The Genie 1257229GT is a genuine OEM Lock Washer, 5/8 ZAG designed for Genie Z-series articulating boom lifts. Sourced directly from Genie, this washer delivers the exact specification required for fastener assemblies across the Z-45 and Z-51 model families, including the Z-51/30J, Z-45/25, Z-45/25J DC, Z-45/25J Bi-Energy, Z-45/25J IC Power, Z-45 XC, and Z-45/25 IC. As a genuine OEM component, part number 1257229GT is the same part shipped with new machines, so you can be confident in the fit and specification before the order even ships. Cross-reference 1257229GT against your parts manual to confirm placement on your specific unit.
Key Features
- Genuine OEM Hardened Locking Surface — ZAG zinc-and-clear coating provides the corrosion resistance and surface hardness required to maintain consistent clamping load in structural fastener applications on aerial equipment.
- Drop-In Replacement — Matches the original 5/8 bore and profile exactly, seating correctly against mating fastener hardware without rework or shimming.
- Broad Z-Series Compatibility — Fits the Z-51/30J, Z-45/25, Z-45/25J DC, Z-45/25J Bi-Energy, Z-45/25J IC Power, Z-45 XC, and Z-45/25 IC articulating boom lifts in a single part number.
- Vibration Resistance Where It Counts — Lock washers in boom-lift fastener assemblies resist loosening caused by machine vibration and dynamic loading during travel and lifting cycles, protecting joint integrity over time.
- Structural Joint Safety — On articulating booms, fastener preload is a genuine safety consideration. Using the correct OEM-spec washer ensures joint clamping force is maintained as designed, supporting the structural integrity of boom and platform connections.
A lock washer's job is straightforward but critical: it maintains tension in a bolted joint by resisting rotation and vibration-induced loosening. On articulating boom lifts like the Z-45 and Z-51 series, structural and mechanical fasteners are subject to constant vibration, dynamic loads, and repeated movement cycles — conditions that can gradually back off an unsecured fastener over time. When a lock washer flattens, cracks, or is missing entirely, the fastener loses its preload, potentially allowing components to shift or work loose. Replacing worn or damaged washers with the correct OEM-spec part keeps fastener assemblies performing as the machine was engineered to operate.
Part Details
| Part Number | 1257229GT |
|---|---|
| Brand | Genie |
| Part Type | Genuine OEM |
| Description | Lock Washer, 5/8, ZAG |
Compatibility & Fitment
| Name | Model |
|---|---|
| Z-51/30J | Z-51/30J |
| Z-45/25 | Z-45/25 |
| Z-45/25J DC | Z-45/25J DC |
| Z-45/25J Bi-Energy | Z-45/25J Bi-Energy |
| Z-45/25J IC Power | Z-45/25J IC Power |
| Z-45 XC | Z-45 XC |
| Z-45/25 IC | Z-45/25 IC |
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.
