The O-Ring, cataloged under National Stock Number 5331-01-721-7009, 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. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 Corp Div O-Ring Division (CAGE 02697); Parker Brownsville Servicio S.a. De C.v. (CAGE SE397) |
| Parameter | Value |
|---|---|
| NSN | 5331-01-721-7009 |
| Primary Part Number | 8635043-2 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Parker-Hannifin Corp Div O-Ring Division |
| Status | ACTIVE |
| 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 |
|---|---|
| 8635043-2 PRIMARY | Parker-Hannifin Corp Div O-Ring Division (USA) |
| 8635043-2 | Parker Brownsville Servicio S.a. De C.v. (MEX) |
| Reference | Meaning |
|---|---|
| 8635043 | D/9 Drawing number reference only Naval Sea Systems Command |
| N0507 A5510-118 | 5/9 Secondary reference Staver Hydraulics Co Inc |
| N0507 A5510-118 | 5/9 Secondary reference Parker-Hannifin Corp Div O-Ring Division |
| 8635043-2 | 7/2 Vendor item drawing reference Naval Sea Systems Command |
NSN 5331-01-721-7009 is a O-Ring, manufactured by Parker-Hannifin Corp Div O-Ring Division, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-721-7009 has 2 manufacturer part numbers on file: 8635043-2 (Parker-Hannifin Corp Div O-Ring Division), 8635043-2 (Parker Brownsville Servicio S.a. De C.v.).
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.