The Washer,key, cataloged under National Stock Number 5310-01-184-3786, 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 10 specifications, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-184-3786 |
| Primary Part Number | 4M248-1 |
| Item Name | Washer,key |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Wire Hole Diameter | 0.070 INCHES MINIMUM AND 0.075 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | MIL-C-5541,TY 2,CL 1A MIL SPEC SINGLE TREATMENT RESPONSE OVERALL A |
| Overall Distance Including Keys | 1.470 INCHES MINIMUM AND 1.570 INCHES MAXIMUM IN |
| Material Document and Classification | QQ-A-250/4,T4 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 1.200 INCHES NOMINAL IN |
| Material Thickness | 0.063 INCHES NOMINAL IN |
| Tapered Key Minor Width | 0.120 INCHES NOMINAL IN |
| Surface Treatment | CHROMATE OVERALL |
| Material | ALUMINUM ALLOY 2024 OVERALL |
| Hole Diameter | 0.785 INCHES MINIMUM AND 0.800 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 |
|---|---|
| 4M248-1 | Anillo Industries Llc (USA) |
| 4M248-1 | Tect Hypervelocity, Inc. (USA) |
| 4M248-1 PRIMARY | The Boeing Company Div Defense (USA) |
| 4M248-1 | All Power Manufacturing Co. (USA) |
| Reference | Meaning |
|---|---|
| M4248-1 | 5/2 Secondary reference U.S. Government activity |
| 4M248-1 | 5/9 Secondary reference Pioneer Machine Products Inc. |
NSN 5310-01-184-3786 is a Washer,key, manufactured by The Boeing Company Div Defense, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-184-3786 has 4 manufacturer part numbers on file: 4M248-1 (Anillo Industries Llc), 4M248-1 (Tect Hypervelocity, Inc.), 4M248-1 (The Boeing Company Div Defense), 4M248-1 (All Power Manufacturing Co.).
Key specifications for 4M248-1: Wire Hole Diameter: 0.070 INCHES MINIMUM AND 0.075 INCHES MAXIMUM IN; Surface Treatment Document and Classification: MIL-C-5541,TY 2,CL 1A MIL SPEC SINGLE TREATMENT RESPONSE OVERALL A; Overall Distance Including Keys: 1.470 INCHES MINIMUM AND 1.570 INCHES MAXIMUM IN; Material Document and Classification: QQ-A-250/4,T4 FED SPEC SINGLE MATERIAL RESPONSE OVERALL. 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.