Value Collection 011543P Hex Socket Cap Screw 1-8 Unc

Product Description

The VALUE COLLECTION 011543P is a partially threaded hex socket cap screw engineered for high-strength bolted connections in industrial, mechanical, and structural applications. It carries a 1-8 UNC thread designation with a 5-inch length under head and accepts a 3/4-inch hex drive for installation with a standard hex key or Allen wrench. Constructed from alloy steel with a black oxide finish, this fastener delivers solid corrosion resistance and surface hardness suited to demanding service environments. It meets ASME/ANSI B18.3 and ASTM A574 standards, confirming compliance with recognized dimensional and mechanical requirements for socket cap screws.

This fastener is used across a wide range of trade and industrial settings including machinery assembly, equipment mounting, maintenance repair, and fabrication work. The coarse 1-8 UNC thread profile is well suited to general-purpose steel-to-steel clamping where rapid assembly and high clamping load are priorities. The partial threading allows the unthreaded shank to act as a pilot in close-tolerance clearance holes, improving joint alignment and shear load distribution. Machinists, millwrights, and maintenance technicians are the most common installers.

Key Features

• 1-8 UNC coarse thread for reliable clamping in general-purpose steel assemblies
• 5-inch length under head accommodates substantial grip lengths
• Partial threading with unthreaded shank for improved shear resistance and hole alignment
• Alloy steel construction meets ASTM A574 mechanical requirements
• Black oxide finish provides mild corrosion resistance and reduces light reflection
• 3/4-inch hex drive compatible with standard hex keys and socket drive tools

Compatibility

Designed as a standard ASME/ANSI B18.3 socket cap screw for use in any 1-8 UNC tapped hole application requiring a 5-inch grip length and hex socket drive.

Installation Notes

Installation is performed with a 3/4-inch hex key or Allen-head socket drive tool. Ensure the mating tapped hole is clean, free of debris, and cut to 1-8 UNC specification before threading the fastener. Apply thread lubricant or anti-seize as required by the service environment to achieve accurate clamp load. Follow applicable torque guidelines from ASME or the equipment manufacturer for ASTM A574 alloy steel socket cap screws at this diameter.