The Washer,flat, cataloged under National Stock Number 5310-01-485-9289, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Fincantieri Marine Systems North America, Inc. Dba Fincantieri Marine Systems North Am. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government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 | Fincantieri Marine Systems North America, Inc. Dba Fincantieri Marine Systems North Am (CAGE 0VP52) |
| Parameter | Value |
|---|---|
| NSN | 5310-01-485-9289 |
| Primary Part Number | MCM133 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Fincantieri Marine Systems North America, Inc. Dba Fincantieri Marine Systems North Am |
| 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 |
|---|---|
| MCM133 PRIMARY | Fincantieri Marine Systems North America, Inc. Dba Fincantieri Marine Systems North Am (USA) |
| MCM127 PC 8 | Fincantieri Marine Systems North America, Inc. Dba Fincantieri Marine Systems North Am (USA) |
| Reference | Meaning |
|---|---|
| MCM127 | D/9 Drawing number reference only Fincantieri Marine Systems North America, Inc. Dba Fincantieri Marine Systems North Am |
NSN 5310-01-485-9289 is a Washer,flat, manufactured by Fincantieri Marine Systems North America, Inc. Dba Fincantieri Marine Systems North Am, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-485-9289 has 2 manufacturer part numbers on file: MCM133 (Fincantieri Marine Systems North America, Inc. Dba Fincantieri Marine Systems North Am), MCM127 PC 8 (Fincantieri Marine Systems North America, Inc. Dba Fincantieri Marine Systems North Am).
3 possible matches (shared part number, not a government interchangeability claim): 5310-01-485-9946, 2510-01-486-3678, 2990-01-486-5087. 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.