The O-Ring, cataloged under National Stock Number 5331-01-485-6400, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Acushnet Rubber Company, Inc. Dba Precix. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5331-01-485-6400 |
| Primary Part Number | ST1946-161 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Acushnet Rubber Company, Inc. Dba Precix |
| Status | ACTIVE |
| Cross-Sectional Height | 0.100 INCHES MINIMUM AND 0.106 INCHES MAXIMUM IN |
| Hardness Rating | 70.0 SHORE DUROMETER A MINIMUM AND 80.0 SHORE DUROMETER A MAXIMUM |
| Material Document and Classification | MIL-R-83451/1 MIL SPEC SINGLE MATERIAL RESPONSE |
| Center Hole Diameter | 5.452 INCHES MINIMUM AND 5.522 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 |
|---|---|
| ST1946-161 PRIMARY | Acushnet Rubber Company, Inc. Dba Precix (USA) |
| ST1946-161 PRIMARY | Freudenberg-Nok General Partnership Dba International Seal Co Inc (USA) |
| ST1946-161 PRIMARY | Parker-Hannifin Corp Div O-Ring Division (USA) |
| ST1946-161 | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA) |
| Reference | Meaning |
|---|---|
| ST1946-161 | 5/9 Secondary reference Rtx Corporation Div Pratt & Whitney |
NSN 5331-01-485-6400 is a O-Ring, manufactured by Acushnet Rubber Company, Inc. Dba Precix, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-485-6400 has 4 manufacturer part numbers on file: ST1946-161 (Acushnet Rubber Company, Inc. Dba Precix), ST1946-161 (Freudenberg-Nok General Partnership Dba International Seal Co Inc), ST1946-161 (Parker-Hannifin Corp Div O-Ring Division), ST1946-161 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney).
Key specifications for ST1946-161: Cross-Sectional Height: 0.100 INCHES MINIMUM AND 0.106 INCHES MAXIMUM IN; Hardness Rating: 70.0 SHORE DUROMETER A MINIMUM AND 80.0 SHORE DUROMETER A MAXIMUM; Material Document and Classification: MIL-R-83451/1 MIL SPEC SINGLE MATERIAL RESPONSE; Center Hole Diameter: 5.452 INCHES MINIMUM AND 5.522 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.
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.