALS,CAGEC 76301 |
| Material Document and Classification | QQ-A-250/11,T6 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Cross-Sectional Shape Style | RECTANGULAR |
| Surface Treatment | CHROMATE OVERALL |
| Peripheral Shape Style | ROUND |
| Material | ALUMINUM ALLOY 6061 OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.334 INCHES MINIMUM AND 0.354 INCHES MAXIMUM IN |
| Thickness | 0.023 INCHES MINIMUM AND 0.027 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 |
|---|---|
| 4M307-2-22 PRIMARY | The Boeing Company Div Defense (USA) |
| 4M307-2-22 PRIMARY | Trico Manufacturing Inc. (USA) |
NSN 5310-01-294-9443 is a Washer,flat, manufactured by The Boeing Company Div Defense, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-294-9443 has 2 manufacturer part numbers on file: 4M307-2-22 (The Boeing Company Div Defense), 4M307-2-22 (Trico Manufacturing Inc.).
Key specifications for 4M307-2-22: Surface Treatment Document and Classification: MIL-C-5541,CLASS 3 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL; Overall Diameter: 1.224 INCHES MINIMUM AND 1.244 INCHES MAXIMUM IN; Supplementary Features: USED WITH ST7M349 AND9M919 SEALS,CAGEC 76301; Material Document and Classification: QQ-A-250/11,T6 FED SPEC SINGLE MATERIAL RESPONSE OVERALL. 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.