The O-Ring, cataloged under National Stock Number 5331-01-211-7498, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Rtx Corporation Div Pratt & Whitney. Government technical data includes 6 specifications, cited from the U.S. Government catalog. The record lists 6 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 9 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5331-01-211-7498 |
| Primary Part Number | ST1946-015 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Rtx Corporation Div Pratt & Whitney |
| Status | ACTIVE |
| Temp Rating | -40.0 FAHRENHEIT AND 400.0 FAHRENHEIT DEGF |
| Cross-Sectional Height | 0.067 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN |
| Outside Diameter | 0.678 INCHES MINIMUM AND 0.704 INCHES MAXIMUM IN |
| Hardness Rating | 75.0 SHORE DUROMETER A NOMINAL |
| Center Hole Diameter | 0.544 INCHES MINIMUM AND 0.558 INCHES MAXIMUM IN |
| Material | RUBBER FLUOROCARBON CLASS FPM |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | F |
| Part Number | Manufacturer |
|---|---|
| ST1946-015 PRIMARY | Rtx Corporation Div Pratt & Whitney (USA) |
| ST1946-015 PRIMARY | Freudenberg-Nok General Partnership Dba International Seal Co Inc (USA) |
| ST1946-015 PRIMARY | Greene Tweed & Co Inc (USA) |
| ST1946-015 | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA) |
| ST1946-015 PRIMARY | Parker-Hannifin Corp Div O-Ring Division (USA) |
| ST1946-015 PRIMARY | Acushnet Rubber Company, Inc. Dba Precix (USA) |
| Reference | Meaning |
|---|---|
| 10444076 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| V0835 2-015 | 5/9 Secondary reference Parker-Hannifin Corp Div O-Ring Division |
| AMC-R-83485 | 5/9 Secondary reference U.S. Government activity |
| 2-015 V0835-75 | 5/9 Secondary reference Parker-Hannifin Corp Div O-Ring Division |
| M83485/1-015 | 5/9 Secondary reference U.S. Government activity |
| M83485/1-015 | 5/9 Secondary reference U.S. Government activity |
| 5331PL0658494 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| MIL-R-83485 | 5/9 Secondary reference U.S. Government activity |
| 5331PL2028303 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
NSN 5331-01-211-7498 is a O-Ring, manufactured by Rtx Corporation Div Pratt & Whitney, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-211-7498 has 6 manufacturer part numbers on file: ST1946-015 (Rtx Corporation Div Pratt & Whitney), ST1946-015 (Freudenberg-Nok General Partnership Dba International Seal Co Inc), ST1946-015 (Greene Tweed & Co Inc), ST1946-015 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney), ST1946-015 (Parker-Hannifin Corp Div O-Ring Division) and 1 more.
2 possible matches (shared part number, not a government interchangeability claim): 5331-01-646-7924, 5331-01-670-1686. Verify interchangeability with system specifications before substitution.
Key specifications for ST1946-015: Temp Rating: -40.0 FAHRENHEIT AND 400.0 FAHRENHEIT DEGF; Cross-Sectional Height: 0.067 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN; Outside Diameter: 0.678 INCHES MINIMUM AND 0.704 INCHES MAXIMUM IN; Hardness Rating: 75.0 SHORE DUROMETER A NOMINAL. 6 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.