The O-Ring, cataloged under National Stock Number 5331-00-771-7679, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Parco, Llc. Government technical data includes 5 specifications, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 6 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Cancelled.
| Parameter | Value |
|---|---|
| NSN | 5331-00-771-7679 |
| Primary Part Number | PRP568-908-3110-70 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Parco, Llc |
| Status | CANCELLED |
| Cross-Sectional Height | 0.028 INCHES MINIMUM AND 0.034 INCHES MAXIMUM IN |
| Outside Diameter | 0.383 INCHES MINIMUM AND 0.405 INCHES MAXIMUM IN |
| Hardness Rating | 70.0 SHORE DUROMETER A NOMINAL |
| Center Hole Diameter | 0.313 INCHES MINIMUM AND 0.338 INCHES MAXIMUM IN |
| Material | RUBBER CHLOROPRENE CLASS CR |
| Acquisition Status | CANCELLED |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| PRP568-908-3110-70 | Parco, Llc (USA) |
| FEN-NG-205 | Fenn Night Vision Limited (GBR) |
| PRP908-2347 | Parker Hannifin Corporation Div O-Ring Division (USA) |
| 908-2347 | Parker Hannifin Corporation Div O-Ring Division (USA) |
| Reference | Meaning |
|---|---|
| MS28900-8 | 2/2 Government specification standardization U.S. Government activity |
| 5331PL0166814 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| C0873 5-133 | 5/1 Secondary reference Parker-Hannifin Corp Div O-Ring Division |
| MS28900 | 4/1 Identification reference U.S. Government activity |
| 5-133 C873-70 | 5/9 Secondary reference Parker-Hannifin Corp Div O-Ring Division |
| B-8SR533-70 | 5/2 Secondary reference U.S. Government activity |
NSN 5331-00-771-7679 is a O-Ring, manufactured by Parco, Llc, classified under FSC 5331, O-ring. Status: cancelled.
NSN 5331-00-771-7679 has 4 manufacturer part numbers on file: PRP568-908-3110-70 (Parco, Llc), FEN-NG-205 (Fenn Night Vision Limited), PRP908-2347 (Parker Hannifin Corporation Div O-Ring Division), 908-2347 (Parker Hannifin Corporation Div O-Ring Division).
6 possible matches (shared part number, not a government interchangeability claim): 5331-00-814-8618, 5331-00-814-8636, 5331-00-822-0081. Verify interchangeability with system specifications before substitution.
Key specifications for PRP568-908-3110-70: Cross-Sectional Height: 0.028 INCHES MINIMUM AND 0.034 INCHES MAXIMUM IN; Outside Diameter: 0.383 INCHES MINIMUM AND 0.405 INCHES MAXIMUM IN; Hardness Rating: 70.0 SHORE DUROMETER A NOMINAL; Center Hole Diameter: 0.313 INCHES MINIMUM AND 0.338 INCHES MAXIMUM IN. 5 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.
NSN 5331-00-771-7679 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.
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.