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The VALUE COLLECTION R63091323 is a brass hex head cap screw designed for threaded fastening applications requiring corrosion resistance and reliable clamping force. This screw features a 5/16-18 Unified National Coarse (UNC) thread with a 1-inch length under head and a 1/2-inch hex drive. Brass construction makes it well suited for environments where galvanic compatibility with non-ferrous metals is required or where rust resistance is a priority. HVAC techs, plumbers, and electricians commonly reach for brass fasteners when working near dissimilar metals or in humid, corrosive, or wet service conditions.
This fastener is used across mechanical, plumbing, HVAC, and electrical trade applications wherever a 5/16-18 UNC threaded connection is specified. Typical installation scenarios include panel mounting, equipment covers, valve assemblies, and junction box hardware where brass is preferred over steel for compatibility or code reasons. The hex head allows installation with a standard open-end wrench or socket driver, making it practical for field service and equipment assembly work.
Designed as a standard inch-series hex head cap screw for any application calling for a 5/16-18 UNC threaded fastener in brass.
Install using a 1/2-inch open-end wrench or socket driver. De-energize and de-pressurize any equipment before replacing or installing fasteners in live systems. Brass is a softer material than steel — avoid over-torquing, which can strip threads or deform the fastener head. Follow equipment manufacturer guidelines and applicable codes for fastener torque and material requirements.
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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