The O-Ring, cataloged under National Stock Number 5331-01-173-3418, 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 Gear Pump Division. The record lists 3 manufacturer part numbers 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Item Name | O-Ring |
| FSC / FSG | 5331 — O-ring (FSG 53) |
| Manufacturers | Parker-Hannifin Corporation Dba Pneutronics Div Gear Pump Division (CAGE 10129); Brake Supply Company, Inc. Dba Perfection Hydraulics (CAGE 3DXM9); Lifco Hydraulics Inc (CAGE 0VEY1) |
| Parameter | Value |
|---|---|
| NSN | 5331-01-173-3418 |
| Primary Part Number | 55-156-8309 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Parker-Hannifin Corporation Dba Pneutronics Div Gear Pump 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 |
|---|---|
| 55-156-8309 PRIMARY | Parker-Hannifin Corporation Dba Pneutronics Div Gear Pump Division (USA) |
| 55-156-8309 | Brake Supply Company, Inc. Dba Perfection Hydraulics (USA) |
| 0081955 | Lifco Hydraulics Inc (USA) |
| Reference | Meaning |
|---|---|
| 55-156-8309 | 3/9 Design control — primary reference Dana Corp Tyrone Hydraulics Inc Div |
| 45506-15 ITEM36 | 5/9 Secondary reference Dana Corp Tyrone Hydraulics Inc Div |
NSN 5331-01-173-3418 is a O-Ring, manufactured by Parker-Hannifin Corporation Dba Pneutronics Div Gear Pump Division, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-173-3418 has 3 manufacturer part numbers on file: 55-156-8309 (Parker-Hannifin Corporation Dba Pneutronics Div Gear Pump Division), 55-156-8309 (Brake Supply Company, Inc. Dba Perfection Hydraulics), 0081955 (Lifco Hydraulics Inc).
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.