The O-Ring, cataloged under National Stock Number 5331-01-581-0660, 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | Mack Boring & Parts Co (CAGE 29186); Isuzu Diesel of North America (CAGE 4N530) |
| Parameter | Value |
|---|---|
| NSN | 5331-01-581-0660 |
| Primary Part Number | 894157-8840 |
| 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 |
|---|---|
| 894157-8840 | Mack Boring & Parts Co (USA) |
| 894157-8840 PRIMARY | Isuzu Diesel of North America (USA) |
| Reference | Meaning |
|---|---|
| 1004933 | D/9 Drawing number reference only Dhs Systems Llc |
NSN 5331-01-581-0660 is a O-Ring, manufactured by Isuzu Diesel of North America, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-581-0660 has 2 manufacturer part numbers on file: 894157-8840 (Mack Boring & Parts Co), 894157-8840 (Isuzu Diesel of North America).
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.