The Genie 21604GT Hex Head Cap Screw, 3/8-16 x 3.25 is a genuine OEM fastener built for a wide range of Genie aerial lifts and telehandlers, including GS rough-terrain scissor lifts, S and SX telescopic boom lifts, Z and ZX articulating boom lifts, GTH telehandlers, and TZ trailer-mounted booms. As a direct OEM replacement, this screw is manufactured to the same dimensional and material standards as the original hardware installed at the factory. Cross-reference part number 21604GT against your machine's parts manual to confirm it is the correct fastener for your application before ordering.
Key Features
- Genuine OEM Dimensional Conformity — Machined to exact 3/8-16 thread pitch and 3.25-inch length specifications, ensuring correct thread engagement and clamp load for the joint it secures.
- Direct OEM Replacement — Installs in place of the original fastener with no rework or modification to the mating hardware.
- Broad Genie Fitment — Fits multiple Genie equipment families including GS scissor lifts, S and SX telescopic booms, Z and ZX articulating booms, GTH telehandlers, TZ trailer booms, and IWP Super Series personnel lifts.
- Structural Integrity — A correctly torqued, properly sized fastener maintains the clamped joint at design load; a worn, stretched, or incorrect screw can allow joint movement and accelerated component wear.
- Sourced from Genie — Supplied as a genuine Genie part through DHS Equipment, giving you the assurance of the correct grade, thread form, and head configuration for the application.
A hex head cap screw is a threaded fastener used to clamp two or more components together, with the hexagonal head providing a bearing surface for a wrench or socket during installation and torquing. The thread size and length determine how much of the fastener engages the mating thread and how much clamping force the joint develops — using a screw that is too short reduces thread engagement and weakens the joint, while one that is too long may bottom out before the joint is fully clamped. Replacing a damaged or missing screw with the correct OEM part restores the joint to its designed clamping specification.
Part Details
| Part Number | 21604GT |
|---|---|
| Brand | Genie |
| Part Type | Genuine OEM |
| Description | Hex Head Cap Screw, 3/8-16 x 3.25 |
Compatibility & Fitment
| Name | Models |
|---|---|
| GS-2668 DC | GS-2668 DC |
| GS-2668 RT | GS-2668 RT |
| GS-3268 DC | GS-3268 DC |
| GS-3268 RT | GS-3268 RT |
| GTH-644 | GTH-644 |
| GTH-842 | GTH-842 |
| GTH-844 | GTH-844 |
| GTH-1048 | GTH-1048 |
| GTH-1056 | GTH-1056 |
| IWP Super Series | IWP Super Series |
| S-45 | S-45 |
| S-60 | S-60 |
| S-65 | S-65 |
| S-100 | S-100 |
| S-100HD | S-100HD |
| S-105 | S-105 |
| S-120 | S-120 |
| S-120HD | S-120HD |
| S-125 | S-125 |
| SX-150 | SX-150 |
| SX-180 | SX-180 |
| TZ-50 | TZ-50 |
| Z-33 DC Power | Z-33 DC Power |
| Z-34 IC | Z-34 IC |
| Z-34/22 Bi-Energy | Z-34/22 Bi-Energy |
| Z-45/22 | Z-45/22 |
| Z-45/22 MP | Z-45/22 MP |
| Z-45/25 | Z-45/25 |
| Z-45/25 IC | Z-45/25 IC |
| Z-45/25J Bi-Energy | Z-45/25J Bi-Energy |
| Z-45/25J DC | Z-45/25J DC |
| Z-45/25J IC | Z-45/25J IC |
| Z-45/25J IC Power | Z-45/25J IC Power |
| Z-51/30J | Z-51/30J |
| Z-60/34 | Z-60/34 |
| Z-80/60 | Z-80/60 |
| Z-135/70 | Z-135/70 |
| Z33/18 | Z33/18 |
| 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.
