The Gear,helical, cataloged under National Stock Number 3020-01-017-3972, 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 Astec America Inc.. Government technical data includes 20 specifications, 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 | 3020-01-017-3972 |
| Primary Part Number | 354-18201 |
| Item Name | Gear,helical |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Astec America Inc. |
| Status | ACTIVE |
| Keyway Nominal Width | 0.120 INCHES BOTH ENDS IN |
| Bore Nominal Diameter | 0.621 INCHES BOTH ENDS IN |
| Helix Angle | 17.0000 DEGREES |
| Hub Nominal Diameter | 1.140 INCHES SECOND END IN |
| Hub Nominal Diameter | 1.130 INCHES FIRST END IN |
| Teeth Quantity | 36 |
| Body Style | WEBBED, SOLID |
| Tooth Direction | LEFT |
| Bore Style | W/ KEYWAY BOTH ENDS |
| Nominal Distance Between Body Face and Protruding Hub End | 0.372 INCHES FIRST END IN |
| Teeth Type | SINGLE HELIX |
| Style Designator | ONE PROTRUDING HUB, ONE FLUSH HUB |
| Pitch Diameter | 3.1850 INCHES NOMINAL IN |
| Tooth Form | STANDARD |
| Hub Style Designator | PLAIN BOTH ENDS |
| Nominal Outside Diameter | 3.422 INCHES IN |
| Nominal Distance From Bore Center to Keyway Bottom | 0.046 INCHES BOTH ENDS IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL OVERALL |
| Face Nominal Width | 0.628 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 |
|---|---|
| 354-18201 PRIMARY | Astec America Inc. (USA) |
NSN 3020-01-017-3972 is a Gear,helical, manufactured by Astec America Inc., classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-017-3972 has 1 manufacturer part number on file: 354-18201 (Astec America Inc.).
Key specifications for 354-18201: Keyway Nominal Width: 0.120 INCHES BOTH ENDS IN; Bore Nominal Diameter: 0.621 INCHES BOTH ENDS IN; Helix Angle: 17.0000 DEGREES; Hub Nominal Diameter: 1.140 INCHES SECOND END IN. 20 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.