The O-Ring, cataloged under National Stock Number 5331-01-385-3579, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Preco Equipment Co Dba Preco Marine. Government technical data includes 2 specifications, cited from the U.S. Government catalog. The record lists 3 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5331-01-385-3579 |
| Primary Part Number | 2311051P |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Preco Equipment Co Dba Preco Marine |
| Status | ACTIVE |
| Center Hole Diameter | 4.250 INCHES NOMINAL IN |
| Material | RUBBER |
| 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 |
|---|---|
| 2311051 | Fairbanks Morse, Llc (USA) |
| 2311051 | Diesels and Components Pty Ltd (AUS) |
| 2311051P PRIMARY | Preco Equipment Co Dba Preco Marine (USA) |
| Reference | Meaning |
|---|---|
| 2311051 | 5/9 Secondary reference Coltec Industries Inc Dba Fairbanks Morse Engine Fm/alco |
NSN 5331-01-385-3579 is a O-Ring, manufactured by Preco Equipment Co Dba Preco Marine, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-385-3579 has 3 manufacturer part numbers on file: 2311051 (Fairbanks Morse, Llc), 2311051 (Diesels and Components Pty Ltd), 2311051P (Preco Equipment Co Dba Preco Marine).
Key specifications for 2311051P: Special Features: 4.625 IN. OD IN; Center Hole Diameter: 4.250 INCHES NOMINAL IN; End Item Identification: ENGINE, DIESEL P/N 16-251-B PORT ONBOARD 210 FT WMEC MMA COAST GUARD VESSELS FT; Material: RUBBER. 2 specifications are documented in the U.S. Government catalog.
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.