The Genie 44780GT is a genuine OEM Castle Nut, 1.125-18 UNEF built for Genie GS scissor lifts and select Genie Z articulating boom lifts. As a factory-sourced part, it meets the exact dimensional and material standards set by Genie, ensuring a correct fit without modification. This nut is confirmed compatible across a broad range of GS series scissor lifts — including GS-1530, GS-1930, GS-2646, GS-4047, GS-2668 RT, GS-2668 DC, and related models — as well as select Z-series machines including the Z-25/8, Z-20/8, and Z-20/8N. Cross-reference part number 44780GT against your machine's parts manual before ordering to confirm it is the correct item for your unit.
Key Features
- Genuine OEM Conformity — Sourced directly from Genie, this castle nut is manufactured to the precise thread specification (1.125-18 UNEF) and material grade required for the application, with no dimensional compromise.
- Exact Thread Match — The 1.125-18 UNEF thread form engages correctly with mating fasteners on the machine, seating fully and holding torque without risk of cross-threading or misfit.
- Broad GS Series Coverage — Fits a wide range of Genie GS scissor lifts, from compact slab models to rough-terrain and DC-drive variants, as well as select Genie Z articulating boom lifts.
- Cotter Pin Retention — The castle profile accepts a cotter pin or safety wire through the castellations, locking the nut in position under vibration and cyclic loading — a key function wherever positive retention is required.
- Direct OEM Replacement — Installs in place of the original without rework, keeping the assembly within spec and maintaining the integrity of the fastened joint.
A castle nut is a hex nut with slots — or castellations — cut into one end, designed to be used with a cotter pin or safety wire that passes through a matching hole in the bolt or shaft. This arrangement prevents the nut from backing off under vibration or dynamic loading, making it a common choice for pivot pins, axle ends, and other joints that see repeated movement. When a castle nut is worn, damaged, or missing its cotter pin, the joint it secures can loosen progressively, leading to play in the assembly and potential structural failure at the connection point. Replacing a damaged nut with the correct OEM part restores the fastened joint to its original specification.
Part Details
| Part Number | 44780GT |
|---|---|
| Brand | Genie |
| Part Type | Genuine OEM |
| Description | Castle Nut, 1.125-18 UNEF |
Compatibility & Fitment
| Name | Models |
|---|---|
| GS-30 | GS-30 |
| GS-32 | GS-32 |
| GS-46 | GS-46 |
| GS-1530 | GS-1530 |
| GS-1532 | GS-1532 |
| GS-1930 | GS-1930 |
| GS-1932 | GS-1932 |
| GS-2032 | GS-2032 |
| GS-2046 | GS-2046 |
| GS-2632 | GS-2632 |
| GS-2646 | GS-2646 |
| GS-2668 DC | GS-2668 DC |
| GS-2668 RT | GS-2668 RT |
| GS-3232 | GS-3232 |
| GS-3246 | GS-3246 |
| GS-3268 DC | GS-3268 DC |
| GS-3268 RT | GS-3268 RT |
| GS-4047 | GS-4047 |
| Z-20/8 | Z-20/8 |
| Z-20/8N | Z-20/8N |
| Z-25/8 | Z-25/8 |
Verify Before You Order
Fitment is machine-number and revision-specific; always confirm your model and serial number against the fitment list.
Why Buy From DHS Equipment
Every part is verified against the manufacturer's part number before it ships, so what you order is what arrives. We carry parts from leading OEM brands and our own DHS Quality Parts line of professional aftermarket components. Need help finding the right part? Our team is available to confirm compatibility whenever you need it. Orders are processed fast to keep your jobs on track. We don't just sell parts. We keep you jobsite ready.
Questions? Contact our team at [email protected] or 866-611-9369 — DHS Equipment is here to help you maintain peak performance.
