The Washer,flat, cataloged under National Stock Number 5310-01-660-1594, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Huntington Ingalls Incorporated Div Ingalls Shipbuilding. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | Huntington Ingalls Incorporated Div Ingalls Shipbuilding (CAGE 34293) |
| Parameter | Value |
|---|---|
| NSN | 5310-01-660-1594 |
| Primary Part Number | SP001099-200-20 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Huntington Ingalls Incorporated Div Ingalls Shipbuilding |
| 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 |
|---|---|
| SP001099-200-20 | Huntington Ingalls Incorporated Div Ingalls Shipbuilding (USA) |
| Reference | Meaning |
|---|---|
| SP001099 FIND NO 200-20 | C/1 Advisory reference — outside the item-of-supply concept Huntington Ingalls Incorporated Div Ingalls Shipbuilding |
| JE1782-200-20 | 3/2 Design control — primary reference U.S. Government activity |
| SP001099 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 5310-01-660-1594 is a Washer,flat, manufactured by Huntington Ingalls Incorporated Div Ingalls Shipbuilding, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-660-1594 has 1 manufacturer part number on file: SP001099-200-20 (Huntington Ingalls Incorporated Div Ingalls Shipbuilding).
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.