Best Hex Threading Dies in 2026

Made of carbon steel

Right-hand cut tools have a cutting action that engages when they are run in a clockwise direction

Hex die is for dressing over bruised or rusty threads

Dies easily lock in position with set screw

For 1-inch hexagon or round dies

Threading tool

Metric and SAE Standard Tap and Die 60-Piece Rethread Set Rethreading Kit for Cutting External and Internal Threads

Size:17 x 9 x 1.9"inch / 43 x 23 x 4.8cm. Weight:4.6lb / 2.1kg. Material upgrading:Alloy Steel 55¡ã- 60¡ã, Sizes Stamped Engraved-etched On the Metal

Metric taps 3x0.5, 4x0.7, 5x0.8, 6x1.0, 7x1.0, 8x1.25, 9x1.25, 10x1.0, 10x1.5, 12x1.75; UNC taps 4-40, 6-32, 8-32, 10-24, 12-24, 1/4, 5/16, 3/8, 7/16, 1/2; UNF taps 10-32, 1/4, 5/16, 3/8, 7/16, 1/2; Metric dies 3x0.5, 4x0.7, 5x0.8, 6x1.0, 7x1.0, 8x1.25, 9x1.25, 10x1.0, 10x1.5, 12x1.75; UNC dies 4-40, 6-32, 8-32, 10-24, 12-24, 1/4, 5/16, 3/8, 7/16, 1/2; UNF dies 10-32, 1/4, 5/16, 3/8, 7/16, 1/2; NPT tap 1/8-27; NPT die 1/8-27; Tap wrench M4-M12 3/16-1/2¡±; T-type tap wrench M3-M16 1/16-1/4¡±

✅ One Set is Enough: Our Die set include 1/4''-20, 5/16''-18, 3/8''-16, 7/16''-14, 1/2''-13, 9/16''-12, 5/8''-11, 3/4''-10, 7/8''-9 and 1''-8 UNC. A variety of dies are sufficient for almost all maintenance and repair work.

✅ Superior Durability: We cooperated with the material research institute to change the ratio of carbon in the material, greatly improve the comprehensive mechanical properties of the material, and greatly increase the service life of our dies.

✅ Precision Thread: The latest production technology maximizes the processing accuracy of the thread, and the outer surface of the threading die is smoother.

1. One Set is Enough: Our 14 Pcs NPT pipe tap & die set includes 1/16"-27, 1/8"-27, 1/4"-18, 3/8"-18, 1/2"-14, 3/4"-14 and 1"-11-1/2. A variety of taps and dies are sufficient for almost all maintenance and repair work.

2. Superior Durability: We cooperated with the material research institute, our NPT taps are made of latest high speed steel and the NPT dies are made of latest high carbon steel. The mechanical properties of the material are higher, and the service life is longer.

3. Precision Right Hand Thread: The latest production technology maximizes the processing accuracy of the thread. Our NPT taper pipe tap and hex die set fully meets the National Pipe Taper (NPT) standard.

Made of Carton Steel

Include a Screw Gauge

1/4"-20 5/16"-18 3/8"-16 7/16"-14 1/2"-13 9/16"-12 5/8"-11 3/4"-10 7/8"-9 1"-8

Tap & Die Set, #4-1/2 Carbon Steel Tap & Die Set with Round Dies

#4 x 1/2" CS Tap & Die Set with Round Die

Comes in plastic carrying case

MATERIAL --- Heat treated 45# steel taps and alloy steel dies are are of good hardness, strong strength and long durability.

PACKAGE INCLUDED --- This set also includes screw pitch gauge that you can use to check created thread. This tool is not used as a precision measuring instrument, rather it allows the user to determine the profile.

DESIGN --- All taps and dies are clearly marked with size for easy and fast finding.

Round Die: Thread size: 5/8-24 UNEF; outside diameter (OD): 38mm / 1.5"; Thickness: 10mm / 0.4"; accuracy class: 6g. Made of alloy tool steel, hardness, high torque, good toughness and wear-resistance.

Applications: Can process, correct or clean the external threads. Suitable for general purpose threading in stainless steel, aluminum alloy, cast iron, copper, iron, aluminum, plastic, etc.. Great for maintenance and repair work on pipes, boards and machinery.

Features: Conical locking hole, strong locking and not loose. Perfect for re-threading existing threads in hard materials like metal and making new threads in soft material such as plastic. The surface is lubricated with grease to prevent rust, the thread is clear and easy to repair.

Round Die: Thread size: 1/2-28 UNEF; outside diameter (OD): 38mm / 1.5"; Thickness: 10mm / 0.4"; accuracy class: 6g. Made of alloy tool steel, hardness, high torque, good toughness and wear-resistance.

Applications: Can process, correct or clean the external threads. Suitable for general purpose threading in stainless steel, aluminum alloy, cast iron, copper, iron, aluminum, plastic, etc.. Great for maintenance and repair work on pipes, boards and machinery.

Features: Conical locking hole, strong locking and not loose. Perfect for re-threading existing threads in hard materials like metal and making new threads in soft material such as plastic. The surface is lubricated with grease to prevent rust, the thread is clear and easy to repair.