Multiquip 21017 HHC Screw 3/8-16 x 3-1/4 Full Thread Grade 5

The Multiquip 21017 HHC Screw 3/8-16 x 3-1/4 Full Thread Grade 5 is a genuine OEM fastener designed for Whiteman walk-behind power trowels and Multiquip flat saw models including CA4HC, J3036H55, BS90C, BH11C, BH90C, JS60C, JH90C, JH55C, B46, CA4HM, B46S90, CS24H55E, BS46H11, BS46H90, JS36H90, JS36H55, CA-4-4H, SP1E16A, and SP1CE13H18. As a direct Multiquip OEM part, the 21017 is manufactured to the exact dimensions and grade specification of the original hardware used in production. Sourcing the correct fastener by part number ensures proper thread engagement, correct clamp load, and a fit that matches the original assembly without rework. DHS Equipment stocks genuine Multiquip replacement parts so you can get the right component the first time.

Key Features

• Grade 5 Tensile Strength — Manufactured to SAE Grade 5 specification, delivering the clamping force and shear resistance required for structural fastener locations on power trowels and saws.
• Full-Thread Profile — 3/8-16 full-thread configuration provides consistent thread engagement across the full bolt length, making this screw suitable for through-bolted and deep-threaded applications.
• Genuine OEM Multiquip Part — Sourced directly from Multiquip, this fastener matches the original hardware specification — correct diameter, thread pitch, length, and head style — for a true drop-in replacement.
• Wide Trowel and Saw Fitment — Confirmed for Whiteman and International walk-behind power trowel families (CA, J, B, BS, JS, JH, BH series) as well as SP-series flat saws, covering a broad range of Multiquip equipment.
• Critical Assembly Integrity — Using the correct fastener grade and length prevents fastener fatigue, loosening under vibration, and joint failure that can compromise guard, blade, or structural panel retention during operation.

A hex head cap screw is a structural fastener used to clamp machine components together at a defined torque, maintaining joint integrity under the continuous vibration and load cycles that power trowels and saws produce. The 3/8-16 thread designation specifies the nominal diameter and thread pitch, while the Grade 5 rating defines the minimum tensile and proof load the fastener can handle before yielding. When a fastener of the wrong grade, length, or thread pitch is substituted, the joint may not achieve proper clamp load, increasing the risk of loosening, wear at the bolt hole, or fastener failure during operation.

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.