The Washer,flat, cataloged under National Stock Number 5310-01-503-6863, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Carver Pump Company. The record lists 4 manufacturer part numbers 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | Carver Pump Company (CAGE 10941) |
| Parameter | Value |
|---|---|
| NSN | 5310-01-503-6863 |
| Primary Part Number | 999-1110-B-01 ITEM 28 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Carver Pump Company |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Part Number | Manufacturer |
|---|---|
| 999-1110-B-01 ITEM 28 | Carver Pump Company (USA) |
| 999-1110-B-02-28 | Carver Pump Company (USA) |
| 999-1110-B-02 REV 4 ITEM 28 | Carver Pump Company (USA) |
| 999-1110-B-01-28 | Carver Pump Company (USA) |
| Reference | Meaning |
|---|---|
| 028-1712001-201 | C/1 Advisory reference — outside the item-of-supply concept Carver Pump Company |
| 028-1712001C201 | 3/9 Design control — primary reference Carver Pump Company |
NSN 5310-01-503-6863 is a Washer,flat, manufactured by Carver Pump Company, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-503-6863 has 4 manufacturer part numbers on file: 999-1110-B-01 ITEM 28 (Carver Pump Company), 999-1110-B-02-28 (Carver Pump Company), 999-1110-B-02 REV 4 ITEM 28 (Carver Pump Company), 999-1110-B-01-28 (Carver Pump Company).
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.