The Genie 13783GT is a genuine OEM Internal Star Washer designed for the Z-30/20HD and Z-30/20 articulating boom lifts. Sourced directly from Genie, this washer is built to the same specification as the original hardware installed at the factory, ensuring a correct fit within the fastener assembly it serves. Genuine OEM sourcing means this component matches the original material grade, tooth profile, and bore dimension — no guesswork on compatibility for these Z-series machines. Cross-reference part number 13783GT against your parts manual to confirm application before ordering.
Key Features
- Genuine OEM Material Grade — Manufactured to the same hardness and tooth geometry as the original, ensuring the washer bites and locks the way it was designed to.
- Correct Bore Fit — The .313 bore dimension drops directly onto the correct fastener shank with no drilling, reaming, or shimming required.
- Verified Z-Series Compatibility — Confirmed fitment for Z-30/20HD and Z-30/20 articulating boom lifts, so you can order with confidence.
- Prevents Fastener Back-Out — The internal serrations grip the mating surface under vibration and load, maintaining clamp force across the service life of the joint.
- Structural Joint Integrity — On aerial equipment, a loosened fastener caused by a failed locking washer can compromise structural connections; using the correct OEM component keeps critical joints secure and the machine operating safely at height.
An internal star washer is a hardened locking washer with serrated teeth on its inner edge. When a fastener is tightened, those teeth bite into both the bolt head or nut face and the mating surface, creating a mechanical resistance that prevents the fastener from vibrating loose over time. On articulating boom lifts like the Z-30/20 series, which experience repeated extension cycles, platform movement, and jobsite vibration, maintaining consistent clamp force across structural and mechanical joints is critical. A worn, deformed, or missing star washer allows fasteners to back out gradually, which can lead to joint slippage, accelerated wear on adjacent components, or fastener failure if left unaddressed.
Part Details
| Part Number | 13783GT |
|---|---|
| Brand | Genie |
| Part Type | Genuine OEM |
| Description | Internal Star Washer, .313 |
Compatibility & Fitment
| Name | Model |
|---|---|
| Z-30/20HD | Z-30/20HD |
| Z-30/20 | Z-30/20 |
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.
