The O-Ring, cataloged under National Stock Number 5331-00-291-1990, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Parker-Hannifin Corp Div O-Ring Division. Government technical data includes 3 specifications, cited from the U.S. Government catalog. The record lists 7 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5331-00-291-1990 |
| Primary Part Number | 7708800 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Parker-Hannifin Corp Div O-Ring Division |
| Status | ACTIVE |
| Cross-Sectional Height | 0.205 INCHES MINIMUM AND 0.215 INCHES MAXIMUM IN |
| Center Hole Diameter | 19.300 INCHES MINIMUM AND 19.400 INCHES MAXIMUM IN |
| Material | RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR |
| 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 |
|---|---|
| 7708800 PRIMARY | Parker-Hannifin Corp Div O-Ring Division (USA) |
| 7708800 PRIMARY | Lydall Inc Elastomer Products Group (USA) |
| 7708800 PRIMARY | Parker Hannifin Corporation Div O-Ring Division (USA) |
| 7708800 PRIMARY | Parco, Llc (USA) |
| 7708800 PRIMARY | Acushnet Rubber Company, Inc. Dba Precix (USA) |
| 7708800 | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
| 7708800 PRIMARY | Atlantic India Rubber Co Inc (USA) |
| Reference | Meaning |
|---|---|
| 7708800 | 3/2 Design control — primary reference U.S. Government activity |
| 7708800 | 5/9 Secondary reference Hutchinson Seal Corporation |
NSN 5331-00-291-1990 is a O-Ring, manufactured by Parker-Hannifin Corp Div O-Ring Division, classified under FSC 5331, O-ring. Status: active.
NSN 5331-00-291-1990 has 7 manufacturer part numbers on file: 7708800 (Parker-Hannifin Corp Div O-Ring Division), 7708800 (Lydall Inc Elastomer Products Group), 7708800 (Parker Hannifin Corporation Div O-Ring Division), 7708800 (Parco, Llc), 7708800 (Acushnet Rubber Company, Inc. Dba Precix) and 2 more.
Key specifications for 7708800: Cross-Sectional Height: 0.205 INCHES MINIMUM AND 0.215 INCHES MAXIMUM IN; Center Hole Diameter: 19.300 INCHES MINIMUM AND 19.400 INCHES MAXIMUM IN; Material: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR. 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.