Irwin IR24640 54 Piece Tap and Die Set Unc Unf Npt

Product Description

The IRWIN IR24640 is a 54-piece tap and die set designed for cutting and restoring both external and internal threads across a full range of inch-based thread standards. The set covers UNC, UNF, and NPT thread forms using plug-style taps and hexagon-shaped dies, all manufactured from carbide steel for durability under repeated use. With 23 taps and 23 dies included alongside wrenches, a pitch gauge, and a screwdriver, this set gives a technician everything needed to thread new fastener holes or chase damaged threads on pipe fittings, mechanical assemblies, and equipment fasteners encountered in HVAC, plumbing, and electrical service work.

This set is suited for professional tradespeople who regularly cut or repair inch-standard threads in the field or shop. The inclusion of NPT taper pipe thread taps in 1/8 inch-27 TPI and 1/4 inch-18 TPI makes it directly applicable to plumbing and gas line fitting work. UNC and UNF taps range from 6-32 up to 3/4 inch-10, covering the fastener sizes most commonly encountered in mechanical equipment, HVAC units, electrical enclosures, and general trade work. The two adjustable die stocks and two adjustable handle tap wrenches support the full die and tap range in the set.

Key Features

• 54-piece set includes 23 plug-style taps, 23 hexagon dies, 2 adjustable die stocks, 2 adjustable handle tap wrenches, 1 T-handle wrench, 1 pitch gauge, and 1 screwdriver
• Carbide steel construction for hardness and wear resistance across repeated threading operations
• Covers UNC, UNF, and NPT thread forms — no metric sizes included
• Tap range from 6-32 TPI UNC through 3/4 inch-10 TPI UNC, with matching UNF sizes throughout
• NPT pipe thread taps at 1/8 inch-27 and 1/4 inch-18 for plumbing and gas fitting applications
• Hexagon die profile allows wrench engagement from multiple angles in confined spaces

Compatibility

Designed for use with inch-standard fasteners and pipe fittings following UNC, UNF, and NPT thread specifications. Compatible with the adjustable die stocks and tap wrenches included in the set.

Installation Notes

This set is intended for use by licensed tradespeople including plumbers, HVAC technicians, and electricians performing thread cutting or repair. Always de-energize equipment and isolate any pressurized piping before cutting or chasing threads on installed systems. Use appropriate cutting fluid when tapping steel or cast iron to extend tap life and improve thread quality. Follow applicable code requirements such as IFGC or IPC when threading pipe fittings used in gas or water service.

Technical Specifications

• Set Size: 54 pieces
• Material: Carbide steel
• Thread Standards: UNC, UNF, NPT (inch, non-metric)
• Tap Style: Plug
• Die Shape: Hexagon
• Number of Taps: 23
• Number of Dies: 23
• Tap Size Range: 6-32 TPI UNC through 3/4 inch-10 TPI UNC
• NPT Tap Sizes: 1/8 inch-27 TPI, 1/4 inch-18 TPI
• UPC: 042526246401
• Unit of Measure: Each

Standard Information

• Brand: IRWIN
• Manufacturer Part Number: IR24640