The Gearshaft,spur, cataloged under National Stock Number 3040-00-167-4157, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp. Government technical data includes 14 specifications, 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-00-167-4157 |
| Primary Part Number | 65850-05128-101 |
| Item Name | Gearshaft,spur |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp |
| Status | ACTIVE |
| Shaft Type | SHOULDERED |
| Shaft Material | STEEL |
| Shaft Largest Diameter | 2.420 INCHES NOMINAL IN |
| Shaft End Size | 0.648 INCHES IN |
| Teeth Quantity | 37 |
| Diametral Pitch | 14 |
| Gear Outside Diameter | 2.783 INCHES MINIMUM AND 2.786 INCHES MAXIMUM IN |
| Longer Shaft Segment Length | 3.190 INCHES MINIMUM AND 3.196 INCHES MAXIMUM IN |
| Hardness Rating | 43.0 ROCKWELL C MINIMUM AND 46.0 ROCKWELL C MAXIMUM OVERALL |
| Gear Material | STEEL |
| Shaft End Type | SPLINED INVOLUTE |
| Gear Location on Shaft | OFF CENTER BETWEEN ENDS OF SHAFT |
| Pressure Angle | 25.0000 DEGREES |
| Face Width | 1.130 INCHES NOMINAL IN |
| 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 |
|---|---|
| 65850-05128-101 PRIMARY | Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp (USA) |
| 65850-05128-101 | B. & R. Machine & Tool Corp (USA) |
| Reference | Meaning |
|---|---|
| 65850-05128-101 | 5/2 Secondary reference U.S. Government activity |
NSN 3040-00-167-4157 is a Gearshaft,spur, manufactured by Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-00-167-4157 has 2 manufacturer part numbers on file: 65850-05128-101 (Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp), 65850-05128-101 (B. & R. Machine & Tool Corp).
Key specifications for 65850-05128-101: Shaft Type: SHOULDERED; Shaft Material: STEEL; Shaft Largest Diameter: 2.420 INCHES NOMINAL IN; Shaft End Size: 0.648 INCHES IN. 14 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.
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.