The Washer,keyway, cataloged under National Stock Number 5310-01-265-6136, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Dept of the Army U S Army Electronics Command Night Vision Laboratory. Government technical data includes 11 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-265-6136 |
| Primary Part Number | 5002551 |
| Item Name | Washer,keyway |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Dept of the Army U S Army Electronics Command Night Vision Laboratory |
| Status | ACTIVE |
| Distance From Centerline to Bottom of Internal Keyway | 0.702 INCHES MINIMUM AND 0.704 INCHES MAXIMUM IN |
| Internal Keyway Width | 0.160 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | MIL-A-8625,TY 2,CL 2 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Material Document and Classification | QQ-A-225/8,T6 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 1.480 INCHES NOMINAL IN |
| Internal Keyway Quantity | 4 |
| Material Thickness | 0.065 INCHES NOMINAL IN |
| Color | BLACK OVERALL |
| Surface Treatment | ANODIZE OVERALL |
| Material | ALUMINUM ALLOY 6061 OVERALL |
| Hole Diameter | 1.210 INCHES NOMINAL 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 |
|---|---|
| 5002551 | Bma Buizza Mazzei Agency Srl (ITA) |
| 5002551 PRIMARY | Dept of the Army U S Army Electronics Command Night Vision Laboratory (USA) |
| FEN NG 037 | Fenn Night Vision Limited (GBR) |
NSN 5310-01-265-6136 is a Washer,keyway, manufactured by Dept of the Army U S Army Electronics Command Night Vision Laboratory, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-265-6136 has 3 manufacturer part numbers on file: 5002551 (Bma Buizza Mazzei Agency Srl), 5002551 (Dept of the Army U S Army Electronics Command Night Vision Laboratory), FEN NG 037 (Fenn Night Vision Limited).
1 possible match (shared part number, not a government interchangeability claim): 6240-01-716-2847. Verify interchangeability with system specifications before substitution.
Key specifications for 5002551: Distance From Centerline to Bottom of Internal Keyway: 0.702 INCHES MINIMUM AND 0.704 INCHES MAXIMUM IN; Internal Keyway Width: 0.160 INCHES NOMINAL IN; Surface Treatment Document and Classification: MIL-A-8625,TY 2,CL 2 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL; Material Document and Classification: QQ-A-225/8,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.