The Washer,flat, cataloged under National Stock Number 5310-01-671-4983, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Metric and Multistandard Components Corp. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | Metric and Multistandard Components Corp (CAGE 15526); Century Fasteners Corp. Dba Century Fasteners Corp (CAGE 06641) |
| Parameter | Value |
|---|---|
| NSN | 5310-01-671-4983 |
| Primary Part Number | 5517572-001ST |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Metric and Multistandard Components Corp |
| 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 |
|---|---|
| 5517572-001ST PRIMARY | Metric and Multistandard Components Corp (USA) |
| 5517572-001ST | Century Fasteners Corp. Dba Century Fasteners Corp (USA) |
| Reference | Meaning |
|---|---|
| 5517572 | D/9 Drawing number reference only Naval Sea Systems Command |
| 5517572-001ST | 7/2 Vendor item drawing reference Naval Sea Systems Command |
| 5517572-001ST | C/1 Advisory reference — outside the item-of-supply concept Sps Technologies Inc Unbrako Div |
NSN 5310-01-671-4983 is a Washer,flat, manufactured by Metric and Multistandard Components Corp, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-671-4983 has 2 manufacturer part numbers on file: 5517572-001ST (Metric and Multistandard Components Corp), 5517572-001ST (Century Fasteners Corp. Dba Century Fasteners Corp).
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.