Value Collection 701153PR Button Socket Cap Screw 5/16-18

Product Description

The VALUE COLLECTION 701153PR is a button socket cap screw designed for applications requiring a low-profile fastener head with a hex socket drive. Sized at 5/16-18 UNC thread by 2-1/4 inches in length under the head, this screw is fully threaded and manufactured from alloy steel with a black oxide finish for corrosion resistance in dry or mildly humid environments. It meets ANSI/ASME B18.3 and ASTM F835 standards, with a hardness rating of 36-43 HRC and a 3A thread fit class. Electricians, millwrights, HVAC technicians, and mechanical contractors reach for this fastener when clearance above the fastener head is limited.

The 701153PR suits general mechanical assembly, equipment mounting, panel attachment, and structural bracketing where a standard hex cap screw head would protrude too far. The button head profile distributes clamping load over a wider bearing surface than a flat-head screw. The black oxide treatment provides a clean, low-glare appearance often required in visible equipment enclosures or rack-mounted assemblies. It is sold individually but must be ordered in multiples of 10.

Key Features

• Button head profile reduces fastener stack height for tight-clearance installations
• 5/16-18 UNC fully threaded, 2-1/4 inches length under head
• Alloy steel construction with 36-43 HRC hardness for high-strength applications
• Black oxide coating for mild corrosion resistance and low-glare finish
• 3/16 inch hex socket drive compatible with standard Allen wrenches and hex bits
• Meets ANSI/ASME B18.3 and ASTM F835 standards

Compatibility

Designed as an OEM-style and aftermarket replacement fastener for general mechanical assemblies using 5/16-18 UNC threaded holes requiring a button head socket cap screw per ANSI/ASME B18.3 and ASTM F835.

Installation Notes

Installation is performed with a 3/16 inch hex key or hex bit driver. Ensure the mating threaded hole or nut is clean and free of debris before driving the fastener. Do not exceed the torque capacity appropriate for the 3A thread fit and alloy steel grade. Always de-energize or de-pressurize equipment before fastener service where electrical or pressurized systems are involved.