The Radiator Assembly,oil Cooler, cataloged under National Stock Number 1615-01-125-6959, is classified within Federal Supply Class 1615 (Helicopter Rotor Blades, Drive Mechanisms and Components) of the Aircraft Components and Accessories group. The manufacturer of record is Ametek Thermal Systems Inc. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 1615-01-125-6959 |
| Primary Part Number | 11556-001 |
| Item Name | Radiator Assembly,oil Cooler |
| FSC / FSG | 1615 / 16 — Helicopter Rotor Blades, Drive Mechanisms and Components |
| Manufacturer | Ametek Thermal Systems Inc |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 11556-001 PRIMARY | Ametek Thermal Systems Inc (USA) |
| Reference | Meaning |
|---|---|
| 65397-04008-102 | 7/2 Vendor item drawing reference Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp |
NSN 1615-01-125-6959 is a Radiator Assembly,oil Cooler, manufactured by Ametek Thermal Systems Inc, classified under FSC 1615, Helicopter Rotor Blades, Drive Mechanisms and Components. Status: active.
NSN 1615-01-125-6959 has 1 manufacturer part number on file: 11556-001 (Ametek Thermal Systems Inc).
1 possible match (shared part number, not a government interchangeability claim): 5360-01-443-8047. Verify interchangeability with system specifications before substitution.
Key specifications for 11556-001: End Item Identification: AIRCRAFT MODEL H-53. 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.
NSN 1615-01-125-6959 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.
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.