The Washer,recessed, cataloged under National Stock Number 5310-01-344-2491, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Naval Sea Systems Command. 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 | 5310-01-344-2491 |
| Primary Part Number | 845-6602371 PIECE 54 |
| Item Name | Washer,recessed |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Style Designator | RECESSED |
| Material Document and Classification | QQ-N-286 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 1.240 INCHES MINIMUM AND 1.250 INCHES MAXIMUM IN |
| Material Thickness | 0.380 INCHES NOMINAL IN |
| Recess Diameter | 0.840 INCHES NOMINAL IN |
| Material | NICKEL ALLOY 502 OVERALL |
| Hole Diameter | 0.780 INCHES NOMINAL IN |
| Recess Angle | 45.0 DEGREES NOMINAL |
| 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 |
|---|---|
| 845-6602371 PIECE 54 PRIMARY | Naval Sea Systems Command (USA) |
NSN 5310-01-344-2491 is a Washer,recessed, manufactured by Naval Sea Systems Command, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-344-2491 has 1 manufacturer part number on file: 845-6602371 PIECE 54 (Naval Sea Systems Command).
Key specifications for 845-6602371 PIECE 54: Style Designator: RECESSED; Material Document and Classification: QQ-N-286 FED SPEC SINGLE MATERIAL RESPONSE OVERALL; Outside Diameter: 1.240 INCHES MINIMUM AND 1.250 INCHES MAXIMUM IN; Material Thickness: 0.380 INCHES NOMINAL 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.