The Washer,shouldered and Recessed, cataloged under National Stock Number 5310-01-291-6617, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Lockheed Martin Corporation Div Rms - Manassas. Government technical data includes 12 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 | 5310-01-291-6617 |
| Primary Part Number | 2853631-1 |
| Item Name | Washer,shouldered and Recessed |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Lockheed Martin Corporation Div Rms - Manassas |
| Status | ACTIVE |
| Surface Treatment Document and Classification | QQ-P-35,TY2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Shoulder Height | 0.015 INCHES NOMINAL IN |
| Style Designator | SHOULDERED AND RECESSED |
| Material Document and Classification | ASTM A582,COND A ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 0.621 INCHES MINIMUM AND 0.624 INCHES MAXIMUM IN |
| Recess Depth | 0.049 INCHES NOMINAL IN |
| Material Thickness | 0.063 INCHES MINIMUM AND 0.065 INCHES MAXIMUM IN |
| Shoulder Diameter | 0.563 INCHES NOMINAL IN |
| Recess Diameter | 0.500 INCHES NOMINAL IN |
| Surface Treatment | PASSIVATE OVERALL |
| Material | STEEL COMP 303 OVERALL |
| Hole Diameter | 0.261 INCHES MINIMUM AND 0.266 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 |
|---|---|
| 2853631-1 PRIMARY | Lockheed Martin Corporation Div Rms - Manassas (USA) |
NSN 5310-01-291-6617 is a Washer,shouldered and Recessed, manufactured by Lockheed Martin Corporation Div Rms - Manassas, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-291-6617 has 1 manufacturer part number on file: 2853631-1 (Lockheed Martin Corporation Div Rms - Manassas).
Key specifications for 2853631-1: Surface Treatment Document and Classification: QQ-P-35,TY2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Shoulder Height: 0.015 INCHES NOMINAL IN; Style Designator: SHOULDERED AND RECESSED; Material Document and Classification: ASTM A582,COND A ASSN STD SINGLE MATERIAL RESPONSE OVERALL. 12 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.