The O-Ring, cataloged under National Stock Number 5331-01-390-9656, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Interspiro Inc. Government technical data includes 4 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5331-01-390-9656 |
| Primary Part Number | 336-190-221 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Interspiro Inc |
| Status | ACTIVE |
| Cross-Sectional Height | 1.6 MILLIMETERS NOMINAL MM |
| Criticality Code Justification | MATT AND ADYT AND ADVN |
| Center Hole Diameter | 6.1 MILLIMETERS NOMINAL MM |
| Material | RUBBER BUTADIENE NITRILE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | Y |
| Part Number | Manufacturer |
|---|---|
| 336-190-221 PRIMARY | Interspiro Inc (USA) |
| 336190221 | Interspiro Gmbh (DEU) |
NSN 5331-01-390-9656 is a O-Ring, manufactured by Interspiro Inc, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-390-9656 has 2 manufacturer part numbers on file: 336-190-221 (Interspiro Inc), 336190221 (Interspiro Gmbh).
Key specifications for 336-190-221: Cross-Sectional Height: 1.6 MILLIMETERS NOMINAL MM; Criticality Code Justification: MATT AND ADYT AND ADVN; Center Hole Diameter: 6.1 MILLIMETERS NOMINAL MM; Material: RUBBER BUTADIENE NITRILE. 4 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.