The Genie 991940GT is a genuine OEM Nylock Nut, 5/16-18 built for AL5, AL5HT, AL5000, RL4, RL4000, and TML-4000 light towers. As a direct OEM replacement, this nut meets Genie's original specifications for thread size and locking performance, so it installs exactly where the factory fastener did. Cross-reference part number 991940GT against your machine's parts manual to confirm it is the correct fastener for your unit before ordering.
Key Features
- Genuine OEM Fastener Grade — Manufactured to Genie's original dimensional and material standards for the 5/16-18 thread specification, ensuring correct torque retention and locking engagement.
- Nylon-Insert Locking Design — The nylon collar grips the bolt thread under vibration, resisting loosening without the need for thread-locking compounds or additional hardware.
- Exact OEM Replacement — Drops in as a direct replacement for the original fastener, with no modification needed to mating hardware or mounting points.
- Broad Light Tower Fitment — Compatible with AL5, AL5HT, AL5000, RL4, RL4000, and TML-4000 series Genie and Terex light towers, covering a wide range of portable lighting equipment.
- Structural Integrity at Every Joint — A loose or failed nut at a critical joint can allow panels, masts, or mounting brackets to shift during operation; replacing a worn nut promptly keeps every fastened connection secure.
A Nylock nut is a prevailing-torque fastener that uses a nylon insert to create friction against the bolt thread, keeping the nut in place even when the joint is exposed to vibration or repeated movement. On light towers — where masts extend, lamps are repositioned, and equipment is towed between sites — fasteners at structural joints can work loose over time, leading to play in connections that should be rigid. Replacing a worn or damaged nut with the correct OEM part restores the holding force at that joint and prevents further movement that could accelerate wear on surrounding components.
Part Details
| Part Number | 991940GT |
|---|---|
| Brand | Genie |
| Part Type | Genuine OEM |
| Description | Nylock Nut, 5/16-18 |
Compatibility & Fitment
| Name | Model |
|---|---|
| AL5000 | AL5000 |
| RL4000 | RL4000 |
| TML-4000 | TML-4000 |
| AL5 with Vertical Mast | AL5 with Vertical Mast |
| RL4 | RL4 |
| AL5 | AL5 |
| AL5HT | AL5HT |
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.
