The O-Ring, cataloged under National Stock Number 5331-01-278-5035, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Trane U.s. Inc. Dba the Trane Co Div Trane Headquarters. 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). 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); Trane U.s. Inc. Dba the Trane Co Div Trane Headquarters (CAGE 60532) |
| Parameter | Value |
|---|---|
| NSN | 5331-01-278-5035 |
| Primary Part Number | C2817-5725-01 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Trane U.s. Inc. Dba the Trane Co Div Trane Headquarters |
| 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 |
|---|---|
| 2817-5725-01 | Industrial Heat Transfer, Inc. Dba Industrial Heat Transfer Inc (USA) |
| C2817-5725-01 PRIMARY | Trane U.s. Inc. Dba the Trane Co Div Trane Headquarters (USA) |
| Reference | Meaning |
|---|---|
| E2817-5700-22 | 5/9 Secondary reference Industrial Heat Transfer, Inc. Dba Industrial Heat Transfer Inc |
| C2817-5725-01 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
| 2817-5725-01 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
NSN 5331-01-278-5035 is a O-Ring, manufactured by Trane U.s. Inc. Dba the Trane Co Div Trane Headquarters, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-278-5035 has 2 manufacturer part numbers on file: 2817-5725-01 (Industrial Heat Transfer, Inc. Dba Industrial Heat Transfer Inc), C2817-5725-01 (Trane U.s. Inc. Dba the Trane Co Div Trane Headquarters).
1 possible match (shared part number, not a government interchangeability claim): 5331-01-596-7470. Verify interchangeability with system specifications before substitution.
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.