The Gear,helical, cataloged under National Stock Number 3020-00-294-7527, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions. Government technical data includes 24 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-294-7527 |
| Primary Part Number | 3-412381-3 |
| Item Name | Gear,helical |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions |
| Status | ACTIVE |
| Bore Nominal Diameter | 1.1560 INCHES BOTH ENDS IN |
| Helix Angle | 8.6831 DEGREES |
| Hub Nominal Diameter | 2.188 INCHES FIRST END IN |
| Hub Nominal Diameter | 1.876 INCHES SECOND END IN |
| Teeth Quantity | 22 |
| Body Style | PLAIN, SOLID |
| Tooth Direction | RIGHT |
| Bore Style | PLAIN BOTH ENDS |
| Mounting Hole Type and Quantity | 3 THREADED AXIALLY THROUGH BODY FIRST END |
| Nominal Distance Between Body Face and Protruding Hub End | 0.562 INCHES FIRST END IN |
| Nominal Distance Between Body Face and Protruding Hub End | 0.188 INCHES SECOND END IN |
| Teeth Type | SINGLE HELIX |
| Style Designator | PROTRUDING HUBS |
| Pitch Diameter | 2.6300 INCHES NOMINAL IN |
| Hub Style Designator | PLAIN BOTH ENDS |
| Mounting Hole Nominal Thread Size | 0.190 INCHES AXIALLY THROUGH BODY FIRST END IN |
| Nominal Outside Diameter | 2.8700 INCHES IN |
| Mounting Hole Thread Quantity Per Inch | 24 AXIALLY THROUGH BODY FIRST END |
| Pressure Angle | 14.5000 DEGREES |
| Material | COPPER ALLOY OVERALL |
| Bolt Hole Circle Nominal Diameter | 1.500 INCHES AXIALLY THROUGH BODY FIRST END IN |
| Mounting Hole Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) AXIALLY THROUGH BODY FIRST END |
| Attachment Method | MOUNTING HOLE |
| Face Nominal Width | 0.312 INCHES 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 |
|---|---|
| 3-412381-3 PRIMARY | Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions (USA) |
| 29C2563-5-3100 PRIMARY | Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions (USA) |
| Reference | Meaning |
|---|---|
| 3-412381-3 | 5/9 Secondary reference Siemens Government Technologies, Inc. Dba Sgt Dresser-Rand Div Sgt Dresser-Rand |
| 29C2563-5-3100 | 5/9 Secondary reference Siemens Government Technologies, Inc. Dba Sgt Dresser-Rand Div Sgt Dresser-Rand |
| 3-412381-3 | 5/9 Secondary reference Tuthill Corporation Div Coppus Portable Ventilation Division |
| 29C2563-5-3100 | 3/9 Design control — primary reference Tuthill Corporation Div Coppus Portable Ventilation Division |
NSN 3020-00-294-7527 is a Gear,helical, manufactured by Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-294-7527 has 2 manufacturer part numbers on file: 3-412381-3 (Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions), 29C2563-5-3100 (Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions).
Key specifications for 3-412381-3: Bore Nominal Diameter: 1.1560 INCHES BOTH ENDS IN; Helix Angle: 8.6831 DEGREES; Hub Nominal Diameter: 2.188 INCHES FIRST END IN; Hub Nominal Diameter: 1.876 INCHES SECOND END IN. 24 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.