The Washer,flat, cataloged under National Stock Number 5310-01-617-4643, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Rix Industries. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Item Name | Washer,flat |
| FSC / FSG | 5310 — Nuts and Washers (FSG 53) |
| Manufacturers | Rix Industries (CAGE 28953) |
| Parameter | Value |
|---|---|
| NSN | 5310-01-617-4643 |
| Primary Part Number | 20-4542 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Rix Industries |
| 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 |
|---|---|
| 20-4542 PRIMARY | Rix Industries (USA) |
| Reference | Meaning |
|---|---|
| D3494 ITEM 27 | D/9 Drawing number reference only Rix Industries |
NSN 5310-01-617-4643 is a Washer,flat, manufactured by Rix Industries, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-617-4643 has 1 manufacturer part number on file: 20-4542 (Rix Industries).
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.