The Genie 124978GT is a genuine OEM Locking Insert Jam Nut, 3/4-16 built for the Genie GRC-12 vertical mast lift. Sourced directly from Genie, this nut meets the original design specifications for the GRC-12 and installs without alteration. Cross-reference part number 124978GT against your machine's parts manual to confirm it is the correct fastener for your application before ordering.
Key Features
- Genuine OEM Dimensional Conformity — Manufactured to Genie's original specifications, with the correct 3/4-16 thread form and locking insert grade to match the fastener position it fills.
- Locking Insert Design — The integrated locking insert resists loosening under vibration and operational load, maintaining the clamping force of the joint over time.
- Direct-Fit Replacement — Engineered to the same thread pitch and profile as the original, this nut installs directly into the GRC-12 without rework or modification.
- GRC-12 Verified Fitment — Confirmed for the Genie GRC-12 Runabout vertical mast lift, so you can order with confidence that you are getting the correct part for your unit.
- Structural Fastener Integrity — A jam nut that has lost its locking ability or is the wrong thread specification can work loose during operation. Replacing it with the correct OEM part restores the joint's holding strength.
A jam nut is a thin, low-profile nut threaded against a primary nut or component to lock it in place and prevent rotation under vibration or dynamic load. The locking insert — typically a nylon or polymer collar — adds a secondary resistance that keeps the fastener from backing off even when the joint experiences repeated movement or shock. On a vertical mast lift like the GRC-12, correctly torqued and properly locking fasteners are essential to keeping structural and mechanical connections secure. A jam nut that is worn, cross-threaded, or missing its locking insert should be replaced promptly to maintain joint integrity throughout the machine's service life.
Part Details
| Part Number | 124978GT |
|---|---|
| Brand | Genie |
| Part Type | Genuine OEM |
| Description | Locking Insert Jam Nut, 3/4-16 |
Compatibility & Fitment
| Name | Models |
|---|---|
| GRC-12 | GRC-12 |
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.
