The O-Ring, cataloged under National Stock Number 5331-01-581-0657, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Isuzu Diesel of North America. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Item Name | O-Ring |
| FSC / FSG | 5331 — O-ring (FSG 53) |
| Manufacturers | Isuzu Diesel of North America (CAGE 4N530); Mack Boring & Parts Co (CAGE 29186) |
| Parameter | Value |
|---|---|
| NSN | 5331-01-581-0657 |
| Primary Part Number | 894157-8850 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Isuzu Diesel of North America |
| 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 |
|---|---|
| 894157-8850 PRIMARY | Isuzu Diesel of North America (USA) |
| 894157-8850 | Mack Boring & Parts Co (USA) |
| Reference | Meaning |
|---|---|
| 1004932 | D/9 Drawing number reference only Dhs Systems Llc |
NSN 5331-01-581-0657 is a O-Ring, manufactured by Isuzu Diesel of North America, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-581-0657 has 2 manufacturer part numbers on file: 894157-8850 (Isuzu Diesel of North America), 894157-8850 (Mack Boring & Parts Co).
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.