Multiquip 20476 HHC Screw 1/4-28 x 3/8

The Multiquip 20476 is a genuine OEM HHC Screw 1/4-28 x 3/8 designed for a wide range of Multiquip and Whiteman ride-on and walk-behind power trowel models. As a direct OEM replacement, it meets the exact specifications set at the time of manufacture, ensuring a consistent, secure fit across compatible trowel assemblies. This screw is confirmed for use on models including EHHNK5, HHNG5, HHXD5, B46, JS36H55, CA4HM, JH55C, and many others in the Multiquip power trowel lineup. Sourcing part number 20476 directly ensures you are installing the correct fastener for the application — critical on concrete finishing equipment where hardware integrity directly affects machine operation and safety.

Key Features

• Genuine OEM Fastener Grade — Manufactured to the exact thread specification (1/4-28 UNF) and length (3/8 in.) required for correct clamping load and torque retention in trowel assemblies.
• Drop-In Hardware Replacement — Threaded dimensions match the original installation points on compatible trowel frames and components, requiring no rethreading or modification of existing hardware seats.
• Broad Trowel Compatibility — Fits a wide range of Multiquip and Whiteman power trowels including EHHNK5, HHNG5, HHXD5, HHXG5, B46, B46S90, JS36H55, JS36H90, JH55C, JH90C, CA4HM, CA4HC/CA5BC, J3036H55, and additional models in both the ride-on and walk-behind families.
• Structural Integrity on the Finishing Floor — A correctly specified fastener maintains tight, vibration-resistant connections in a high-cycle power trowel environment, preventing loosening during operation that could affect blade pitch or guard retention.
• Hardware Safety Relevance — On power trowels, fastener failure at key connection points can lead to component shift or guard displacement during operation; using the OEM-specified screw maintains the mechanical integrity of the assembly.

The HHC Screw 1/4-28 x 3/8 is a hex head cap screw used to secure components within the power trowel assembly. The fine thread (1/4-28 UNF) provides greater thread engagement and superior resistance to loosening under vibration compared to coarse-thread fasteners — a key requirement on concrete finishing machines that generate continuous rotational and mechanical vibration during use. When this screw loosens, strips, or is replaced with an incorrect substitute, it can compromise the integrity of the connected component, leading to misalignment, premature wear on adjacent parts, or unsafe operating conditions.

Part Details

Compatibility & Fitment

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.