Value Collection 99155 5/8-11 X 3-1/2 in Grade 8 Hex Cap Screw 25pk

Product Description

The VALUE COLLECTION 99155 is a partially threaded hex head cap screw intended for general mechanical and structural fastening applications. It is manufactured from Grade 8 steel with an uncoated finish, making it suited for high-strength bolted connections where surface coating is not required. The screw follows a 5/8-11 UNC thread pattern with a 3-1/2 inch length measured under the head, and it conforms to ASME B18.2.1 dimensional standards. This fastener is typically installed by millwrights, maintenance mechanics, ironworkers, and general contractors working on assemblies that demand a high-tensile fastener in the inch measurement system.

This hex head cap screw is used across a wide range of industrial, commercial, and mechanical applications where Grade 8 strength is specified. Partial threading allows the unthreaded shank to bear shear loads more effectively than a fully threaded fastener, making it appropriate for bolted joints with close-tolerance clearance holes. Sold in a package of 25, it suits both single-repair jobs and light production or maintenance inventory stocking.

Key Features

• 5/8-11 UNC thread size in the inch measurement system
• 3-1/2 inch length under head for deep-reach fastening applications
• Grade 8 steel construction for high-tensile, high-strength bolted joints
• Partially threaded shank improves shear load performance
• Uncoated finish — compatible with applications where coating or plating is not specified
• Conforms to ASME B18.2.1 dimensional standard

Compatibility

Designed as a standard UNC inch-series hex head cap screw suitable for any application specifying a 5/8-11 x 3-1/2 inch Grade 8 partially threaded fastener per ASME B18.2.1.

Installation Notes

Installation should be performed by a qualified mechanic or tradesperson using an appropriate hex socket or open-end wrench sized for a 5/8-11 bolt head. Confirm mating threads are clean, undamaged, and of matching UNC specification before installation. Torque to the value specified in the applicable engineering drawing or fastener standard for Grade 8 fasteners — do not use a torque value not established by the job specification. Store uncoated fasteners in a dry environment to prevent surface oxidation prior to use.