The Genie 990470GT Lock Washer, 3/8 ZP is a genuine OEM fastener designed for Genie and Terex portable light towers, including the AL4000, AL5000, RL4000, TML-4000, and related AL and RL series models. As a direct OEM replacement, this lock washer is manufactured to the same specifications as the original hardware installed at the factory, ensuring consistent performance across the full range of compatible units. Cross-reference part number 990470GT against your parts manual to confirm the correct application for your specific light tower configuration. Keep a spare on hand to keep scheduled maintenance and field repairs moving without delays.
Key Features
- Genuine OEM Hardware Grade — Zinc-plated 3/8" construction meets the original material and corrosion-resistance spec, delivering the same holding integrity as the part it replaces.
- Direct-Fit Replacement — Sized and formed to drop straight into existing fastener assemblies on compatible light towers, eliminating guesswork during installation.
- Broad Light Tower Compatibility — Fits a wide range of Genie and Terex portable light towers across the AL, RL, and TML families, including vertical mast and LED mast variants.
- Secure Fastener Retention — The lock washer's design resists loosening from vibration and load cycling, maintaining bolt tension through extended generator and lighting operation.
- Electrical and Structural Safety Relevance — Properly retained fasteners are critical on light towers where vibration during transport and generator operation can work bolts loose over time, making this a meaningful part of routine preventive maintenance.
A lock washer is placed under a bolt or nut to prevent the fastener from backing out under vibration or repeated mechanical stress. On portable light towers, which experience significant vibration during road transport and continuous engine operation, fastener loosening is a genuine service concern. When a lock washer is worn, deformed, or missing, bolts in structural, electrical, and mechanical assemblies can work loose, leading to misalignment, component damage, or unsafe operating conditions. Replacing worn hardware with the correct OEM-spec lock washer restores the clamping integrity the assembly was designed to maintain.
Part Details
| Part Number | 990470GT |
|---|---|
| Brand | Genie |
| Part Type | Genuine OEM |
| Description | Lock Washer, 3/8 ZP |
Compatibility & Fitment
| Name | Model |
|---|---|
| AL4000 | AL4000 |
| AL5000 | AL5000 |
| RL4000 | RL4000 |
| TML-4000 | TML-4000 |
| AL5 with Vertical Mast | AL5 with Vertical Mast |
| RL4 Vertical Mast | RL4 Vertical Mast |
| RL4 LED Vertical Mast | RL4 LED Vertical Mast |
| AL4 | AL4 |
| RL4 | RL4 |
| AL5 | AL5 |
| AL4L | AL4L |
| AL5L | AL5L |
| 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.
