The Genie 1278686GT Socket Head Cap Screw, 3/8-16X5 is a genuine OEM fastener built for Genie S-40 and S-45 telescopic boom lifts, including XC, TRAX, and HF variants. As a direct OEM replacement, this screw is manufactured to the same A574 alloy steel specification and ZAG finish as the original, so it installs without modification into the machine's existing fastener location. Confirmed fitment covers the S-40 XC, S-45 XC, S-40 TRAX, S-45 TRAX, S-40 HF, and S-45 HF — always cross-reference part number 1278686GT against your machine's parts manual to verify it is the correct item for your unit.
Key Features
- A574 Alloy Steel Construction — Manufactured to A574 high-strength alloy steel spec with a ZAG corrosion-resistant finish, meeting the same material grade as the original fastener.
- Direct OEM Replacement — Matches the original 3/8-16 thread pitch and 5-inch length exactly, so the screw seats correctly without reworking threads or mating hardware.
- Confirmed Fitment for S-40 and S-45 Variants — Compatible with the S-40 XC, S-45 XC, S-40 TRAX, S-45 TRAX, S-40 HF, and S-45 HF telescopic boom lifts.
- Correct Torque Integrity — A properly rated fastener maintains the clamping load the joint was designed for; an underspec or worn screw can allow movement, loosening, or structural compromise at the connection point.
- Genuine Genie OEM Part — Sourced directly through the Genie OEM supply chain, ensuring the part number, specification, and finish match what was installed at the factory.
A socket head cap screw is a high-strength threaded fastener driven by a hex key (Allen wrench) through a cylindrical recessed head. On telescopic boom lifts, fasteners like this one are used in structural, mechanical, and platform connections where a flush or recessed head profile is required and high clamping strength is essential. When a screw of this type stretches, strips, or corrodes, the joint it holds can loosen — leading to play in the connection, accelerated wear on mating components, or a failed fastener that takes the joint out of service entirely. Replacing a worn or damaged screw with the correct OEM-spec part restores the joint to its original clamping specification and keeps the assembly secure.
Part Details
| Part Number | 1278686GT |
|---|---|
| Brand | Genie |
| Part Type | Genuine OEM |
| Description | Socket Head Cap Screw, 3/8-16X5, A574, ZAG |
Compatibility & Fitment
| Name | Model |
|---|---|
| S-40 XC | S-40 XC |
| S-45 XC | S-45 XC |
| S-40 TRAX | S-40 TRAX |
| S-45 TRAX | S-45 TRAX |
| S-40 HF | S-40 HF |
| S-45 HF | S-45 HF |
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.
