Irwin 24612 Tap Die Set Unc 1/4-20 to 1/2-13 12 Pc

Product Description

The IRWIN 24612 is a 12-piece tap and die set covering UNC thread sizes from 1/4-20 through 1/2-13. Taps and dies are machined from carbon steel with a bright finish for corrosion resistance during storage and use. The hex-profile dies measure 1 inch across the flats and are non-adjustable, providing consistent thread geometry on each pass. The set includes an offset adjustable tap wrench and a plain die stock, giving technicians the hand tools needed to cut or chase both internal and external threads without sourcing additional accessories. Plumbers, HVAC mechanics, and electricians use sets like this for field repairs, rethreading damaged fasteners, and fabricating threaded connections on conduit, fittings, and mounting hardware.

This set is suited for residential and light commercial maintenance work where standard UNC inch-series threads are the norm. Covered thread sizes include 1/4-20, 5/16-18, 3/8-16, 7/16-14, and 1/2-13, which represent the most common fastener sizes encountered in mechanical, plumbing, and electrical trades. The compact plastic case keeps components organized and protects cutting edges between jobs, making it practical for a service van or shop toolbox.

Key Features

• Covers five UNC thread sizes: 1/4-20, 5/16-18, 3/8-16, 7/16-14, and 1/2-13
• Carbon steel construction on all taps and dies for durability in hand-threading applications
• Bright finish on taps reduces friction and aids visual inspection for wear
• 1-inch hex die profile fits standard plain die stocks
• Includes offset adjustable tap wrench and plain die stock — no additional wrenches required
• Molded plastic case organizes all 12 pieces and protects cutting edges

Compatibility

Designed for cutting and chasing standard UNC inch-series threads; compatible with any application requiring 1/4-20 through 1/2-13 fastener thread profiles in steel, aluminum, and similar materials.

Installation Notes

Thread cutting with taps and dies is typically performed by licensed tradespeople or experienced technicians familiar with hand-threading procedures. Use appropriate cutting oil to extend tool life and produce clean threads; dry threading will accelerate wear on carbon steel cutting edges. Back off the tap or die periodically to break chips and prevent binding, especially in deeper holes. Inspect threads with a go/no-go gauge where code-required or safety-critical fastener joints are involved.