The Spacer Set,sleeve,main Gear Box, cataloged under National Stock Number 1615-00-979-7950, 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 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1615-00-979-7950 |
| Primary Part Number | 6435-20058-010 |
| Item Name | Spacer Set,sleeve,main Gear Box |
| 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 | SET CONSISTS OF TWO CYLINDRICAL SLEEVES,STEEL,MIL-T-6736,COMP 4130,COND M,TYPE 1,BLACK OXIDE,MIL-C-13924,CLASS 1,DIM.,FIRST SLEEVE 0.114 IN. NOM THK,1.920 IN. MIN,1.922 IN. MAX LG,3.385 IN. OD,3.160 IN. ID,MAX SURFACE FINISH 100 MICROINCHES AA,FOUREQUALLY SPACED HOLES 1.125 IN. DIA ON OD,DIM.,2ND SLEEVE,1.920 IN. MIN,1.922IN. MAX LG,4.320 IN. MIN,4.325 IN. MAXOD,4.060 IN. ID,MAX SURFACE FINISH 100MICROINCHES AA,SIX EQUALLY SPACED HOLES 1.125 IN. DIA ON OD,SPACERS MATCHED SET FOR FREE WHEEL UNIT,TRANSMISSION SYSTEM,MAIN GEAR BOX IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 6435-20058-010 PRIMARY | Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp (USA) |
NSN 1615-00-979-7950 is a Spacer Set,sleeve,main Gear Box, manufactured by Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp, classified under FSC 1615, Helicopter Rotor Blades, Drive Mechanisms and Components. Status: active.
NSN 1615-00-979-7950 has 1 manufacturer part number on file: 6435-20058-010 (Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp).
Key specifications for 6435-20058-010: General Characteristics Item Description: SET CONSISTS OF TWO CYLINDRICAL SLEEVES,STEEL,MIL-T-6736,COMP 4130,COND M,TYPE 1,BLACK OXIDE,MIL-C-13924,CLASS 1,DIM.,FIRST SLEEVE 0.114 IN. NOM THK,1.920 IN. MIN,1.922 IN. MAX LG,3.385 IN. OD,3.160 IN. ID,MAX SURFACE FINISH 100 MICROINCHES AA,FOUREQUALLY SPACED HOLES 1.125 IN. DIA ON OD,DIM.,2ND SLEEVE,1.920 IN. MIN,1.922IN. MAX LG,4.320 IN. MIN,4.325 IN. MAXOD,4.060 IN. ID,MAX SURFACE FINISH 100MICROINCHES AA,SIX EQUALLY SPACED HOLES 1.125 IN. DIA ON OD,SPACERS MATCHED SET FOR FREE WHEEL UNIT,TRANSMISSION SYSTEM,MAIN GEAR BOX IN. 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 1615-00-979-7950 has DEMIL Code B. 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.