The Genie 109581GT is a genuine OEM Hex Socket Set Screw with Patch, 1/4-20 x.625, built for Genie GR and GRC Runabout vertical mast lifts and QS QuickStock mast lifts. As a direct OEM replacement, this screw is manufactured to the exact thread pitch, length, and patch specification Genie requires — so it drops straight in without modification. Compatible units include the GRC-12, GR-12, GR-15, GR-20, QS-12R, QS-15R, QS-20R, QS-12W, QS-15W, and QS-20W. Always cross-reference part number 109581GT against your machine's parts manual to confirm it is the correct fastener for your specific unit.
Key Features
- Genuine OEM Thread Conformity — Manufactured to the exact 1/4-20 thread specification and .625 length Genie calls out, ensuring correct torque engagement and secure hold.
- Integrated Patch Locking — The factory-applied patch element resists loosening under vibration, maintaining a firm set without additional locking hardware.
- Direct OEM Replacement — Fits the GRC-12, GR-12, GR-15, GR-20, and the full QS-12, QS-15, and QS-20 line in both R and W configurations with no adaptation needed.
- Broad Mast Lift Coverage — A single part number covers Genie GR and GRC Runabout lifts alongside QS QuickStock models, simplifying parts sourcing across a mixed fleet.
- Fastener Integrity Matters — A set screw that has stripped threads or lost its patch coating can allow components to shift under load. Using the correct OEM fastener keeps assemblies held to specification.
A set screw is a headless fastener threaded fully along its length and driven with a hex socket driver. It is used to lock a component — such as a collar, hub, or bracket — firmly against or onto a mating surface or shaft, preventing rotation or axial movement. The patch coating on this screw acts as a thread-locking feature, adding friction to resist vibration-induced loosening without relying on a separate nut or locking insert. When a set screw loses its patch, becomes stripped, or works loose, the component it secures can shift out of position, potentially affecting the function of the assembly it holds. Replacing a worn or damaged set screw with the correct OEM part restores the holding force the assembly was designed to rely on.
Part Details
| Part Number | 109581GT |
|---|---|
| Brand | Genie |
| Part Type | Genuine OEM |
| Description | Hex Socket Set Screw with Patch, 1/4-20 x .625 |
Compatibility & Fitment
| Name | Model |
|---|---|
| GRC-12 | GRC-12 |
| QS-12R | QS-12R |
| QS-15R | QS-15R |
| QS-20R | QS-20R |
| QS-12W | QS-12W |
| QS-15W | QS-15W |
| QS-20W | QS-20W |
| GR-12 | GR-12 |
| GR-15 | GR-15 |
| GR-20 | GR-20 |
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.
