The Genie 990200GT Nylock Nut, 1/2-13 GR2 is a genuine OEM fastener built for Genie and Terex AL and RL series light towers, including the AL4000, AL5000, AL4, AL5, AL5HT, AL4L, AL5L, RL4000, RL4, and RL4 LED Vertical Mast models. As a direct OEM replacement, this nut is manufactured to the same grade 2 specification as the original hardware, ensuring the same dimensional and torque characteristics. Cross-reference part number 990200GT against your machine's parts manual to confirm it is the correct fastener for your application before ordering.
Key Features
- Grade 2 Nylon-Insert Construction — The nylon collar locks the nut against loosening under vibration, meeting the same GR2 material specification as the original fastener.
- Exact 1/2-13 Thread Fit — Machined to the 1/2-13 UNC thread standard for a direct drop-in installation with no reworking of the mating stud or bolt.
- Genuine OEM Part — Sourced directly from Genie, this fastener carries the same part number 990200GT used in the factory build, so you are ordering the identical component.
- Broad Light Tower Coverage — Fits the full AL and RL family range, including AL4000, AL5000, AL5HT, RL4000, RL4, and RL4 LED Vertical Mast units, among others.
- Vibration Resistance Where It Counts — A failed or missing locking fastener on a towable light tower can allow structural or mechanical connections to work loose during transit or operation; the nylon insert keeps critical joints secured.
A Nylock nut uses a nylon insert embedded in the top of the nut to create friction against the bolt thread, preventing the nut from backing off under vibration or repeated load cycling. On towable light towers that are regularly hauled between job sites, fasteners at structural, mast, and mechanical attachment points are exposed to continuous road vibration and setup forces. When a locking nut loses its holding ability — through wear, deformation, or simple loss — the joint it secures can loosen progressively, leading to instability or component damage. Replacing a worn or missing nut with the correct this part ensures the joint returns to its original holding specification.
Part Details
| Part Number | 990200GT |
|---|---|
| Brand | Genie |
| Part Type | Genuine OEM |
| Description | Nylock Nut, 1/2-13 GR2 |
Compatibility & Fitment
| Name | Models |
|---|---|
| AL4 | AL4 |
| AL4L | AL4L |
| AL5 | AL5 |
| AL5 with Vertical Mast | AL5 with Vertical Mast |
| AL5HT | AL5HT |
| AL5L | AL5L |
| AL4000 | AL4000 |
| AL5000 | AL5000 |
| RL4 | RL4 |
| RL4 LED Vertical Mast | RL4 LED Vertical Mast |
| RL4 Vertical Mast | RL4 Vertical Mast |
| RL4000 | RL4000 |
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.
