The Washer,flat, cataloged under National Stock Number 5310-01-331-6296, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Communications & Power Industries Llc Dba Cpi Div Microwave Power Products Division - Eimac Operations. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-331-6296 |
| Primary Part Number | 517442N |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Communications & Power Industries Llc Dba Cpi Div Microwave Power Products Division - Eimac Operations |
| Status | ACTIVE |
| Overall Diameter | 0.290 INCHES MINIMUM AND 0.330 INCHES MAXIMUM IN |
| Cross-Sectional Shape Style | RECTANGULAR |
| Surface Treatment | NICKEL OVERALL |
| Peripheral Shape Style | ROUND |
| Material | COPPER ALLOY OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.119 INCHES MINIMUM AND 0.129 INCHES MAXIMUM IN |
| Thickness | 0.030 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 |
|---|---|
| 517442N PRIMARY | Communications & Power Industries Llc Dba Cpi Div Microwave Power Products Division - Eimac Operations (USA) |
| Reference | Meaning |
|---|---|
| J30-0002-010 | 7/2 Vendor item drawing reference L3harris Technologies, Inc. Dba Harris Corp Div Harris Defense Communications |
NSN 5310-01-331-6296 is a Washer,flat, manufactured by Communications & Power Industries Llc Dba Cpi Div Microwave Power Products Division - Eimac Operations, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-331-6296 has 1 manufacturer part number on file: 517442N (Communications & Power Industries Llc Dba Cpi Div Microwave Power Products Division - Eimac Operations).
Key specifications for 517442N: Overall Diameter: 0.290 INCHES MINIMUM AND 0.330 INCHES MAXIMUM IN; Cross-Sectional Shape Style: RECTANGULAR; Surface Treatment: NICKEL OVERALL; Peripheral Shape Style: ROUND. 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.