The O-Ring, cataloged under National Stock Number 5331-01-415-0820, 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 5 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through both NSN and commercial part number lookups. 8 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5331-01-415-0820 |
| Primary Part Number | ST1946-204 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Rtx Corporation Div Pratt & Whitney |
| Status | ACTIVE |
| Cross-Sectional Height | 0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN |
| Hardness Rating | 70.0 SHORE DUROMETER A MINIMUM AND 80.0 SHORE DUROMETER A MAXIMUM |
| Material Document and Classification | MIL-R-83485 TYPE 1 MIL SPEC SINGLE MATERIAL RESPONSE |
| Center Hole Diameter | 0.354 INCHES MINIMUM AND 0.364 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 |
|---|---|
| ST1946-204 PRIMARY | Rtx Corporation Div Pratt & Whitney (USA) |
| ST1946-204 PRIMARY | Parker-Hannifin Corp Div O-Ring Division (USA) |
| ST1946-204 | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA) |
| ST1946-204 PRIMARY | Acushnet Rubber Company, Inc. Dba Precix (USA) |
| ST1946-204 PRIMARY | Freudenberg-Nok General Partnership Dba International Seal Co Inc (USA) |
| Reference | Meaning |
|---|---|
| 2-204V835-75 | 5/9 Secondary reference Parker-Hannifin Corp Div O-Ring Division |
| AMC-R-83485 | 5/9 Secondary reference U.S. Government activity |
| M83485/1-204 | 5/9 Secondary reference U.S. Government activity |
| V0835 2-204 | 5/9 Secondary reference Parker-Hannifin Corp Div O-Ring Division |
| AS204-V14-75 | 5/9 Secondary reference Hutchinson Seal Corporation |
| MIL-R-83485 | 5/9 Secondary reference U.S. Government activity |
| 26-0402-67 | 5/1 Secondary reference Renk America Llc Div Renk America |
| AMC-R-83485 | 5/1 Secondary reference Sae International Dba Sae International |
NSN 5331-01-415-0820 is a O-Ring, manufactured by Rtx Corporation Div Pratt & Whitney, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-415-0820 has 5 manufacturer part numbers on file: ST1946-204 (Rtx Corporation Div Pratt & Whitney), ST1946-204 (Parker-Hannifin Corp Div O-Ring Division), ST1946-204 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney), ST1946-204 (Acushnet Rubber Company, Inc. Dba Precix), ST1946-204 (Freudenberg-Nok General Partnership Dba International Seal Co Inc).
Key specifications for ST1946-204: Cross-Sectional Height: 0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN; Hardness Rating: 70.0 SHORE DUROMETER A MINIMUM AND 80.0 SHORE DUROMETER A MAXIMUM; Material Document and Classification: MIL-R-83485 TYPE 1 MIL SPEC SINGLE MATERIAL RESPONSE; Center Hole Diameter: 0.354 INCHES MINIMUM AND 0.364 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.