The O-Ring, cataloged under National Stock Number 5331-01-329-1878, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Unison Industries Llc. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | Unison Industries Llc (CAGE 59501) |
| Parameter | Value |
|---|---|
| NSN | 5331-01-329-1878 |
| Primary Part Number | 151898 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Unison Industries Llc |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Part Number | Manufacturer |
|---|---|
| 151898 PRIMARY | Unison Industries Llc (USA) |
| Reference | Meaning |
|---|---|
| 151898 | 5/2 Secondary reference U.S. Government activity |
NSN 5331-01-329-1878 is a O-Ring, manufactured by Unison Industries Llc, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-329-1878 has 1 manufacturer part number on file: 151898 (Unison Industries Llc).
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.