The O-Ring, cataloged under National Stock Number 5331-01-439-8821, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Bae Systems Land & Armaments L.p.. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | Amz Alabama Inc. (CAGE 076M6); Bae Systems Land & Armaments L.p. (CAGE 54786) |
| Parameter | Value |
|---|---|
| NSN | 5331-01-439-8821 |
| Primary Part Number | 4397059-016 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Bae Systems Land & Armaments L.p. |
| 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 |
|---|---|
| 4397059-016 | Amz Alabama Inc. (USA) |
| 4397059-016 PRIMARY | Bae Systems Land & Armaments L.p. (USA) |
| Reference | Meaning |
|---|---|
| 4397059-016 | 3/9 Design control — primary reference Bae Systems Survivability Systems Llc |
NSN 5331-01-439-8821 is a O-Ring, manufactured by Bae Systems Land & Armaments L.p., classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-439-8821 has 2 manufacturer part numbers on file: 4397059-016 (Amz Alabama Inc.), 4397059-016 (Bae Systems Land & Armaments L.p.).
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.