The Genie 1256457GT is a genuine OEM Lock Washer, M6, ZAB designed for a wide range of Genie telescopic and articulating boom lifts as well as GTH telehandlers. Sourced directly from Genie, this washer meets the same material and finish standards as the hardware installed at the factory — giving you a direct, like-for-like replacement every time. This Lock Washer fits models across the SX, S, and Z series families, including the SX-105 XC, SX-125 XC, S-60 DC, S-80 XC, S-85 XC, Z-45/25J, Z-60/37 DC, ZX-135/70, Z-80/60, and GTH-636, among others. Cross-reference part number 1256457GT against your Genie parts manual before ordering to confirm the correct application for your specific machine.
Key Features
- Genuine OEM Hardware Grade — Manufactured to Genie's material and zinc-alloy-baked (ZAB) finish specification, ensuring the correct hardness, corrosion resistance, and clamping behavior for the fastener joints it secures.
- M6 Metric Sizing, Drop-In Installation — Sized to M6 metric standard, this washer seats directly onto the mating fastener without machining, trimming, or modification to the joint.
- Broad Boom and Telehandler Coverage — Fits Genie SX super-boom telescopic lifts, S series telescopic booms, Z and ZX series articulating booms, and GTH series telehandlers, making it a practical stock item for mixed Genie fleets.
- Maintains Clamp Load Integrity — A functioning lock washer prevents fastener back-off caused by vibration and dynamic load cycles. A missing or degraded washer can allow critical joints to loosen progressively during machine operation.
- Fastener Joint Safety on Aerial Equipment — On boom lifts and telehandlers, structural and hydraulic fastener joints are load-bearing. Replacing worn or missing hardware with a correct OEM-spec washer supports the mechanical integrity of those connections.
A lock washer is a thin, hardened ring placed beneath a bolt or nut to resist loosening under vibration, shock loads, and repeated motion cycles — conditions that aerial boom lifts and telehandlers encounter constantly during travel, positioning, and lift operations. The ZAB (zinc-alloy-baked) finish on this washer provides a corrosion-resistant barrier suited to outdoor and variable-weather environments. When a lock washer is absent, damaged, or substituted with an incorrect size, the fastener it supports can lose preload over time, leading to joint movement, wear of mating surfaces, or — in structural and hydraulic applications — potential failure of the connection.
Part Details
| Part Number | 1256457GT |
|---|---|
| Brand | Genie |
| Part Type | Genuine OEM |
| Description | Lock Washer, M6, ZAB |
Compatibility & Fitment
| Name | Model |
|---|---|
| SX-105 XC | SX-105 XC |
| SX-125 XC | SX-125 XC |
| S-60 FE Hybrid | S-60 FE Hybrid |
| S-60 DC | S-60 DC |
| S-80 XC | S-80 XC |
| S-85 XC | S-85 XC |
| S-80 HF | S-80 HF |
| S-85 HF | S-85 HF |
| S-60 FE | S-60 FE |
| GTH-636 | GTH-636 |
| GTH-1056 | GTH-1056 |
| GTH-844 | GTH-844 |
| Z-51/30J | Z-51/30J |
| Z-45/25 | Z-45/25 |
| Z-45/25J IC Power | Z-45/25J IC Power |
| ZX-135/70 | ZX-135/70 |
| Z-80/60 | Z-80/60 |
| Z-60/37 DC | Z-60/37 DC |
| Z-60/37 FE Hybrid | Z-60/37 FE Hybrid |
| Z-45/25 IC | Z-45/25 IC |
| Z-45 XC | Z-45 XC |
| Z-60 DC | Z-60 DC |
| Z-60 FE Hybrid | Z-60 FE Hybrid |
| Z-60 FE | Z-60 FE |
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.
