The Multiquip 1121 is a genuine OEM HHCS Screw 3/8-16 x 2-3/4 designed for a wide range of Multiquip and Whiteman equipment including walk-behind and ride-on power trowels, ride-on roller screeds, and flat saws. As a direct OEM replacement, part 1121 meets the exact thread specification and dimensional standard called out in the original equipment build, ensuring correct clamp load and fitment in every application. Verified compatible with the J36E2, STXD6i, HDA Series, WRSPUDF, WRS5200, WRS5200DFPU, SP1E16A, and SP2S20H, this fastener keeps critical assemblies properly secured across multiple machine families. Keep a supply on hand to support routine maintenance and field repairs across your Multiquip fleet.
Key Features
- OEM-Grade Fastener Integrity — Manufactured to the original thread class and hardness grade for the 3/8-16 x 2-3/4 specification, delivering consistent clamp force without stripping or loosening under vibration.
- Drop-In Thread Compatibility — The 3/8-16 UNC thread form drops directly into existing tapped holes and mating hardware without rework or retapping.
- Broad Cross-Family Fitment — A single part number covers walk-behind trowels (J36E2, HDA Series), the STXD6i ride-on trowel, WRS roller screeds, and SP Series flat saws, simplifying parts inventory across your fleet.
- Vibration-Critical Application Suitability — Trowels, screeds, and saws operate under sustained vibration loads; using the correct OEM fastener grade prevents fastener fatigue and joint loosening over time.
- Structural Connection Reliability — Worn or incorrect fasteners in trowel blade guards, screed frames, and saw assemblies can compromise structural integrity; replacing with the correct 1121 restores the designed clamping capacity.
A hex head cap screw (HHCS) is a standard structural fastener used throughout heavy equipment assemblies to bolt components together under controlled torque. The 3/8-16 x 2-3/4 sizing refers to the thread diameter, thread pitch, and grip length respectively — all three must match the application exactly to achieve the specified clamp load. When a fastener of the wrong grade, length, or thread pitch is substituted, it can result in joint movement, accelerated wear on mating components, or complete fastener failure during operation.
Part Details
| Part Number | 1121 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | HHCS Screw 3/8-16 x 2-3/4 |
Compatibility & Fitment
| Name | Model |
|---|---|
| Whiteman Walk-Behind Power Trowels | J36E2 |
| Whiteman Ride-On Power Trowels | STXD6i |
| Whiteman Walk-Behind Power Trowels | HDA-SERIES |
| Ride-On Roller Screeds | WRSPUDF |
| Ride-On Roller Screeds | WRS5200 |
| Ride-On Roller Screeds | WRS5200DFPU |
| Saws | SP1E16A |
| Saws | SP2S20H |
| International Walk-Behind Power Trowels | J SERIES CHINA |
| International Walk-Behind Power Trowels | B SERIES CHINA |
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.
