The O-Ring, cataloged under National Stock Number 5331-01-278-5033, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Industrial Heat Transfer, Inc. Dba Industrial Heat Transfer Inc. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Item Name | O-Ring |
| FSC / FSG | 5331 — O-ring (FSG 53) |
| Manufacturers | Industrial Heat Transfer, Inc. Dba Industrial Heat Transfer Inc (CAGE 0ASU6) |
| Parameter | Value |
|---|---|
| NSN | 5331-01-278-5033 |
| Primary Part Number | 2817-5725-02 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Industrial Heat Transfer, Inc. Dba Industrial Heat Transfer Inc |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Part Number | Manufacturer |
|---|---|
| E2817-5700-19 | Industrial Heat Transfer, Inc. Dba Industrial Heat Transfer Inc (USA) |
| 2817-5725-02 PRIMARY | Industrial Heat Transfer, Inc. Dba Industrial Heat Transfer Inc (USA) |
| Reference | Meaning |
|---|---|
| C2817-5725-02 | C/1 Advisory reference — outside the item-of-supply concept Industrial Heat Transfer, Inc. Dba Industrial Heat Transfer Inc |
| C2817-5725-02 | 5/9 Secondary reference Trane U.s. Inc. Dba the Trane Co Div Trane Headquarters |
| 2817-5725-02 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
NSN 5331-01-278-5033 is a O-Ring, manufactured by Industrial Heat Transfer, Inc. Dba Industrial Heat Transfer Inc, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-278-5033 has 2 manufacturer part numbers on file: E2817-5700-19 (Industrial Heat Transfer, Inc. Dba Industrial Heat Transfer Inc), 2817-5725-02 (Industrial Heat Transfer, Inc. Dba Industrial Heat Transfer Inc).
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.