Value Collection 701211PR Button Socket Cap Screw 1/2-20

Product Description

The VALUE COLLECTION 701211PR is a button socket cap screw designed for fastening applications where a low-profile head and high clamping strength are required. Machined from alloy steel with a black oxide finish, it features a 1/2-20 UNF thread at 1-1/4 inches in length under the head. The button-style head keeps the fastener close to the work surface, while the 5/16-inch hex socket drive allows precise torque application with a standard hex key or Allen driver. With a hardness rating of 36-43 HRC and a Class 3A thread fit, this screw meets ANSI/ASME B18.3 and ASTM F835 standards. Machinists, millwrights, and maintenance technicians are the primary installers.

This fastener is suited for use in machinery, fixtures, brackets, and mechanical assemblies where a countersunk or hex head would interfere with adjacent components. The button head profile makes it a practical choice in panel mounting, guard installation, and light structural assemblies across industrial, manufacturing, and maintenance environments. The black oxide finish provides mild corrosion resistance and a uniform appearance. It is sold individually with a minimum order quantity of 5 units.

Key Features

• Button-style low-profile head keeps fastener below or flush with work surface
• 1/2-20 UNF right-hand thread with Class 3A fit for accurate thread engagement
• Alloy steel construction with 36-43 HRC hardness for high-strength clamping
• Black oxide finish provides mild corrosion resistance and reduces light reflection
• 5/16-inch hex socket drive compatible with standard Allen keys and hex drivers
• Meets ANSI/ASME B18.3 and ASTM F835 fastener standards

Compatibility

Designed as a standard UNF button socket cap screw for use in any tapped 1/2-20 threaded hole requiring 1-1/4 inches of thread engagement length.

Installation Notes

Installation is typically performed by machinists, millwrights, or maintenance technicians using a 5/16-inch hex key or Allen driver. Power down and de-energize any equipment before accessing fastener locations on live machinery. Ensure mating threads are clean and free of debris before driving the screw. Do not substitute impact drivers without proper socket ratings, as this may damage the hex socket recess or distort the thread fit.