The O-Ring, cataloged under National Stock Number 5331-01-091-3337, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Weldon Pump 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | Weldon Pump Llc (CAGE 9Z270) |
| Parameter | Value |
|---|---|
| NSN | 5331-01-091-3337 |
| Primary Part Number | P408 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Weldon Pump 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 |
|---|---|
| P408 PRIMARY | Weldon Pump Llc (USA) |
| Reference | Meaning |
|---|---|
| P408 | 5/9 Secondary reference Weldon Tool Co the |
NSN 5331-01-091-3337 is a O-Ring, manufactured by Weldon Pump Llc, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-091-3337 has 1 manufacturer part number on file: P408 (Weldon Pump Llc).
1 possible match (shared part number, not a government interchangeability claim): 3120-01-307-2143. 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.