The Genie 40021GT is a genuine OEM Flat Washer,.390 ID x.625 OD, designed for the Genie GRC-12 and CWP Super Series machines. Sourced directly from Genie, this washer meets the original engineering specifications for the fastener assemblies it supports — ensuring the same fit and function as the part that left the factory. Cross-reference part number 40021GT against your Genie parts manual to confirm this is the correct washer for your application before ordering.
Key Features
- Genuine OEM Dimensioning — Manufactured to the original .390 ID x .625 OD specification, matching the exact bearing surface and hole clearance of the factory-installed washer.
- Drop-In Hardware Replacement — Seats and stacks the same as the original, requiring no reworking of the fastener assembly or mating hardware.
- Confirmed Fitment — Compatible with the Genie GRC-12 vertical mast lift and CWP Super Series units; verify using part number 40021GT in your parts manual.
- Load Distribution Integrity — A correctly sized flat washer spreads clamping load evenly across the mating surface, protecting the joint from fastener pull-through and surface damage over time.
- Structural Joint Compliance — On aerial work equipment, maintaining proper fastener torque and load distribution is essential to structural integrity; using an off-spec washer can compromise joint clamping force and long-term assembly stability.
A flat washer serves a straightforward but important role in any bolted assembly: it distributes the clamping load of a nut or bolt head over a larger surface area, protecting the material beneath from damage and helping maintain consistent fastener tension. On equipment like the Genie GRC-12 and CWP Super Series, where structural fasteners hold together mast sections, platforms, and drive components, using a washer that matches the original inside and outside diameter is essential. When a washer is worn, deformed, or replaced with one of the wrong dimensions, fastener torque becomes inconsistent and the joint may loosen prematurely — leading to vibration, wear, and potential hardware failure in the assembly.
Part Details
| Part Number | 40021GT |
|---|---|
| Brand | Genie |
| Part Type | Genuine OEM |
| Description | Flat Washer, .390 ID x .625 OD |
Compatibility & Fitment
| Name | Model |
|---|---|
| GRC-12 | GRC-12 |
| CWP Super Series | CWP Super Series |
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.
