The O-Ring, cataloged under National Stock Number 5331-01-588-0439, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Thermo King Corp. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5331-01-588-0439 |
| Primary Part Number | 33-1015 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Thermo King Corp |
| 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 |
|---|---|
| 33-1015 PRIMARY | Thermo King Corp (USA) |
| Reference | Meaning |
|---|---|
| 798331931904 | 6/9 Informative reference only Ncb Hungary (honvedsegi Egyseges Termekkod) |
NSN 5331-01-588-0439 is a O-Ring, manufactured by Thermo King Corp, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-588-0439 has 1 manufacturer part number on file: 33-1015 (Thermo King Corp).
1 possible match (shared part number, not a government interchangeability claim): 5331-01-590-8487. Verify interchangeability with system specifications before substitution.
Key specifications for 33-1015: End Item Identification: 4130-01-565-7655 SMALL FIELD REFRIGERATION SYSTEM. 0 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.