The Washer,flat, cataloged under National Stock Number 5310-01-441-5564, 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 8 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-441-5564 |
| Primary Part Number | 211068930 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Overall Diameter | 1.310 INCHES NOMINAL IN |
| Material Document and Classification | QQ-N-286 FED SPEC ALL MATERIAL RESPONSES OVERALL |
| Cross-Sectional Shape Style | RECTANGULAR |
| Peripheral Shape Style | ROUND |
| Material | NICKEL ALLOY K-500 OR NICKEL ALLOY 502 OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.938 INCHES NOMINAL IN |
| Thickness | 0.062 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 |
|---|---|
| 595-6401090 ITEM 26 | Naval Sea Systems Command (USA) |
| 595-6401378 ITEM 1 | Naval Sea Systems Command (USA) |
| 211068930 PRIMARY | Naval Sea Systems Command (USA) |
NSN 5310-01-441-5564 is a Washer,flat, manufactured by Naval Sea Systems Command, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-441-5564 has 3 manufacturer part numbers on file: 595-6401090 ITEM 26 (Naval Sea Systems Command), 595-6401378 ITEM 1 (Naval Sea Systems Command), 211068930 (Naval Sea Systems Command).
Key specifications for 211068930: Overall Diameter: 1.310 INCHES NOMINAL IN; Material Document and Classification: QQ-N-286 FED SPEC ALL MATERIAL RESPONSES OVERALL; Cross-Sectional Shape Style: RECTANGULAR; 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.