The O-Ring, cataloged under National Stock Number 5331-01-163-4979, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Amz Alabama Inc.. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Item Name | O-Ring |
| FSC / FSG | 5331 — O-ring (FSG 53) |
| Manufacturers | Bae Systems Hagglunds Aktiebolag (CAGE AC90N); Amz Alabama Inc. (CAGE 076M6); Hagglunds Vehicle Gmbh (CAGE C8716) |
| Parameter | Value |
|---|---|
| NSN | 5331-01-163-4979 |
| Primary Part Number | 90794-991 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Amz Alabama Inc. |
| 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 |
|---|---|
| 21522151-194 | Bae Systems Hagglunds Aktiebolag (SWE) |
| 90794-991 PRIMARY | Amz Alabama Inc. (USA) |
| 04250985739617 | Hagglunds Vehicle Gmbh (DEU) |
| Reference | Meaning |
|---|---|
| 2152 2151-194 | 5/9 Secondary reference Stefa Industri Ab |
| 474-6379 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| 21522151-194 | 5/9 Secondary reference Bae Systems Hagglunds Ab |
| 90794-991 | 3/9 Design control — primary reference U.s. Defense Services, Inc. Dba Usds |
| 21522151-194 | 5/9 Secondary reference U.s. Defense Services, Inc. Dba Usds |
NSN 5331-01-163-4979 is a O-Ring, manufactured by Amz Alabama Inc., classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-163-4979 has 3 manufacturer part numbers on file: 21522151-194 (Bae Systems Hagglunds Aktiebolag), 90794-991 (Amz Alabama Inc.), 04250985739617 (Hagglunds Vehicle Gmbh).
1 possible match (shared part number, not a government interchangeability claim): 5330-01-431-8769. 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.