The O-Ring, cataloged under National Stock Number 5331-01-589-1857, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Southwest Thermal Technology Incorporated. Government technical data includes 1 specification, 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5331-01-589-1857 |
| Primary Part Number | 302-1091 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Southwest Thermal Technology Incorporated |
| 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 |
| Part Number | Manufacturer |
|---|---|
| 302-1091 | Southwest Thermal Technology Incorporated (USA) |
| Reference | Meaning |
|---|---|
| 302-1091 | 3/9 Design control — primary reference American Industrial Heat Transfer, Inc. |
NSN 5331-01-589-1857 is a O-Ring, manufactured by Southwest Thermal Technology Incorporated, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-589-1857 has 1 manufacturer part number on file: 302-1091 (Southwest Thermal Technology Incorporated).
Key specifications for 302-1091: End Item Identification: 4420-01-578-2232; 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.