Hex Threading Dies

About Hex Threading Dies

Hex threading dies cut external threads onto bolts, rods, studs, and pipe nipples, and their six-sided body lets a standard wrench drive them without a dedicated die stock. The category spans four main thread families: Unified National Coarse, Unified National Fine, National Pipe Taper for plumbing and gas lines, and metric. Prices in this selection run from $6.92 for the IRWIN 9738 up to $16.99 for the Npt x-n-die-1-2 pipe threading die, putting the large majority of individual dies well under $15. Material and finish are the two specs that separate everyday dies from professional-grade ones. Most of the Irwin lineup carries a brushed blend-alloy construction, keeping costs low while providing adequate hardness for standard SAE fastener repair. The Century 98212 steps up to high carbon steel with a powder coated finish sized 9/16-18 NF, the only high carbon option in this group and the listing with the most verified ratings at 349. Weights range from 0.16 ounces for the compact IRWIN 9738 and IRWIN 9445 up to 3.17 ounces for the full-bodied Npt x-n-die-1-2, so confirm dimensions when clearance is limited. For most DIYers restoring corroded fasteners or chasing threads on existing hardware, any of the 4.8-star Irwin dies at $6.92 to $13.10 will cover common SAE sizes. Trade professionals doing pipe work should look at the Npt x-n-die-1-2 at 1/2"-14 or the Drill DWTHXNPT38 for NPT applications, both priced around $16 to $17. Anyone working on metric assemblies will find the M12 x-die-m12-1.5 at $11.99 purpose-built for M12 x 1.5mm threads, currently one of the most actively purchased options in the group.