The O-Ring, cataloged under National Stock Number 5331-01-191-2522, 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 6 specifications, cited from the U.S. Government catalog. The record lists 5 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 10 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5331-01-191-2522 |
| Primary Part Number | ST1946-024 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Freudenberg-Nok General Partnership Dba International Seal Co Inc |
| 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 | 1.238 INCHES MINIMUM AND 1.270 INCHES MAXIMUM IN |
| Hardness Rating | 75.0 SHORE DUROMETER A NOMINAL |
| Center Hole Diameter | 1.104 INCHES MINIMUM AND 1.124 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 | X |
| Part Number | Manufacturer |
|---|---|
| ST1946-024 | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA) |
| ST1946-024 PRIMARY | Freudenberg-Nok General Partnership Dba International Seal Co Inc (USA) |
| ST1946-024 PRIMARY | Acushnet Rubber Company, Inc. Dba Precix (USA) |
| ST1946-024 PRIMARY | Parker-Hannifin Corp Div O-Ring Division (USA) |
| ST1946-024 PRIMARY | Rtx Corporation Div Pratt & Whitney (USA) |
| Reference | Meaning |
|---|---|
| 5331PL0828250 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| MIL-R-83485/1 | 5/9 Secondary reference U.S. Government activity |
| 5331PL1733036 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| V0835 2-024 | 5/9 Secondary reference Parker-Hannifin Corp Div O-Ring Division |
| M83485/1-024 | 5/9 Secondary reference U.S. Government activity |
| AMS-R-83485/1 | 5/9 Secondary reference U.S. Government activity |
| AV23A1116BD ITEM 12 | 5/9 Secondary reference Itt Aerospace Controls Llc Dba Itt Aerospace Controls Unit S |
| 5331PL1837235 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| M83485/1-024 | 5/9 Secondary reference U.S. Government activity |
| 2-024 V0835-75 | 5/9 Secondary reference Parker-Hannifin Corp Div O-Ring Division |
NSN 5331-01-191-2522 is a O-Ring, manufactured by Freudenberg-Nok General Partnership Dba International Seal Co Inc, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-191-2522 has 5 manufacturer part numbers on file: ST1946-024 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney), ST1946-024 (Freudenberg-Nok General Partnership Dba International Seal Co Inc), ST1946-024 (Acushnet Rubber Company, Inc. Dba Precix), ST1946-024 (Parker-Hannifin Corp Div O-Ring Division), ST1946-024 (Rtx Corporation Div Pratt & Whitney).
1 possible match (shared part number, not a government interchangeability claim): 5331-01-646-7904. Verify interchangeability with system specifications before substitution.
Key specifications for ST1946-024: 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: 1.238 INCHES MINIMUM AND 1.270 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.