The Washer,shouldered, cataloged under National Stock Number 5310-01-417-6525, 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 7 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 | 5310-01-417-6525 |
| Primary Part Number | 556-6406597-MRFH-A25 |
| Item Name | Washer,shouldered |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Shoulder Height | 0.055 INCHES NOMINAL IN |
| Style Designator | SHOULDERED |
| Material Document and Classification | QQ-S-763 COND A FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 1.000 INCHES NOMINAL IN |
| Shoulder Diameter | 0.880 INCHES NOMINAL IN |
| Material | STEEL COMP 304 OVERALL |
| Hole Diameter | 0.323 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 |
|---|---|
| 556-6406597-MRFH-A25 PRIMARY | Naval Sea Systems Command (USA) |
| 218013534 | Naval Sea Systems Command (USA) |
NSN 5310-01-417-6525 is a Washer,shouldered, manufactured by Naval Sea Systems Command, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-417-6525 has 2 manufacturer part numbers on file: 556-6406597-MRFH-A25 (Naval Sea Systems Command), 218013534 (Naval Sea Systems Command).
Key specifications for 556-6406597-MRFH-A25: Overall Height: 0.180 INCHES NOMINAL IN; Shoulder Height: 0.055 INCHES NOMINAL IN; Style Designator: SHOULDERED; Material Document and Classification: QQ-S-763 COND A FED SPEC SINGLE MATERIAL RESPONSE OVERALL. 7 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.