The O-Ring, cataloged under National Stock Number 5331-01-665-1079, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Freudenberg-Nok General Partnership Dba International Seal Co Inc. 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. 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 | 5331-01-665-1079 |
| Primary Part Number | NAS1611-209 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Freudenberg-Nok General Partnership Dba International Seal Co Inc |
| Status | ACTIVE |
| Outside Diameter | 0.9375 INCHES NOMINAL IN |
| Color | BLACK |
| Center Hole Diameter | 0.6875 INCHES NOMINAL IN |
| 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 |
|---|---|
| NAS1611-209 PRIMARY | Freudenberg-Nok General Partnership Dba International Seal Co Inc (USA) |
NSN 5331-01-665-1079 is a O-Ring, manufactured by Freudenberg-Nok General Partnership Dba International Seal Co Inc, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-665-1079 has 1 manufacturer part number on file: NAS1611-209 (Freudenberg-Nok General Partnership Dba International Seal Co Inc).
1 possible match (shared part number, not a government interchangeability claim): 5331-01-678-0321. Verify interchangeability with system specifications before substitution.
Key specifications for NAS1611-209: Outside Diameter: 0.9375 INCHES NOMINAL IN; Color: BLACK; Center Hole Diameter: 0.6875 INCHES NOMINAL IN; Part Name Assigned by Controlling Agency: O-RING. 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.