Value Collection 307247BR Hex Socket Cap Screw 1-8 Unc

Product Description

The VALUE COLLECTION 307247BR is a partially threaded hex socket cap screw designed for high-strength mechanical fastening applications. It features a 1-8 UNC thread size and measures 6.5 inches in length under the head. The 5/8-inch hex drive accepts a standard hex key or Allen wrench. Constructed from alloy steel with a black oxide finish coating, this fastener meets ASTM A574 specifications, making it suitable for demanding structural and mechanical assembly work. The black oxide coating provides mild corrosion resistance and reduces light glare in finished assemblies. This screw is sold individually and is a common choice for machinists, millwrights, and maintenance technicians.

This hex socket cap screw is used in a wide range of industrial, manufacturing, and mechanical maintenance applications where a recessed-drive, high-strength fastener is required. The 1-8 UNC coarse thread is well suited for general-purpose fastening into steel, cast iron, and other ferrous components. The partial threading allows the unthreaded shank to act as a precise locating feature in close-tolerance assemblies. Typical install scenarios include machine frames, fixtures, tooling plates, and structural brackets where torque capacity and flush or countersunk head clearance are priorities.

Key Features

• 1-8 UNC coarse thread for compatibility with standard tapped holes in ferrous materials
• 6.5-inch length under head accommodates deep-reach fastening requirements
• 5/8-inch hex socket drive accepts standard Allen wrenches and hex bit drivers
• Partially threaded shank serves as a precision locating feature in close-tolerance joints
• Alloy steel construction meets ASTM A574 mechanical requirements for high-strength fasteners
• Black oxide finish provides mild corrosion resistance and a low-reflectance appearance

Compatibility

Designed as an OEM-style or maintenance replacement hex socket cap screw for industrial machinery, fixtures, and structural assemblies that require a 1-8 UNC high-strength fastener conforming to ASTM A574.

Installation Notes

Installation is typically performed by machinists, millwrights, or maintenance technicians using a 5/8-inch hex key or torque wrench with a hex bit. Ensure the mating tapped hole is clean, properly sized for 1-8 UNC, and free of debris before driving the fastener. Apply thread lubricant or anti-seize compound as appropriate for the base material and service environment. Follow applicable torque specifications published in ASME or ASTM A574 reference tables for the fastener grade and lubrication condition used.