The Multiquip EM503112 is a genuine OEM HHC Screw 3/8"-16 x 2-3/4" designed for a wide range of Multiquip and Whiteman equipment including the RW1404, RW1504HF, WBH-16, WBH-21, and LS Series concrete pumps. As a factory-original fastener, EM503112 delivers the correct thread pitch, grip length, and head geometry to meet the assembly specifications of these machines. This screw is confirmed for use across RAMMAX rollers, Whiteman hydraulic power buggies, and Mayco LS Series concrete pumps, making it a high-utility OEM hardware component for contractors running mixed fleets. Order with confidence knowing this is a direct Multiquip OEM part supplied by DHS Equipment.
Key Features
- Genuine OEM Thread Specification — Factory-correct 3/8"-16 UNC thread form and 2-3/4" grip length ensure proper clamp load and torque retention in structural and mechanical assemblies.
- Hex Head Cap Design — The hex head cap (HHC) profile allows standard wrench and socket access for straightforward installation and removal in tight equipment bays.
- Broad Cross-Machine Fitment — Confirmed for RW1404, RW1404MR, RW1504HF, WBH-16, WBH-16E, WBH-16EAW, WBH-21E, and LS400/LS500/LS600 Series machines.
- Structural Integrity Assurance — Using the correct OEM fastener prevents joint movement, vibration loosening, and component misalignment that incorrect substitutes can cause under working loads.
- High-Utility Hardware SKU — A single part number that spans rollers, power buggies, and concrete pumps means one order covers multiple machines on the same jobsite.
A hex head cap screw is a threaded fastener used to clamp and secure structural components, panels, housings, and mechanical assemblies together. The thread specification — in this case 3/8"-16 UNC — defines how tightly and securely the fastener engages its mating nut or tapped hole, while the 2-3/4" length determines how much material the fastener can pass through or engage. Using a fastener with the wrong thread pitch, length, or head type can result in incomplete thread engagement, under-clamping, or joint failure under vibration and load — all common failure modes on compaction, pumping, and material-handling equipment. Replacing worn or damaged hardware with the correct OEM part number keeps assemblies torqued to specification and components properly aligned.
Part Details
| Part Number | EM503112 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | HHC Screw 3/8"-16 x 2-3/4" |
Compatibility & Fitment
| Name | Model |
|---|---|
| Rollers | RW1404MR |
| Rollers | RW1404 |
| Rollers | RW1504HF up to S/N 1534188 |
| Rollers | RW1404MR S/N 326075 and up |
| Power Buggies | WBH-16EAWDF |
| Power Buggies | WBH-16EAWD |
| Power Buggies | WBH-21EF |
| Power Buggies | WBH-16F |
| Power Buggies | WBH-16EF |
| Power Buggies | WBH-16E |
| Power Buggies | WBH-16 |
| Power Buggies | WBH-21EFP |
| Power Buggies | WBH21EPA |
| Mayco Pumps | LS600P |
| Mayco Pumps | LS600 |
| Mayco Pumps | LS50TD |
| Mayco Pumps | LS40TD |
| Mayco Pumps | LS500 |
| Mayco Pumps | LS400 |
| Mayco Pumps | LS40D |
| Mayco Pumps | LS60TD |
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.
