The Liner,main Gearbox, cataloged under National Stock Number 1615-01-125-7101, 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 Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp. Government technical data includes 1 specification, cited from the U.S. Government catalog. 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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.
| Parameter | Value |
|---|---|
| NSN | 1615-01-125-7101 |
| Primary Part Number | 64351-11023-138 |
| Item Name | Liner,main Gearbox |
| FSC / FSG | 1615 / 16 — Helicopter Rotor Blades, Drive Mechanisms and Components |
| Manufacturer | Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp |
| Status | ACTIVE |
| General Characteristics Item Description | 4.053 IN. MIN,4.054 IN. MAX OD,3.853 IN. MIN,3.858 IN. MAX ID,0.470 IN. W IN |
| 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 |
|---|---|
| 64351-11023-138 | Airtronics, Llc (USA) |
| 64351-11023-138 PRIMARY | Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp (USA) |
| Reference | Meaning |
|---|---|
| 64351-11023-138 | 5/9 Secondary reference Pcx Aerosystems Enfield, Llc Dba Pcx Aerosystems Enfield Llc |
| 64351-11023-138 | 5/9 Secondary reference Ligi Tool & Engineering, Inc. |
| 64351-11023-138 | 5/9 Secondary reference Capy Machine Shop Inc. Dba Capy Machine Shop Inc |
NSN 1615-01-125-7101 is a Liner,main Gearbox, manufactured by Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp, classified under FSC 1615, Helicopter Rotor Blades, Drive Mechanisms and Components. Status: active.
NSN 1615-01-125-7101 has 2 manufacturer part numbers on file: 64351-11023-138 (Airtronics, Llc), 64351-11023-138 (Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp).
Key specifications for 64351-11023-138: General Characteristics Item Description: 4.053 IN. MIN,4.054 IN. MAX OD,3.853 IN. MIN,3.858 IN. MAX ID,0.470 IN. W IN; End Item Identification: AIRCRAFT MODEL CH-53E. 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.
NSN 1615-01-125-7101 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.