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The L H DOTTIE CO MB12112 is a 1/2-13 x 1-1/2 inch hex head bolt designed for fastening applications in mechanical, electrical, and HVAC trade work. The 1/2-13 designation indicates a 1/2-inch nominal diameter with 13 threads per inch, conforming to standard Unified National Coarse (UNC) thread specifications. The hex head drive allows installation with standard open-end, box-end, or socket wrenches. This bolt is sold individually and is a common hardware component used by licensed tradespeople across multiple disciplines.
This hex head bolt is suited for general structural and mechanical fastening tasks encountered in residential and light commercial trade work. Typical applications include equipment mounting, bracket installation, and panel or enclosure assembly across HVAC, plumbing, and electrical service environments. Its standard UNC thread pattern makes it compatible with a wide range of matching nuts and threaded inserts stocked by most trade suppliers.
Designed as a standard UNC hex head bolt for general fastening use across HVAC, plumbing, electrical, and mechanical trade applications where 1/2-13 threaded hardware is specified.
Installation is performed by hand-threading into a matching 1/2-13 nut or tapped hole before tightening with an appropriately sized wrench or socket. Always de-energize and lock out any electrical or mechanical equipment before performing fastener work in proximity to live components. Follow applicable codes including NEC, IFGC, or IPC as relevant to the trade and system being serviced. Do not overtighten, as this can strip threads or damage mating hardware.
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