L H Dottie MB143 Hex Head Tap Bolt 1/4x3 100pk

Product Description

The L H Dottie MB143 is a hex head tap bolt sold in a 100-piece pack, designed for general fastening applications across mechanical, electrical, and construction trade work. This 1/4-inch diameter by 3-inch length tap bolt features a hex head drive, allowing installation with standard hex wrenches or socket drivers. The tap bolt configuration is suited for threading into pre-tapped holes or use with a nut where through-fastening is required. Electricians, HVAC technicians, and plumbers commonly use fasteners of this type when securing equipment, brackets, strut, and enclosures during system installation or service work.

The MB143 tap bolts are appropriate for light-gauge steel, sheet metal, and structural fastening tasks found in residential and commercial trade applications. The 3-inch length provides adequate thread engagement for thicker assemblies or stacked material. The 100-piece pack quantity supports job-site use where multiple fasteners are needed across a single project or service run. These bolts are a standard supply item stocked by tradespeople working in HVAC, plumbing, electrical, and general mechanical service.

Key Features

• 1/4-inch diameter hex head tap bolt for use with standard wrenches or socket drivers
• 3-inch length suitable for thicker material stacks and deeper thread engagement
• 100-piece pack supports multi-fastener job-site and installation needs
• Hex head design allows high torque application without fastener cam-out
• Consistent thread form across the pack supports reliable, repeatable installation

Compatibility

Designed as a standard 1/4-inch hex head tap bolt for general trade fastening applications including equipment mounting, bracket installation, and enclosure assembly in HVAC, electrical, and plumbing work.

Installation Notes

Install using a properly sized hex wrench or socket driver rated for the fastener diameter. Ensure the receiving hole is correctly tapped or that a nut is used for through-bolt applications before applying torque. Power down any electrical equipment or shut off relevant systems before accessing panels or enclosures requiring fastener work. Follow applicable NEC, IFGC, or IPC requirements for mechanical fastening in regulated assemblies.