The Washer,flat, cataloged under National Stock Number 5310-01-657-0102, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Spectra Precision. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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.
| Item Name | Washer,flat |
| FSC / FSG | 5310 — Nuts and Washers (FSG 53) |
| Manufacturers | Spectra Precision (CAGE 67ZZ8) |
| Parameter | Value |
|---|---|
| NSN | 5310-01-657-0102 |
| Primary Part Number | 2801-5378 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Spectra Precision |
| Status | ACTIVE |
| 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 |
|---|---|
| 2801-5378 PRIMARY | Spectra Precision (USA) |
| Reference | Meaning |
|---|---|
| 0720-2750 | D/9 Drawing number reference only Spectra Precision |
| 7160DX515DX062THK | 5/2 Secondary reference U.S. Government activity |
NSN 5310-01-657-0102 is a Washer,flat, manufactured by Spectra Precision, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-657-0102 has 1 manufacturer part number on file: 2801-5378 (Spectra Precision).
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.