Irwin 97094ZR Tap Die Set 25 Pc Npt Unc Unf

Product Description

The IRWIN 97094ZR is a 25-piece tap and die set covering thread sizes from 1/4-18 to 1-14 across NPT, UNC, and UNF thread standards. The set includes both taps and hex dies machined from carbon steel with a bright finish for corrosion resistance and dimensional consistency. An adjustable die stock and an adjustable hand tap wrench are included, making the set self-contained for field or shop use. Licensed plumbers, pipefitters, HVAC technicians, and maintenance mechanics use this set to cut, clean, and restore external and internal threads on pipe fittings, fasteners, and mechanical components. The plastic carry case keeps pieces organized and protects cutting edges between uses.

This tap and die set is suited for trade applications requiring both pipe threads (NPT) and machine threads (UNC and UNF) in a single kit. NPT coverage makes it directly applicable to plumbing and HVAC piping work where threaded pipe connections are cut or restored on the job. The UNC and UNF dies and taps address fastener thread repair and fabrication across general mechanical and electrical trade work. Die thread sizes included are 1-14, 1-8, 1/4-18, 3/4-10, 3/4-16, 5/8-11, 5/8-18, 7/8-14, 7/8-9, 9/16-12, and 9/16-18.

Key Features

• 25-piece set covering NPT, UNC, and UNF thread standards from 1/4-18 to 1-14
• Carbon steel construction on both taps and dies for durability across standard trade materials
• Bright finish on all cutting tools for corrosion resistance and easy visual inspection
• Hex die shape for consistent wrench engagement and controlled torque application
• Includes adjustable die stock and adjustable hand tap wrench — no separate handle purchase required
• Plastic carry case organizes all 25 pieces and protects cutting edges in tool storage

Compatibility

Designed for cutting and restoring NPT pipe threads and UNC and UNF machine threads on standard carbon steel, iron, and similar materials commonly encountered in plumbing, HVAC, and mechanical trade work.

Installation Notes

Tap and die work should be performed by qualified tradespeople familiar with thread standards and proper cutting technique. Always apply appropriate cutting oil to extend tool life and produce clean threads. On pipe systems, depressurize and drain the line completely before cutting or restoring any threaded connection. Follow applicable codes — IFGC for gas piping threads, IPC for water service threads — when cutting pipe threads for pressurized systems.