The O-Ring, cataloged under National Stock Number 5331-00-445-0731, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Copeland Corporation Ltd. Government technical data includes 3 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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.
| Parameter | Value |
|---|---|
| NSN | 5331-00-445-0731 |
| Primary Part Number | 020-0003-02 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Copeland Corporation Ltd |
| Status | ACTIVE |
| Cross-Sectional Height | 0.100 INCHES MINIMUM AND 0.106 INCHES MAXIMUM IN |
| Center Hole Diameter | 1.481 INCHES MINIMUM AND 1.493 INCHES MAXIMUM IN |
| Material | RUBBER SYNTHETIC |
| 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 |
|---|---|
| 020-0003-02 | Copeland Corporation Ltd (GBR) |
| Reference | Meaning |
|---|---|
| 020-0003-02-2 | 3/9 Design control — primary reference Copeland Corp |
| 9R0-054 | 5/9 Secondary reference Copeland Corp |
| 020-0003-02 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
| 020&0003&02 | C/1 Advisory reference — outside the item-of-supply concept Copeland Corp |
| 9R0-054 | 5/9 Secondary reference U.S. Government activity |
NSN 5331-00-445-0731 is a O-Ring, manufactured by Copeland Corporation Ltd, classified under FSC 5331, O-ring. Status: active.
NSN 5331-00-445-0731 has 1 manufacturer part number on file: 020-0003-02 (Copeland Corporation Ltd).
1 possible match (shared part number, not a government interchangeability claim): 5331-01-268-2211. Verify interchangeability with system specifications before substitution.
Key specifications for 020-0003-02: Cross-Sectional Height: 0.100 INCHES MINIMUM AND 0.106 INCHES MAXIMUM IN; Center Hole Diameter: 1.481 INCHES MINIMUM AND 1.493 INCHES MAXIMUM IN; Material: RUBBER SYNTHETIC. 3 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.