The Washer,flat, cataloged under National Stock Number 5310-01-202-1778, 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 3 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-202-1778 |
| Primary Part Number | 5519297 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Overall Diameter | 38.0 MILLIMETERS NOMINAL MM |
| Hole Diameter | 26.0 MILLIMETERS NOMINAL MM |
| Thickness | 4.0 MILLIMETERS NOMINAL MM |
| 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 |
|---|---|
| 5519297 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 5310PL0919710 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| 1376-16-256 | 5/9 Secondary reference Bae Systems Land & Armaments L.p. |
NSN 5310-01-202-1778 is a Washer,flat, manufactured by Naval Sea Systems Command, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-202-1778 has 1 manufacturer part number on file: 5519297 (Naval Sea Systems Command).
Key specifications for 5519297: Overall Diameter: 38.0 MILLIMETERS NOMINAL MM; Hole Diameter: 26.0 MILLIMETERS NOMINAL MM; Thickness: 4.0 MILLIMETERS NOMINAL MM. 3 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.