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The L H Dottie Co U150 is a machine screw sized 5/16-18 x 1-1/2 inches, designed for general fastening applications in mechanical, electrical, and plumbing installations. The 5/16-18 designation indicates a 5/16-inch major diameter with 18 threads per inch on a unified coarse (UNC) thread pattern. At 1-1/2 inches in length, this screw provides adequate thread engagement for standard hardware connections. It is sold individually and is a common fastening component used by trade professionals across multiple disciplines.
This screw is suited for use in a wide range of commercial and residential trade applications, including equipment mounting, conduit support hardware, mechanical assembly, and structural fastening tasks. It is a standard hardware accessory appropriate wherever a 5/16-18 UNC fastener is specified in the installation instructions or plans. Electricians, HVAC technicians, plumbers, and general mechanical contractors commonly stock this size for field use.
Designed as a standard UNC machine screw for use in hardware accessory and trade fastening applications wherever a 5/16-18 x 1-1/2 inch fastener is required.
Installation is performed by the appropriate licensed trade professional based on the application. Power down or de-energize any equipment before fastening near electrical components. Use the correct driver or wrench size to avoid stripping the head or damaging the thread. Follow applicable codes and equipment manufacturer instructions for torque and fastener specification 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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