The O-Ring, cataloged under National Stock Number 5331-01-178-1255, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Parker-Hannifin Corporation Dba Pneutronics Div Pneumatic Division. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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.
| Item Name | O-Ring |
| FSC / FSG | 5331 — O-ring (FSG 53) |
| Manufacturers | Parker-Hannifin Corporation Dba Pneutronics Div Pneumatic Division (CAGE 18925) |
| Parameter | Value |
|---|---|
| NSN | 5331-01-178-1255 |
| Primary Part Number | 03454-0026 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Parker-Hannifin Corporation Dba Pneutronics Div Pneumatic Division |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Part Number | Manufacturer |
|---|---|
| 03454-0026 PRIMARY | Parker-Hannifin Corporation Dba Pneutronics Div Pneumatic Division (USA) |
| Reference | Meaning |
|---|---|
| 3454-26 | 5/9 Secondary reference U.S. Government activity |
| 03454-0026 | 3/9 Design control — primary reference U.S. Government activity |
NSN 5331-01-178-1255 is a O-Ring, manufactured by Parker-Hannifin Corporation Dba Pneutronics Div Pneumatic Division, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-178-1255 has 1 manufacturer part number on file: 03454-0026 (Parker-Hannifin Corporation Dba Pneutronics Div Pneumatic Division).
1 possible match (shared part number, not a government interchangeability claim): 5998-01-386-7297. Verify interchangeability with system specifications before substitution.
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.