Value Collection 701145PR Button Socket Cap Screw 5/16-18

Product Description

The VALUE COLLECTION 701145PR is a button socket cap screw designed for applications requiring a low-profile head and high clamping strength. It features a 5/16-18 UNC thread with a 1-1/4 inch length under the head and is driven by a 3/16 inch hex socket. Manufactured from alloy steel with a black oxide finish, this fastener meets ANSI/ASME B18.3 and ASTM F835 standards. Hardness is rated at 36-43 HRC, making it suitable for demanding mechanical assemblies where strength and a flush appearance are required. The fully threaded shank and Class 3A thread fit ensure consistent engagement across compatible tapped holes.

This screw is used in general mechanical, industrial, and light structural assemblies where a button-head profile is preferred over a standard hex cap or flat-head fastener. The low-domed head reduces snagging on adjacent components and is commonly found in machine guards, panels, brackets, and fixtures. The black oxide coating provides mild corrosion resistance and a clean appearance in finished assemblies. Machinists, millwrights, and maintenance technicians are the primary installers.

Key Features

• 5/16-18 UNC fully threaded shank with Class 3A thread fit for consistent mating
• 1-1/4 inch length under head suits moderate-depth fastening applications
• Alloy steel construction rated 36-43 HRC for high tensile and shear strength
• Black oxide finish provides mild corrosion resistance and low reflectivity
• 3/16 inch hex socket drive for use with standard hex keys and socket drivers
• Meets ANSI/ASME B18.3 and ASTM F835 dimensional and mechanical standards

Compatibility

Designed as a standard UNC replacement or new-installation fastener for any tapped 5/16-18 hole requiring a button socket cap screw per ANSI/ASME B18.3.

Installation Notes

Install using a 3/16 inch hex key or T-handle driver rated for the torque requirements of the application. Confirm the mating hole is tapped to 5/16-18 UNC before installation. Right-hand thread direction requires clockwise tightening. Always follow applicable mechanical or structural assembly codes for torque specifications relevant to the joint material and load requirements.