The Genie 76390GT is a genuine OEM Flat Washer, M16 Hardened designed for the Z-135/70 and ZX-135/70 articulating boom lifts. As a direct Genie OEM part, this washer is manufactured to the exact material and dimensional standards required for these machines, ensuring a proper fit at every fastener point it serves. Cross-reference part number 76390GT against your Genie parts manual to confirm the correct application before ordering. Whether you are completing a scheduled service or a structural repair, this hardened flat washer delivers the correct load distribution and surface protection your fastener assembly demands.
Key Features
- Hardened Steel Construction — The M16 hardening specification provides the increased surface hardness needed to resist deformation under high clamping loads, keeping fastener assemblies secure in heavy-duty boom lift applications.
- Genuine OEM Part — Sourced directly from Genie, this washer meets the exact material grade and dimensional tolerances specified for the Z-135/70 and ZX-135/70 — no guesswork on fitment or material compliance.
- Direct-Fit Replacement — Engineered to drop into the same fastener positions as the original, this washer installs without modification alongside standard M16 hardware already on the machine.
- Correct Load Distribution — A properly sized hardened washer spreads clamping force evenly across the mating surface, protecting structural components and preventing fastener pull-through over time.
- Structural Integrity on High-Reach Booms — On large articulating booms like the Z-135/70 and ZX-135/70, fastener hardware at boom joints and structural connection points is subject to significant dynamic loads — using the correct hardened washer is essential to maintaining the integrity of those assemblies.
A flat washer serves as a load-spreading interface between a fastener — such as a bolt head or nut — and the surface it clamps against. By distributing the clamping force over a larger area, it prevents the fastener from biting into or deforming the mating surface, which is especially important on structural joints that experience vibration and cyclic stress. The hardened specification of this washer means it resists being compressed or indented under the high clamping torques used on heavy-equipment structural fasteners. When a washer is missing, undersized, or worn flat, fastener preload can drop, joints can loosen prematurely, and the structural surfaces they protect can sustain damage — making prompt replacement with the correct OEM part the right call.
Part Details
| Part Number | 76390GT |
|---|---|
| Brand | Genie |
| Part Type | Genuine OEM |
| Description | Flat Washer, M16 Hardened |
Compatibility & Fitment
| Name | Model |
|---|---|
| Z-135/70 | Z-135/70 |
| ZX-135/70 | ZX-135/70 |
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.
