The Duct,flex, cataloged under National Stock Number 1650-01-667-2142, is classified within Federal Supply Class 1650 (Aircraft Hydraulic, Vacuum, and De-icing System Components) of the Aircraft Components and Accessories group. The manufacturer of record is Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp. 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1650-01-667-2142 |
| Primary Part Number | 06375-04801-111 |
| Item Name | Duct,flex |
| FSC / FSG | 1650 / 16 — Aircraft Hydraulic, Vacuum, and De-icing System Components |
| Manufacturer | Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp |
| Status | ACTIVE |
| Functional Description | THE FLEX DUCT ON THE MGB OIL COOLER ALLOWS AIR TO FLOW FROM THE OIL COOLER BLOWER TO THE RADIATOR SECTION WHILE ALSO ALLOWING THE TWO TO MOVE DYNAMICALLY RELATIVE TO EACH OTHER |
| 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 |
|---|---|
| 06375-04801-111 PRIMARY | Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp (USA) |
NSN 1650-01-667-2142 is a Duct,flex, manufactured by Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp, classified under FSC 1650, Aircraft Hydraulic, Vacuum, and De-icing System Components. Status: active.
NSN 1650-01-667-2142 has 1 manufacturer part number on file: 06375-04801-111 (Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp).
Key specifications for 06375-04801-111: Special Features: PART OF DRIVE SYSTEMS (HELO ONLY); TRANSMISSION OIL COOLER ASSY; Functional Description: THE FLEX DUCT ON THE MGB OIL COOLER ALLOWS AIR TO FLOW FROM THE OIL COOLER BLOWER TO THE RADIATOR SECTION WHILE ALSO ALLOWING THE TWO TO MOVE DYNAMICALLY RELATIVE TO EACH OTHER; Part Name Assigned by Controlling Agency: DUCT, FLEX, MG BOC; End Item Identification: CH-53K. 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.