The Washer,flat, cataloged under National Stock Number 5310-01-170-6256, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Simmonds Precision Products Inc. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Item Name | Washer,flat |
| FSC / FSG | 5310 — Nuts and Washers (FSG 53) |
| Manufacturers | Simmonds Precision Products Inc (CAGE 12511) |
| Parameter | Value |
|---|---|
| NSN | 5310-01-170-6256 |
| Primary Part Number | S6028 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Simmonds Precision Products Inc |
| 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 |
|---|---|
| S6028 PRIMARY | Simmonds Precision Products Inc (USA) |
NSN 5310-01-170-6256 is a Washer,flat, manufactured by Simmonds Precision Products Inc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-170-6256 has 1 manufacturer part number on file: S6028 (Simmonds Precision Products Inc).
2 possible matches (shared part number, not a government interchangeability claim): 5331-01-189-3632, 5950-01-416-4242. Verify interchangeability with system specifications before substitution.
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.