The Washer,flat, cataloged under National Stock Number 5310-01-640-7772, 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 7 specifications, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-640-7772 |
| Primary Part Number | 782-7666820 ITEM 16 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Overall Diameter | 2.500 INCHES NOMINAL IN |
| Cross-Sectional Shape Style | RECTANGULAR |
| Peripheral Shape Style | ROUND |
| Material | COPPER ALLOY 464 OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 1.031 INCHES NOMINAL IN |
| Thickness | 0.063 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 |
|---|---|
| 572-8200791 ITEM 16 | Naval Sea Systems Command (USA) |
| 782-7666820 ITEM 16 PRIMARY | Naval Sea Systems Command (USA) |
| 572-7666820 ITEM 16 | Naval Sea Systems Command (USA) |
| 782-7666819 ITEM 16 | Naval Sea Systems Command (USA) |
NSN 5310-01-640-7772 is a Washer,flat, manufactured by Naval Sea Systems Command, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-640-7772 has 4 manufacturer part numbers on file: 572-8200791 ITEM 16 (Naval Sea Systems Command), 782-7666820 ITEM 16 (Naval Sea Systems Command), 572-7666820 ITEM 16 (Naval Sea Systems Command), 782-7666819 ITEM 16 (Naval Sea Systems Command).
Key specifications for 782-7666820 ITEM 16: Overall Diameter: 2.500 INCHES NOMINAL IN; Cross-Sectional Shape Style: RECTANGULAR; Peripheral Shape Style: ROUND; End Item Identification: HATCH, COVER. 7 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.