Value Collection 201147PR Button Socket Cap Screw 5/16-24

Product Description

The VALUE COLLECTION 201147PR is a button socket cap screw designed for applications requiring a low-profile fastener head combined with high tensile strength. Manufactured from alloy steel with a black oxide coating, this screw features a 5/16-24 UNF thread and measures 5/8 inch under the head. The button head profile reduces protrusion in assemblies where clearance is critical, while the 3/16-inch hex socket drive allows installation with standard hex keys. Hardness is rated at 36 to 43 HRC, meeting ANSI/ASME B18.3 and ASTM F835 standards. Fully threaded along the shank, it provides consistent clamping force across the full grip length.

This fastener is suited for light machinery, fixtures, jigs, brackets, and general mechanical assemblies where a flush or near-flush head is preferred. The fine 5/16-24 UNF thread pitch offers improved resistance to vibration loosening compared to coarse-thread equivalents, making it a practical choice in applications subject to dynamic loads. The black oxide finish provides mild corrosion resistance in dry or lightly oiled environments and reduces light reflection in precision or optical assemblies. Sold individually with a minimum order quantity of 100 pieces per order.

Key Features

• Alloy steel construction with 36 to 43 HRC hardness per ASTM F835
• Black oxide coating for mild corrosion resistance and low reflectivity
• 5/16-24 UNF fine thread with Class 3A thread fit for close-tolerance assemblies
• Button head profile keeps a low protrusion above the mating surface
• 3/16-inch internal hex socket drive for standard allen wrench installation
• Fully threaded shank along the 5/8-inch length under head
• Right-hand thread direction; conforms to ANSI/ASME B18.3

Compatibility

Designed as a standard UNF button socket cap screw suitable for tapped holes or nuts with 5/16-24 thread specification in general industrial and mechanical assembly applications.

Installation Notes

Install using a 3/16-inch hex key or allen driver; do not use an undersized key as it may strip the socket. Ensure the mating tapped hole or nut conforms to the 5/16-24 UNF thread standard before installation. Black oxide coated fasteners are not rated for outdoor or high-humidity environments without additional lubrication or protective coating. A licensed mechanic or qualified technician should verify torque requirements based on the specific joint design and assembly specifications.