The Multiquip 21031 is a genuine OEM HHC Rounded Screw 7/16-14 designed for MD and STX/HTX series ride-on power trowels. This fastener is sourced directly from Multiquip and built to the exact specifications used in original production, ensuring a proper fit across compatible machines including the MD105, MD80, STX55Y6, HTXD6i, STXD6i, STX55J6, STXDF, STX6H, HTX6H, and HTXG6DF. When a fastener fails or goes missing on a ride-on trowel, using the correctly rated OEM replacement keeps critical assemblies secured and the machine operating as intended. DHS Equipment stocks the Multiquip 21031 as an authorized distributor of genuine Multiquip parts.
Key Features
- Genuine OEM Grade Fastener — Manufactured to Multiquip's original thread class and head geometry specifications for the 7/16-14 thread form, so torque values and clamping load remain consistent with the original build.
- Drop-In Replacement — Matches the original hex head cap rounded profile exactly, threading directly into existing tapped holes without reworking the mating surface.
- Broad Ride-On Trowel Coverage — Compatible with MD105, MD80, STX55Y6, HTXD6i, STXD6i, STX55J6, STXDF, STX6H, HTX6H, and HTXG6DF ride-on power trowels.
- Structural Integrity Under Vibration — A correctly spec'd fastener maintains assembly clamp load during the sustained vibration and load cycles typical of finishing trowel operation; an incorrect or undersized screw can back out or shear under those same conditions.
- Authorized Multiquip Part — Sold by DHS Equipment as an authorized Multiquip distributor, so the part number, grade, and configuration are verified against current Multiquip parts documentation.
A hex head cap screw like the Multiquip 21031 is a structural fastener that clamps two or more components together by converting applied torque into clamping force at the joint. On a ride-on power trowel, fasteners of this type are used throughout the frame, gearbox, and blade assembly structures where consistent preload is critical to safe machine operation. When a screw of this specification is missing, cross-threaded, or substituted with an incorrect grade, the affected joint can loosen progressively under vibration, leading to component misalignment, accelerated wear on mating parts, or outright mechanical failure during use.
Part Details
| Part Number | 21031 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | HHC Rounded Screw 7/16-14 |
Compatibility & Fitment
| Name | Model |
|---|---|
| Hydraulic Ride-On Power Trowels | MD105 |
| Hydraulic Ride-On Power Trowels | MD80 |
| Whiteman Ride-On Power Trowels | STX55Y6 |
| Whiteman Ride-On Power Trowels | HTXD6i |
| Whiteman Ride-On Power Trowels | STXD6i |
| Whiteman Ride-On Power Trowels | STX55J6 |
| Whiteman Ride-On Power Trowels | STXDF |
| Whiteman Ride-On Power Trowels | STX6H |
| Whiteman Ride-On Power Trowels | HTX6H |
| Whiteman Ride-On Power Trowels | HTXG6DF |
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.
