Value Collection 201133P Button Socket Cap Screw 5/16-18

Product Description

The VALUE COLLECTION 201133P is a button head socket cap screw designed for applications where a low-profile fastener head is required. Sized at 5/16-18 (UNC) thread with a 1/2-inch length under the head, it is fully threaded and driven with a 3/16-inch hex socket. Constructed from alloy steel with a black oxide finish, this screw meets ANSI/ASME B18.3 and ASTM F835 standards. A hardness rating of 36-43 HRC gives it the strength needed for demanding mechanical assemblies. It is suited for use by machinists, millwrights, maintenance technicians, and general mechanical contractors.

This fastener is used in a wide range of industrial and mechanical applications where a standard hex cap screw head would protrude too far or interfere with adjacent components. The button head profile distributes clamping load across a wider bearing surface than a flat head, making it a common choice in machine frames, guards, fixtures, and equipment panels. It is installed in both light manufacturing and heavy industrial environments.

Key Features

• Button head, low-profile design reduces interference with surrounding components
• Fully threaded 5/16-18 UNC right-hand thread, Thread Fit Class 3A
• 3/16-inch hex socket drive for standard hex keys or socket drivers
• Alloy steel construction with black oxide coating for corrosion resistance and reduced light reflection
• Hardness rated 36-43 HRC for high-strength fastening applications
• Conforms to ANSI/ASME B18.3 and ASTM F835 dimensional and mechanical standards

Compatibility

Designed as an OEM-style and general-use replacement or supplemental fastener for any assembly requiring a 5/16-18 UNC fully threaded button socket cap screw with a 1/2-inch grip length.

Installation Notes

Installation is performed by machinists, maintenance technicians, or mechanical contractors using a 3/16-inch hex key or bit driver. Verify the mating threaded hole is clean and free of debris before installation. Do not exceed the rated hardness range of the fastener by using impact tools without appropriate torque control. Refer to applicable ANSI/ASME standards for recommended torque values based on thread size and application.