The Washer,recessed, cataloged under National Stock Number 5310-00-403-9801, 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 Rotary and Mission Systems. 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 | 5310-00-403-9801 |
| Primary Part Number | 6874120-1 |
| Item Name | Washer,recessed |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Lockheed Martin Corporation Div Rotary and Mission Systems |
| Status | ACTIVE |
| Style Designator | RECESSED |
| Material Document and Classification | QQ-A-225/8,ALLOY 6061 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 1.960 INCHES MINIMUM AND 1.980 INCHES MAXIMUM IN |
| Recess Depth | 0.287 INCHES NOMINAL IN |
| Material Thickness | 0.115 INCHES NOMINAL IN |
| Surface Treatment | OXIDE FILM OVERALL |
| Material | ALUMINUM ALLOY 6061 OVERALL |
| Hole Diameter | 0.315 INCHES MINIMUM AND 0.330 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 |
|---|---|
| 6874120-1 PRIMARY | Lockheed Martin Corporation Div Rotary and Mission Systems (USA) |
NSN 5310-00-403-9801 is a Washer,recessed, manufactured by Lockheed Martin Corporation Div Rotary and Mission Systems, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-403-9801 has 1 manufacturer part number on file: 6874120-1 (Lockheed Martin Corporation Div Rotary and Mission Systems).
Key specifications for 6874120-1: Overall Height: 0.380 INCHES NOMINAL IN; Style Designator: RECESSED; Material Document and Classification: QQ-A-225/8,ALLOY 6061 FED SPEC SINGLE MATERIAL RESPONSE OVERALL; Outside Diameter: 1.960 INCHES MINIMUM AND 1.980 INCHES MAXIMUM 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.