The Washer,flat, cataloged under National Stock Number 5310-01-371-4628, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Defense Maritime Solutions, Inc.. The record lists 3 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | Defense Maritime Solutions, Inc. (CAGE 0EYA6); John Crane, Inc (CAGE 71724) |
| Parameter | Value |
|---|---|
| NSN | 5310-01-371-4628 |
| Primary Part Number | H4240917 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Defense Maritime Solutions, Inc. |
| 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 |
|---|---|
| H71518/8/3 | Defense Maritime Solutions, Inc. (USA) |
| H4240917 PRIMARY | Defense Maritime Solutions, Inc. (USA) |
| H42409-17 | John Crane, Inc (USA) |
| Reference | Meaning |
|---|---|
| H-42409-17 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
| H72046-8-3 | 5/9 Secondary reference John Crane, Inc |
| H4240917 | 5/9 Secondary reference Wartsila Lips Inc |
NSN 5310-01-371-4628 is a Washer,flat, manufactured by Defense Maritime Solutions, Inc., classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-371-4628 has 3 manufacturer part numbers on file: H71518/8/3 (Defense Maritime Solutions, Inc.), H4240917 (Defense Maritime Solutions, Inc.), H42409-17 (John Crane, Inc).
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.