The Gear,helical, cataloged under National Stock Number 3020-01-054-9529, 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 Secs Inc. Government technical data includes 19 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 3020-01-054-9529 |
| Primary Part Number | 874144-1 |
| Item Name | Gear,helical |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Secs Inc |
| Status | ACTIVE |
| Keyway Nominal Width | 0.063 INCHES BOTH ENDS IN |
| Bore Nominal Diameter | 0.276 INCHES BOTH ENDS IN |
| Helix Angle | 21.0000 DEGREES |
| Hub Nominal Diameter | 0.460 INCHES FIRST END IN |
| Teeth Quantity | 61 |
| Body Style | PLAIN, SOLID |
| Tooth Direction | RIGHT |
| Bore Style | W/ KEYWAY BOTH ENDS |
| Nominal Distance Between Body Face and Protruding Hub End | 0.164 INCHES FIRST END IN |
| Teeth Type | SINGLE HELIX |
| Style Designator | PROTRUDING HUB |
| Material Document and Classification | MIL-S-5000 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 1.0268 INCHES NOMINAL IN |
| Tooth Form | STANDARD |
| Hub Style Designator | PLAIN FIRST END |
| Nominal Outside Diameter | 1.0604 INCHES IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL COMP 4340 OVERALL |
| Face Nominal Width | 0.250 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 |
NSN 3020-01-054-9529 is a Gear,helical, manufactured by Secs Inc, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-054-9529 has 2 manufacturer part numbers on file: 874144-1 (Superior Motion Controls, Inc. Dba Superior Motion Controls), 874144-1 (Secs Inc).
Key specifications for 874144-1: Keyway Nominal Width: 0.063 INCHES BOTH ENDS IN; Bore Nominal Diameter: 0.276 INCHES BOTH ENDS IN; Helix Angle: 21.0000 DEGREES; Hub Nominal Diameter: 0.460 INCHES FIRST END IN. 19 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.