Value Collection B10023 Flat Socket Cap Screw 1/2-13 X 4 in

Product Description

The VALUE COLLECTION B10023 is a flat socket cap screw designed for applications requiring a flush or countersunk fastening profile. Sized at 1/2-13 UNC thread with an overall length of 4 inches, this screw is partially threaded and driven by a 5/16-inch hex socket. It is manufactured from alloy steel with a black oxide finish that provides moderate corrosion resistance and reduces light reflection. This fastener is appropriate for mechanical assemblies, structural connections, and equipment fabrication where a low-profile head is required. Installation is performed by machinists, millwrights, maintenance technicians, and general trade professionals.

This screw suits residential and commercial applications where a countersunk fastener is needed to keep surfaces flush. Partial threading allows the unthreaded shank to bear shear loads, making it a common choice in clamping fixtures, machine frames, and structural brackets. The black oxide finish is well suited for indoor mechanical environments and lightly controlled shop conditions. It meets the Fastener Standard ASME/ANSI B18.3 and ASTM F835.

Key Features

• Flat head profile for countersunk, flush-surface installations
• 5/16-inch hex socket drive for precise torque application with a standard hex key or Allen driver
• 1/2-13 UNC thread form for broad compatibility with standard tapped holes and hex nuts
• Partially threaded shank provides shear strength in close-tolerance assemblies
• Alloy steel construction delivers high tensile strength for demanding mechanical applications
• Black oxide finish reduces surface reflection and offers basic corrosion resistance in dry environments

Compatibility

Designed as an OEM-style replacement or standard-stock fastener for any assembly requiring a 1/2-13 UNC flat socket cap screw with a 4-inch overall length, conforming to ASME/ANSI B18.3 and ASTM F835 standards.

Installation Notes

Installation should be performed by a qualified mechanic, machinist, or maintenance technician familiar with fastener torque requirements for the specific alloy steel grade. Always ensure the receiving hole is properly countersunk to the correct angle to match the flat head profile before driving. Use a calibrated torque wrench with the appropriate 5/16-inch hex bit to avoid stripping the socket. Consult the equipment manufacturer or applicable ASME standards for torque specifications relevant to your application.