The Washer,flat, cataloged under National Stock Number 5310-01-376-4776, 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 Lockheed Martin Information Systems & Global Solutions. Government technical data includes 9 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 | 5310-01-376-4776 |
| Primary Part Number | C005280-01 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Lockheed Martin Corporation Div Lockheed Martin Information Systems & Global Solutions |
| Status | ACTIVE |
| Overall Diameter | 0.375 INCHES NOMINAL IN |
| Material Document and Classification | AMS 5640 ASSN STD 1ST MATERIAL RESPONSE OR ASTM A582,COND A/B ASSN STD 2ND MATERIAL RESPONSE OVERALL |
| Cross-Sectional Shape Style | RECTANGULAR |
| Surface Treatment | PASSIVATE OVERALL |
| Peripheral Shape Style | ROUND |
| Material | STEEL COMP 303 OR STEEL COMP 303SE OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.156 INCHES MINIMUM AND 0.176 INCHES MAXIMUM IN |
| Thickness | 0.031 INCHES MINIMUM AND 0.041 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 |
|---|---|
| C005280-01 PRIMARY | Lockheed Martin Corporation Div Lockheed Martin Information Systems & Global Solutions (USA) |
| C005280 PRIMARY | Lockheed Martin Corporation Div Lockheed Martin Information Systems & Global Solutions (USA) |
NSN 5310-01-376-4776 is a Washer,flat, manufactured by Lockheed Martin Corporation Div Lockheed Martin Information Systems & Global Solutions, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-376-4776 has 2 manufacturer part numbers on file: C005280-01 (Lockheed Martin Corporation Div Lockheed Martin Information Systems & Global Solutions), C005280 (Lockheed Martin Corporation Div Lockheed Martin Information Systems & Global Solutions).
Key specifications for C005280-01: Overall Diameter: 0.375 INCHES NOMINAL IN; Material Document and Classification: AMS 5640 ASSN STD 1ST MATERIAL RESPONSE OR ASTM A582,COND A/B ASSN STD 2ND MATERIAL RESPONSE OVERALL; Cross-Sectional Shape Style: RECTANGULAR; Surface Treatment: PASSIVATE OVERALL. 9 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.