Value Collection 201111PR Button Socket Cap Screw 1/4-28

Product Description

The VALUE COLLECTION 201111PR is a fully threaded button socket cap screw designed for applications requiring a low-profile head and high clamping strength. Sized at 1/4-28 UNF with a 3/4-inch length under head, this fastener is machined from alloy steel and finished with black oxide coating to provide moderate corrosion resistance and a clean matte appearance. It accepts a 5/32-inch hex key drive and meets ANSI/ASME B18.3 and ASTM F835 standards. Hardness is rated at 36-43 HRC, making it suitable for demanding mechanical assemblies where a flush or recessed head is required.

This button socket cap screw is used across a range of industrial, mechanical, and precision assembly applications. The button head profile distributes clamping load over a wider bearing surface compared to a standard socket head, making it a common choice in machine guarding, enclosure panels, jigs, fixtures, and light structural assemblies. It is appropriate for both OEM manufacturing and field maintenance environments where a hex key wrench is the preferred drive method.

Key Features

• 1/4-28 UNF thread standard for fine-thread engagement and vibration resistance
• 3/4-inch length under head, fully threaded
• Alloy steel construction rated 36-43 HRC hardness
• Black oxide finish for moderate corrosion protection and reduced glare
• 5/32-inch hex socket drive compatible with standard hex keys
• Meets ANSI/ASME B18.3 and ASTM F835 fastener standards

Compatibility

Designed as a standard UNF fine-thread button socket cap screw suitable for use in any application requiring a 1/4-28 thread and button head profile conforming to ANSI/ASME B18.3 dimensions.

Installation Notes

Installation is typically performed by a machinist, millwright, or maintenance technician using a calibrated 5/32-inch hex key or Allen driver. Ensure mating threads are clean and free of debris before driving. Do not exceed the fastener hardness rating by pairing with incompatible base materials. Black oxide finish provides minimal corrosion protection and may benefit from supplemental lubrication in wet or outdoor environments.