Husqvarna 542020376 Hex Head Cap Screw .3125-18 X 4.5 Grade 5 Zinc Plated

The Husqvarna 542020376 Hex Head Cap Screw.3125-18 X 4.5 Grade 5 Zinc Plated is a genuine OEM fastener designed for the MS610G masonry saw. This screw is manufactured to Husqvarna's exact thread pitch, grip length, and grade specifications, ensuring a secure, correctly torqued connection in the assembly it serves. Cross-reference part number 542020376 against your MS610G parts diagram to confirm placement before ordering. DHS Equipment supplies this part to help keep your equipment running at full capacity.

Key Features

• Grade 5 Zinc-Plated Construction — Heat-treated to Grade 5 strength with a zinc-plated finish that resists corrosion in wet cutting and slurry environments typical of masonry saw operation.
• Correct Thread Specification — Cut to a 5/16-18 UNC thread profile at 4.5 inches of grip length, matching the precise fastener spec called out in the MS610G assembly diagram.
• Genuine OEM Hardware — Sourced directly from Husqvarna, this cap screw meets the same dimensional and tensile standards as the original fastener installed at the factory.
• Secure Assembly Integrity — A correctly specified cap screw maintains proper clamping force on critical joints; an undersized or incorrect-grade substitute risks joint loosening under the vibration loads generated during masonry cutting.
• Direct MS610G Fitment — Engineered specifically for the MS610G masonry saw, eliminating guesswork when sourcing replacement hardware for this machine.

A hex head cap screw like this one is a structural fastener used to clamp and secure components within a machine assembly. The grade rating defines the tensile and yield strength of the bolt, while the zinc plating protects the threads and bearing surface from rust and corrosion. When a cap screw in a high-vibration assembly such as a masonry saw stretches, corrodes, or is replaced with an incorrect grade, joint integrity is compromised — leading to loosening, component movement, or fastener failure during operation. Using the correct OEM specification screw restores the designed clamping load and keeps the assembly secure.

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.