The Multiquip 4538 is a genuine OEM HHC Screw 1/4-20 x 2-1/2 GR 5 designed for a wide range of Multiquip and Whiteman concrete finishing and compaction equipment, including WRSPUDF, WRS5200, STXD6i, HTXD6i, CA4HM, JWN, J-Series, JA-Series, JS36H55, JS36H90H, JS36LE, and EPOXY-Series machines. As a direct OEM component sourced from Multiquip, part 4538 meets the exact material grade and thread specification required for correct installation. Grade 5 fasteners deliver the tensile strength needed for structural and mechanical connections on professional-grade concrete finishing equipment. Confirm your model code against the fitment list above before ordering to ensure an accurate match.
Key Features
- Grade 5 Tensile Strength — Heat-treated GR 5 construction provides the clamping force and shear resistance required for secure mechanical connections on ride-on and walk-behind finishing equipment.
- Correct Thread Form for Direct Installation — 1/4-20 UNC thread and 2-1/2 inch length match the OEM-specified fastener profile, threading directly into existing hardware without reworking holes or mating components.
- Wide Fitment Across Multiquip Finishing Lines — Compatible with WRSPUDF, WRS5200, STXD6i, HTXD6i, CA4HM, JWN, J-Series, JA-Series, JS36H55, JS36H90H, JS36LE, and EPOXY-Series units.
- Genuine OEM Part — Manufactured to Multiquip's original specification, ensuring the correct hex head dimensions, thread pitch, and material grade are present — details that matter when torque values and joint integrity are critical.
- Prevents Joint Failure and Component Movement — A worn, stripped, or incorrect-grade fastener in this application can allow panels, guards, or mechanical assemblies to shift under vibration, leading to accelerated wear on surrounding components.
A hex head cap screw is a structural fastener used to clamp two or more components together under a specified torque load. In concrete finishing and screed equipment, fasteners like the Multiquip 4538 secure housings, guards, drive components, and frame assemblies that must remain rigid during high-vibration operation. Grade 5 designation indicates the bolt has been medium-carbon steel heat treated to meet defined proof load and tensile strength thresholds — making it a step above standard hardware-store fasteners in applications where joint loosening or fastener fatigue can compromise machine performance. When a fastener of the wrong grade or thread specification is used, the joint may not hold the required torque, leading to movement, vibration damage, or premature failure of the parts it was meant to secure.
Part Details
| Part Number | 4538 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | HHC Screw 1/4-20 x 2-1/2 GR 5 |
Compatibility & Fitment
| Name | Model |
|---|---|
| Ride-On Roller Screeds | WRSPUDF |
| Whiteman Ride-On Power Trowels | STXD6i |
| Whiteman Ride-On Power Trowels | HTXD6i |
| Ride-On Roller Screeds | WRS5200 |
| Whiteman Walk-Behind Power Trowels | CA4HM |
| Mechanical Ride-On Trowels | JWN |
| Walk-Behind Trowels | EPOXY-SERIES |
| Walk-Behind Trowels | J-SERIES |
| Walk-Behind Trowels | JA-SERIES |
| Walk-Behind Trowels | JS36H55 |
| Walk-Behind Trowels | JS36H90H |
| Walk-Behind Trowels | JS36LE |
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.
