The O-Ring, cataloged under National Stock Number 5331-01-479-0634, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Parker-Hannifin Corp Div O-Ring Division. Government technical data includes 2 specifications, cited from the U.S. Government catalog. The record lists 3 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5331-01-479-0634 |
| Primary Part Number | 2-018 N0552 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Parker-Hannifin Corp Div O-Ring Division |
| Status | ACTIVE |
| Cross-Sectional Height | 0.750 INCHES NOMINAL IN |
| Center Hole Diameter | 0.740 INCHES NOMINAL IN |
| 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 |
|---|---|
| 2-018 N0552 | Cdk Mobile Systems Inc (USA) |
| 2-018 N0552 PRIMARY | Parker-Hannifin Corp Div O-Ring Division (USA) |
| 1KK498 | Oshkosh Defense Llc (USA) |
| Reference | Meaning |
|---|---|
| 1KK498 | 5/9 Secondary reference Oshkosh Corp |
NSN 5331-01-479-0634 is a O-Ring, manufactured by Parker-Hannifin Corp Div O-Ring Division, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-479-0634 has 3 manufacturer part numbers on file: 2-018 N0552 (Cdk Mobile Systems Inc), 2-018 N0552 (Parker-Hannifin Corp Div O-Ring Division), 1KK498 (Oshkosh Defense Llc).
Key specifications for 2-018 N0552: Cross-Sectional Height: 0.750 INCHES NOMINAL IN; Center Hole Diameter: 0.740 INCHES NOMINAL IN; End Item Identification: 3990-01-444-6174 BITUM DISTRIBUTOR; 4210-01-622-0440; 2320-01-652-5218 JOINT LIGHT TACTICAL VEHICLE (JLTV). 2 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.