The Genie 121431GT Hex Head Flange Screw, M12X30 GR12.9 is a genuine OEM fastener built for Genie S-series telescopic boom lifts and SX and ZX super-boom and articulating boom lifts, including the S-80, S-80X, S-85, SX-135 XC, SX-150, SX-180, and ZX-135/70. Sourced directly from Genie, this screw matches the original equipment specification — thread pitch, shank dimensions, and Grade 12.9 hardness rating — so it installs without modification and holds with the same clamping force as the part it replaces. Cross-reference part number 121431GT against your machine's parts manual to confirm it is the correct fastener for your application before ordering.
Key Features
- Grade 12.9 Hardness — The highest common metric fastener strength class, delivering the clamping force and tensile strength the original design calls for — no substituting a lower-grade fastener.
- Exact OEM Dimensions — M12X30 thread and shank dimensions are held to original specification, ensuring correct engagement depth and proper seating against mating components.
- Integrated Flange Head — The flange distributes clamping load across a wider bearing surface, reducing the risk of fastener pull-through or surface damage on the joint.
- Broad Boom Lift Fitment — Fits Genie S-series telescopic booms and SX and ZX super-boom and articulating boom lifts, covering some of the largest machines in the Genie range.
- Genuine OEM Part — Supplied by Genie as original equipment, so this part meets the same material and dimensional standards as the screw that came off the production line.
A hex head flange screw combines a standard hex-drive head with a built-in washer flange, creating a wider load-bearing surface without a separate washer. At Grade 12.9, this fastener is engineered for high-stress joints where a standard-grade screw could stretch, loosen, or fail under load. When a fastener at a critical joint is worn, stripped, or replaced with an incorrect grade, joint integrity is compromised — which on large boom lifts can affect the security of structural and mechanical connections throughout the machine. Using the correct OEM-grade replacement keeps the joint performing as designed.
Part Details
| Part Number | 121431GT |
|---|---|
| Brand | Genie |
| Part Type | Genuine OEM |
| Description | Hex Head Flange Screw, M12X30 GR12.9 |
Compatibility & Fitment
| Name | Model |
|---|---|
| S-80X | S-80X |
| S-80 | S-80 |
| S-85 | S-85 |
| SX-150 | SX-150 |
| SX-180 | SX-180 |
| SX-135 XC | SX-135 XC |
| 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.
