The O-Ring, cataloged under National Stock Number 5331-01-537-0222, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. Government technical data includes 1 specification, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5331-01-537-0222 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Status | ACTIVE |
| Material | RUBBER FLUOROCARBON CLASS FPM |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 1431-1-1/2IN O-RING SEAL | 3/9 Design control — primary reference Ernst Flow Industries |
NSN 5331-01-537-0222 is a O-Ring, classified under FSC 5331, O-ring. Status: active.
Key specifications for 5331-01-537-0222: Special Features: ORDER BY SPECIFYING MODEL 1431 1 1/2IN BRONZE BODY O-RING SEAL IN; Part Name Assigned by Controlling Agency: O-RING SEAL; End Item Identification: 1 1/2 INCH LIQUID SIGHT INDICATOR;NSN 6680-01-536-9835 IN; Material: RUBBER FLUOROCARBON CLASS FPM. 1 specification is 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.