The Washer,shouldered, cataloged under National Stock Number 5310-01-415-2742, 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 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-415-2742 |
| Primary Part Number | 6406591-MPAD-A28 SHTS 1THRU4,38 |
| Item Name | Washer,shouldered |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Shoulder Height | 0.090 INCHES NOMINAL IN |
| Style Designator | SHOULDERED |
| Material Document and Classification | QQ-S-763, COND A FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 1.750 INCHES NOMINAL IN |
| Shoulder Diameter | 1.560 INCHES NOMINAL IN |
| Material | STEEL COMP 304 OVERALL |
| Hole Diameter | 0.520 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 |
|---|---|
| 6406591-MPAD-A28 SHTS 1THRU4,38 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 211084530 | 5/9 Secondary reference Naval Sea Systems Command |
| 556-6406591-MPAD-A28 | 5/9 Secondary reference Naval Sea Systems Command |
| 218015976 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
NSN 5310-01-415-2742 is a Washer,shouldered, manufactured by Naval Sea Systems Command, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-415-2742 has 1 manufacturer part number on file: 6406591-MPAD-A28 SHTS 1THRU4,38 (Naval Sea Systems Command).
Key specifications for 6406591-MPAD-A28 SHTS 1THRU4,38: Overall Height: 0.250 INCHES NOMINAL IN; Shoulder Height: 0.090 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.