The Genie 81777GT is a genuine OEM Hex Head Cap Screw, 3/8-16 x 7, built for a broad range of Genie telescopic boom lifts, articulating boom lifts, and scissor lifts. As a factory-sourced fastener, this screw matches the exact thread pitch, grip length, and head dimensions specified for each application it serves. Cross-reference part number 81777GT against your machine's parts manual to confirm it is the correct fastener for your specific assembly point. It fits models including the S-60 XC, S-85, GS-5390, Z-135/70, and ZX-135/70, among others.
Key Features
- Genuine OEM Dimensions — Manufactured to Genie's exact 3/8-16 thread and 7-inch length specification, ensuring the fastener seats and torques correctly in the intended joint.
- Direct Drop-In Replacement — Replaces the original screw without reworking the mating hardware, keeping your repair straightforward and your machine back in service quickly.
- Wide Equipment Compatibility — Fits Genie S-series telescopic booms, Z-series articulating booms, and GS large-platform scissor lifts, making it a practical fastener to keep in stock for mixed Genie fleets.
- Structural Integrity You Can Count On — A fastener at the correct grade and length maintains the clamping load the joint was engineered for; an undersized or incorrect screw can allow movement, wear, or loosening over time.
- Aerial-Lift Safety Relevance — On elevated work platforms, fastener integrity is a genuine safety consideration. Using the correct OEM-spec screw helps ensure structural connections remain within the load and torque limits the machine was designed around.
A hex head cap screw is a fully threaded or partially threaded fastener with a six-sided head designed to be driven by a wrench or socket. On Genie boom lifts and scissor lifts, cap screws like this one secure structural brackets, pivot assemblies, covers, and other critical joints throughout the machine. When a screw is missing, stripped, or substituted with an incorrect length or thread pitch, the joint it holds can shift or fail to maintain proper clamping force — leading to component movement, accelerated wear, or a connection that no longer meets the machine's structural requirements. Replacing a worn or damaged fastener with the correct OEM part, verified by cross-referencing 81777GT in your parts manual, is the straightforward way to restore the joint to its intended condition.
Part Details
| Part Number | 81777GT |
|---|---|
| Brand | Genie |
| Part Type | Genuine OEM |
| Description | Hex Head Cap Screw, 3/8-16 x 7 |
Compatibility & Fitment
| Name | Model |
|---|---|
| S-80X | S-80X |
| S-80 | S-80 |
| S-85 | S-85 |
| S-60 | S-60 |
| S-65 | S-65 |
| S-60X | S-60X |
| S-60 XC | S-60 XC |
| S-60 HC | S-60 HC |
| S-60 TRAX | S-60 TRAX |
| S-65 TRAX | S-65 TRAX |
| GS-3390 | GS-3390 |
| GS-4390 | GS-4390 |
| GS-5390 | GS-5390 |
| GS-3384 | GS-3384 |
| Z-135/70 | Z-135/70 |
| Z-80/60 | Z-80/60 |
| 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.
