The Gear,helical, cataloged under National Stock Number 3020-00-706-2172, 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 Honeywell Intl Inc Defense Avionics Systems. Government technical data includes 30 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-706-2172 |
| Primary Part Number | 1271462-1 |
| Item Name | Gear,helical |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Honeywell Intl Inc Defense Avionics Systems |
| Status | ACTIVE |
| Helix Angle | 23.0000 DEGREES |
| Hub Nominal Diameter | 5.625 INCHES SECOND END IN |
| Teeth Quantity | 153 |
| Body Style | WEBBED, SOLID |
| Tooth Direction | LEFT |
| Bore Style | TAPERED SECOND END |
| Mounting Hole Type and Quantity | 6 COUNTERBORED AND 4 PLAIN AND 4 THREADED AXIALLY THROUGH BODY FIRST END |
| Nominal Distance Between Body Face and Protruding Hub End | 0.264 INCHES FIRST END IN |
| Nominal Distance Between Body Face and Protruding Hub End | 0.223 INCHES SECOND END IN |
| First Step Nominal Length | 0.093 INCHES FIRST END IN |
| Mounting Hole Nominal Diameter | 0.270 INCHES AND 0.563 INCHES AXIALLY THROUGH BODY FIRST END IN |
| Teeth Type | SINGLE HELIX |
| Hardness Rating | 48.0 ROCKWELL C MINIMUM AND 54.0 ROCKWELL C MAXIMUM TEETH |
| Style Designator | PROTRUDING HUBS |
| Taper Major Nominal Diameter | 4.501 INCHES SECOND END IN |
| Material Document and Classification | QQ-S-624 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 13.8491 INCHES MINIMUM AND 13.8511 INCHES MAXIMUM IN |
| Tooth Form | STANDARD |
| First Step Nominal Diameter | 7.500 INCHES FIRST END IN |
| Hub Style Designator | 1 STEP FIRST END |
| Hub Style Designator | PLAIN SECOND END |
| Mounting Hole Nominal Thread Size | 0.375 INCHES AXIALLY THROUGH BODY FIRST END IN |
| End Nominal Length | 0.171 INCHES FIRST END IN |
| Nominal Outside Diameter | 14.015 INCHES IN |
| End Nominal Diameter | 4.875 INCHES FIRST END IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL COMP 4340 OVERALL |
| Bolt Hole Circle Nominal Diameter | 6.625 INCHES AND 11.500 INCHES AND 5.062 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 |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
NSN 3020-00-706-2172 is a Gear,helical, manufactured by Honeywell Intl Inc Defense Avionics Systems, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-706-2172 has 2 manufacturer part numbers on file: 1271462-1 (Honeywell Intl Inc Defense Avionics Systems), 9053918 (Us Army Aviation and Missile Command).
Key specifications for 1271462-1: Helix Angle: 23.0000 DEGREES; Hub Nominal Diameter: 5.625 INCHES SECOND END IN; Teeth Quantity: 153; Body Style: WEBBED, SOLID. 30 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.
NSN 3020-00-706-2172 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.