The Gear,worm, cataloged under National Stock Number 3020-01-005-1024, 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 Altra Industrial Motion Corp.. Government technical data includes 15 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-01-005-1024 |
| Primary Part Number | GH1056LH |
| Item Name | Gear,worm |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Altra Industrial Motion Corp. |
| Status | ACTIVE |
| Thread Form Direction | LEFT-HAND |
| Bore Nominal Diameter | 0.500 INCHES FIRST END IN |
| Helix Angle | 4.7666 DEGREES |
| Hub Nominal Diameter | 0.750 INCHES FIRST END IN |
| Bore Style | PLAIN BOTH ENDS |
| Nominal Distance Between Body Face and Protruding Hub End | 0.375 INCHES FIRST END IN |
| Face Type | STRAIGHT |
| Style Designator | PROTRUDING HUB |
| Pitch Diameter | 1.0000 INCHES NOMINAL IN |
| Hub Style Designator | PLAIN FIRST END |
| Thread Form Quantity | 1 |
| Nominal Outside Diameter | 1.164 INCHES IN |
| Pressure Angle | 14.5000 DEGREES |
| Material | STEEL OVERALL |
| Face Nominal Width | 1.125 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 |
|---|---|
| GH1056LH PRIMARY | Altra Industrial Motion Corp. (USA) |
| Reference | Meaning |
|---|---|
| 3021739 | D/9 Drawing number reference only Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
| 3021739-1 | 7/2 Vendor item drawing reference Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
NSN 3020-01-005-1024 is a Gear,worm, manufactured by Altra Industrial Motion Corp., classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-005-1024 has 1 manufacturer part number on file: GH1056LH (Altra Industrial Motion Corp.).
Key specifications for GH1056LH: Thread Form Direction: LEFT-HAND; Bore Nominal Diameter: 0.500 INCHES FIRST END IN; Helix Angle: 4.7666 DEGREES; Hub Nominal Diameter: 0.750 INCHES FIRST END IN. 15 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.