Multiquip 1284 HHCS Screw 3/8-16 x 1

The Multiquip 1284 is a genuine OEM HHCS Screw 3/8-16 x 1 used across a broad range of Multiquip, Whiteman, Essick, and STOW equipment. This fastener is verified against OEM build specifications and is a direct replacement for the original hardware on compatible machines. Confirmed fitment spans walk-behind and ride-on trowels, flat saws and pavement saws, masonry saws, concrete saws, mortar and concrete mixers, screeds, light towers, generators, welders, and core drills — covering model families including JWN, SP2, WRS5200, HTN, CA4, EM120, WM120, MS, MP, LT12, and many others.

Key Features

• Genuine OEM Hardware Grade — Manufactured to the thread pitch, tensile strength, and dimensional tolerances specified by Multiquip for this fastener position, ensuring secure clamping force wherever it is installed.
• Hex Head Cap Screw Configuration — The standard hex head cap screw profile installs with common hand and power tools and seats flush against mating surfaces without spacers or modifications.
• Broad Cross-Family Fitment — A single verified part number covering trowels (JWN, CA4, HTN, JTN), flat and pavement saws (SP2, SP1, CS8, CC8), screeds (WRS5200, WSHE-A), mixers (EM120, WM120), light towers (LT12), and more.
• Correct Thread Specification — The 3/8-16 UNC thread form matches the tapped holes used in Multiquip structural and panel assemblies, preventing cross-threading, joint loosening, or fastener failure under vibration.
• Maintains Structural Integrity Under Load — Replacing a damaged or missing fastener with the correct OEM spec screw restores the clamping load the joint was engineered for, which is especially critical on vibrating or rotating equipment.

A hex head cap screw — commonly referred to as an HHCS — is a standard threaded fastener used to clamp components together in a structural or mechanical joint. On equipment that operates under sustained vibration, such as concrete trowels, compaction machines, and pavement saws, fasteners are subjected to cyclic loading that can gradually loosen or fatigue an incorrect or worn screw. Using the correct OEM-specified fastener with the right thread form, length, and tensile grade ensures the joint maintains its designed clamping force throughout the service interval. A missing or substitute fastener of the wrong grade can allow panels, guards, or mechanical assemblies to shift, which may compromise both equipment performance and operator safety.

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.

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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.