The O-Ring, cataloged under National Stock Number 5331-01-331-1290, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Interspiro Inc. The record lists 4 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 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 Corp Div O-Ring Division (CAGE 02697); Interspiro Inc (CAGE 47432); Naval Sea Systems Command (CAGE 53711) |
| Parameter | Value |
|---|---|
| NSN | 5331-01-331-1290 |
| Primary Part Number | 944-610-221 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Interspiro Inc |
| 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 |
|---|---|
| 9-276 | Parker-Hannifin Corp Div O-Ring Division (USA) |
| 944-610-221 PRIMARY | Interspiro Inc (USA) |
| 336-190-222(5PK) | Interspiro Inc (USA) |
| 6317998 | Naval Sea Systems Command (USA) |
NSN 5331-01-331-1290 is a O-Ring, manufactured by Interspiro Inc, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-331-1290 has 4 manufacturer part numbers on file: 9-276 (Parker-Hannifin Corp Div O-Ring Division), 944-610-221 (Interspiro Inc), 336-190-222(5PK) (Interspiro Inc), 6317998 (Naval Sea Systems Command).
1 possible match (shared part number, not a government interchangeability claim): 5330-01-553-3084. 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.