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The VALUE COLLECTION MP30586-1 is a 5/16-18 hex head cap screw made from Grade 316 stainless steel with a 3-inch length under head. The Unified National Coarse (UNC) thread standard and fully formed hex drive make this fastener a straightforward choice for structural and mechanical assembly work. Grade 316 stainless steel provides strong corrosion resistance, making this screw well suited for wet, marine, chemical, and outdoor environments where standard carbon steel fasteners would corrode. The 1/2-inch hex head accepts standard hex wrenches and sockets. This fastener is typically installed by mechanics, pipefitters, HVAC technicians, electricians, and general maintenance trades working with corrosion-resistant assemblies.
This cap screw is used in residential and commercial applications where corrosion resistance is a primary concern. Typical install scenarios include equipment mounting, pipe flange bolting, enclosure assembly, and structural connections exposed to moisture, salt air, or chemical wash-down environments. It is sold in a minimum order quantity of 25 pieces, making it appropriate for both single repairs and small-batch assembly work.
Designed as a standard inch-series hex head cap screw suitable for any application requiring a 5/16-18 UNC threaded fastener in Grade 316 stainless steel.
Install using a 1/2-inch open-end wrench, box wrench, or socket. Ensure the mating tapped hole or nut is also rated for corrosion-resistant service to avoid galvanic incompatibility. Apply anti-seize compound when threading stainless fasteners into stainless or aluminum to prevent galling. Follow applicable mechanical or structural codes for the equipment being serviced.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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