The Washer,flat, cataloged under National Stock Number 5310-01-218-9499, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Morse Diving, Inc.. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | Morse Diving, Inc. (CAGE 41620) |
| Parameter | Value |
|---|---|
| NSN | 5310-01-218-9499 |
| Primary Part Number | 8800-20-5 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Morse Diving, Inc. |
| 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 |
|---|---|
| 8800-20-5 PRIMARY | Morse Diving, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 4666947 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| 1069-11 | 5/2 Secondary reference U.S. Government activity |
NSN 5310-01-218-9499 is a Washer,flat, manufactured by Morse Diving, Inc., classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-218-9499 has 1 manufacturer part number on file: 8800-20-5 (Morse Diving, Inc.).
1 possible match (shared part number, not a government interchangeability claim): 6645-01-523-7171. 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.