The Washer,convex, cataloged under National Stock Number 5310-01-031-7135, 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 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-031-7135 |
| Primary Part Number | 4M118D6 |
| Item Name | Washer,convex |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Surface Treatment Document and Classification | MIL-A-8625 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Style Designator | CONVEX |
| Material Document and Classification | QQ-A-225/6,TEMPER T4 FED SPEC SINGLE MATERIAL RESPONSE OR QQ-A-225/6,TEMPER T351 FED SPEC SINGLE MATERIAL RESPONSE OR QQ-A-200/3 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 0.349 INCHES MINIMUM AND 0.357 INCHES MAXIMUM IN |
| Material Thickness | 0.070 INCHES NOMINAL IN |
| Surface Treatment | ANODIZE OVERALL |
| Material | ALUMINUM ALLOY 2024 OVERALL |
| Hole Diameter | 0.190 INCHES MINIMUM AND 0.194 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 |
|---|---|
| 4M118D6 PRIMARY | The Boeing Company Div Defense (USA) |
NSN 5310-01-031-7135 is a Washer,convex, manufactured by The Boeing Company Div Defense, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-031-7135 has 1 manufacturer part number on file: 4M118D6 (The Boeing Company Div Defense).
Key specifications for 4M118D6: Surface Treatment Document and Classification: MIL-A-8625 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL; Style Designator: CONVEX; Material Document and Classification: QQ-A-225/6,TEMPER T4 FED SPEC SINGLE MATERIAL RESPONSE OR QQ-A-225/6,TEMPER T351 FED SPEC SINGLE MATERIAL RESPONSE OR QQ-A-200/3 FED SPEC SINGLE MATERIAL RESPONSE OVERALL; Outside Diameter: 0.349 INCHES MINIMUM AND 0.357 INCHES MAXIMUM IN. 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.