The Multiquip 11821 is a genuine OEM Screw SHC M8-1.25 x 25mm GR12.9 NP designed for Whiteman ride-on power trowel models HTX44K4, HTX44K5, STX55J6, and STX55Y6. As a factory-sourced fastener, this screw meets the exact grade and dimensional specifications required for critical assembly points on these hydrostatic trowels. Sourcing the correct hardware by part number 11821 ensures the joint holds to spec and does not introduce failure points from mismatched grades or thread pitches. DHS Equipment supplies this as a direct OEM replacement so you can complete your repair or rebuild with confidence.
Key Features
- Grade 12.9 High-Tensile Strength — Rated at the highest common metric fastener grade, this screw delivers the clamping force required for structural and mechanical assemblies on heavy ride-on trowel equipment.
- Exact Thread Specification — M8-1.25 thread pitch and 25mm length match the OEM-specified fastener exactly, allowing installation into existing threaded bores without retapping or modification.
- Socket Head Cap (SHC) Drive Style — The hex socket head allows precise torque application with a standard Allen/hex key, keeping fastener installation clean and controlled in tight assembly areas.
- Confirmed Fitment for HTX44 and STX55 Series — Verified for HTX44K4, HTX44K5, STX55J6, and STX55Y6 Whiteman ride-on power trowels, so you can order by part number 11821 without cross-referencing uncertainty.
- Genuine OEM Part — Sourced directly from Multiquip, this fastener carries the correct NP (non-plated) surface finish specified for these assemblies, maintaining material compatibility with mating components.
A socket head cap screw like the Multiquip 11821 is a precision fastener used to clamp and secure mechanical assemblies, covers, and structural components under defined torque loads. At Grade 12.9, it is engineered to handle high-stress joints where a lower-grade substitute could stretch, strip, or fail under load — potentially allowing critical components to shift or detach during operation. Using the correct OEM-specified screw by grade, thread pitch, and length is essential to maintaining the integrity of the assembly it secures.
Part Details
| Part Number | 11821 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Screw SHC M8-1.25 x 25mm GR12.9 NP |
Compatibility & Fitment
| Name | Model |
|---|---|
| Whiteman Ride-On Power Trowels | HTX44K4 |
| Whiteman Ride-On Power Trowels | HTX44K5 |
| Whiteman Ride-On Power Trowels | STX55J6 |
| Whiteman Ride-On Power Trowels | STX55Y6 |
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.
