Midwest Fasteners Grade 5 Zinc Plated Steel Fine Thread Hex Cap Screw

Midwest Fasteners Grade 5 Zinc Plated Steel Fine Thread Hex Cap Screw

The Midwest Fasteners Grade 5 Zinc Plated Steel Fine Thread Hex Cap Screw family covers fine thread hex bolts in sizes from 1/4"-28 up to 1/2"-20, with lengths ranging from 3/4" up to 4", giving contractors, fabricators, and maintenance techs a single source for a full fine-thread hex cap screw lineup. Every size in the family is manufactured from Grade 5 steel and finished with zinc plating for improved corrosion resistance over bare steel, and each screw carries a hex head and hex drive that accepts a standard wrench or socket for fast, high-torque installation and equally fast removal during maintenance work. The fine thread pattern used throughout this family delivers tighter thread engagement than a coarse thread alternative of the same diameter, helping the fastener resist loosening under vibration in equipment, machinery, and structural assemblies. Whether the job calls for a short 3/4" cap screw in a compact assembly or a longer 4" screw in a thicker stack-up, this Grade 5 zinc plated hex cap screw family keeps the same material, grade, and finish from one end of the size range to the other.

Key Features

• Size Range: Fine thread sizes from 1/4"-28 through 1/2"-20, with lengths available from 3/4" up to 4" across the family.
• Connection Type: Hex head and hex drive design for use with standard wrenches and sockets, supporting fast, high-torque installation.
• Material & Finish: Steel construction with a zinc plated finish that improves corrosion resistance compared to unplated steel.
• Grade: Grade 5 steel construction for dependable mechanical performance in general-purpose and structural fastening applications.
• Thread: Fine thread pitch throughout the family for tighter thread engagement and improved resistance to vibration loosening versus coarse thread.
• Head Style: Hex cap screw head permits high installation torque with a wrench or socket and fast removal for maintenance work.

Technical Specifications

• Connection Type: Hex
• Grade: 5
• Product Material: Steel
• Product Finish: Zinc
• Thread Pitch: Fine
• Country of Origin: China
• Product Size: 1/4" - 1/2"

Typical Applications

• General machinery assembly and equipment repair where a Grade 5 hex cap screw is specified.
• Structural and mechanical connections that call for a fine thread pitch for tighter engagement.
• Maintenance and replacement fastening on equipment originally assembled with hex cap screws.
• Fabrication and shop assembly work calling for a zinc plated steel hex bolt across a range of sizes.
• Projects that require multiple fine-thread hex cap screw lengths or diameters from a single consistent source.

Why Midwest Fasteners?

Midwest Fasteners supplies this Grade 5 hex cap screw family in consistent steel material and zinc plated finish across its full fine-thread size range, from 1/4"-28 up to 1/2"-20 with lengths of 3/4" up to 4", giving contractors, fabricators, and maintenance techs a fastener they can specify with confidence across repeat jobs regardless of which size the project calls for. The fine thread pitch and hex head combination is manufactured to a consistent standard, so every unit in the family installs the same way with the same wrench or socket, size after size.