The O-Ring, cataloged under National Stock Number 5331-01-503-8944, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Enviro Systems Inc. Government technical data includes 3 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5331-01-503-8944 |
| Primary Part Number | 901V912-908 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Enviro Systems Inc |
| Status | ACTIVE |
| Cross-Sectional Height | 0.087 INCHES NOMINAL IN |
| Center Hole Diameter | 0.644 INCHES NOMINAL IN |
| Material | RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR |
| 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 |
|---|---|
| 901V912-908 | Enviro Systems Inc (USA) |
| Reference | Meaning |
|---|---|
| 901V912-908 | 3/9 Design control — primary reference Aero Aire Corporation |
NSN 5331-01-503-8944 is a O-Ring, manufactured by Enviro Systems Inc, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-503-8944 has 1 manufacturer part number on file: 901V912-908 (Enviro Systems Inc).
Key specifications for 901V912-908: Cross-Sectional Height: 0.087 INCHES NOMINAL IN; Special Features: MATERIAL HNBR; Center Hole Diameter: 0.644 INCHES NOMINAL IN; End Item Identification: 1520-01-459-9468;HELICOPTER UTILITY. 3 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.