The O-Ring, cataloged under National Stock Number 5331-01-688-4591, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Quantum Marine Engineering, Inc.. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5331-01-688-4591 |
| Primary Part Number | QMRIN31020 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Quantum Marine Engineering, Inc. |
| 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 |
|---|---|
| QMRIN31020 PRIMARY | Quantum Marine Engineering, Inc. (USA) |
NSN 5331-01-688-4591 is a O-Ring, manufactured by Quantum Marine Engineering, Inc., classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-688-4591 has 1 manufacturer part number on file: QMRIN31020 (Quantum Marine Engineering, Inc.).
Key specifications for QMRIN31020: Special Features: ORING BUNA-N ROUND - HYDRAULIC SAE 20 PORT TUBE FITTINGS; Part Name Assigned by Controlling Agency: O-RING. 0 specifications are documented in the U.S. Government catalog.
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.