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Cold Heading Dies

Dies for fasteners are important working components for fasteners industries to produce screws, bolts, nuts, etc. All types of cold heading die, header punches and thread rolling dies are offered for production in accordance with customer drawings from high-quality tungsten carbides and steel, with the use of coatings on working surfaces.

Our ability to produce many standard and custom dies for fasteners – whether you need cold heading dies, punches, flat/cylindrical thread rolling dies, ejector pins, or cutting dies, means we can help your fastener manufacturing process run smoothly.

Cold heading dies also called tungsten carbide punching, cold forming dies, or heading dies. It is compressed by powder metallurgy, with high hardness, high-strength cemented carbide dies, as an important working component of cold heading machine, completes punching, bending, stretching, etc., and is widely used in the field of production and processing.


Grade WC+Other(±0.5%) Co(±0.5%) Grain Size Density(g/cm3)±0.1 Hardness(HRA)±0.5 TRS(kgf/mm2) Microstructure
ISO 3369 ISO 3738 ISO 3327
KG5 88 12 Medium 14.31 88.3 340
ST1 80 20 Medium 13.4 85.1 251
ST6 85 15 Coarse 13.8 86 270
ST7 80 20 Coarse 13.4 85.3 270
VA80 80 20 Coarse 13.58 84 280
VA90 78 22 Coarse 13.39 82.5 240

Cold heading dies are widely used in cold heading equipment for the production of self-tapping screws, bolts, nuts, rivets, etc.

Automatic Cold Heading for Self Tapping Cold Heading Dies Application

Cold Heading Processing:



Hole Punching

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Tungsten Carbide Cold Heading Dies Products

The punch is a closing element with the help of which the head and working profile to be used for marking, stamping, and extrusion of materials such as heading slots of screw fasteners, bolts, nuts and parts in the hardware industry.


  • Long tool life and high wear resistance creates added value and contributes to production savings.
  • High stability and excellent mechanical strength to work in high power loads.
  • Precision and quality of tool manufacturing improves tool functionality, increases productivity and reduces tool changeover times.

Type of punches:

First Punch for Screws and Self-tapping Screws
First Punch for Screws and Self-tapping Screws
The preliminary punch is used to push the cut workpiece into the substrate in preparation for the final upset workpiece. The role of the first punch is to form a conical set of metal in the die, while the main task is to prefill the head before it is formed.

Second Punches for Screws and Self-tapping Screws
Second punch
Now a variety of types of heading slots of screw header punches are available in UKO: such as ISO, JIS, ANSI, DIN with various types of screw recess like Phillips, Pozi, Slotted, Combination, Hexagon, Socket, Square, 6 Lobe or special specifications for customized design.

Nail Punch Application

In addition to the uncoated second punch, the manufacturer of screw header punches applies Titanium coating to improve tool performance (gold coated one for good resistance to wear and corrosion) and increase tool life (black coated one).

Flat Dies (Flat thread-rolling dies) are used for the manufacture of metric and inch threads in structural steel products, such as bolts, self-tapping screws, and screws. The flat dies system has two die flats (a stationary die and a moving die), the bottom one is held stationary and the other slides. The workpiece is placed on one end of the stationary die then the moving die slides over the workpiece, which causes the workpiece to roll off the stationary lower die in a finished form.
Flat thread rolling dies are available in various thread forms such as ANSI, BS, DIN, JIS, etc. It can be offered with or without holding angles. Flat dies produce external threads by the process of cold forming, utilizing one stationary and one moving die to form the threads.
Materials mainly included Cr12MoV, DC53 and high speed tool steel. Threads are made by rolling, grinding or milling. Flat thread rolling dies with precision class 1, 2 or 3 can be manufactured.
Flat thread rolling dies are produced with excellent heat treatment and are truly durable. The hardness of the die after heat treatment is 63HRC. Under normal operating conditions, the average service life of one set of flat dies exceeds 2 million pieces.

Type of Flat Dies

  • Single face diesSingle face dies
  • Duplex face diesDuplex face dies

drawing for flat dies

We are able to design tools and accessories according to the finished product drawings and technical requirements. It is necessary to specify the model of the machine, the material of the dies, the dimensions of the dies, the diameter of the wire, the dimensions of the product, the accuracy and pitch of the thread, the metric and inch specification of the thread, the shape of the outer surface of the dies (round, square, hexagonal, prismatic), the dimensions S, H, L1, L2 and the number of sets to be purchased.

Machine type S H L1 L2
(die width) (die height) (fixed length) (adjustable length)
Machine No. 0 19 25 51 64
Machine No. 3/16 25 25/40/45/53 75 90
Machine No. 1/4 25 25/40/55/65/80/105 100 115
Machine No. 5/16 25 25/40/55/65/80/105 127 140
Machine No. 3/8 25 25/40/55/65/80/105 150 165
Machine No. 1/2 35 55/80/105/125/150 190 215
Machine No. 3/4 38 55/80/105/125/150 230 265
Machine No. 003 15 20 45 55
Machine No. 004 20 25 65 80
Machine No. 4R 20 25/30/35/40 65 75
Machine No. 6R 25 25/30/40/55/65 90 105
Machine No. 8R 25 25/30/40/55/65/80/105 108 127
Machine No. 250 25 25/40/55 110 125
Machine No. DR125 20.8 25/40/55 73.3 86.2
Machine No. DR200 20.8 25/40/53/65/80 92.3 105.2 gradient 5º
Machine No. DR250 23.8 25/40/54/65/80/105 112.1 131.2 gradient 5º

UKO flat thread rolling die is used for processing external threads for bolts, self-tapping screws, wood screws, drywall screws, machine screws, etc.
Application of Flat Thread Rolling Dies

Cylindrical Dies or Thread rolling dies/Profiling dies are a type of thread rolling tool using the outer surface of two rolling dies to process a variety of threads, knurls and helical gears. The workpiece is typically placed on a supporting blade. At least one rolling slide has a feed movement to perform the forming process. Simultaneously the dies are rotating synchronously in contact with the workpiece, whereas the profile will be formed out.
UKO Cylindrical Thread Rolling Dies are made of the highest quality materials. Manufactured to exacting standards, we can offer standard and customized thread rolling dies for in-feed and through-feed applications. Thread forms are precision ground and dies are produced to fit most types of circular screw bolts thread rolling machine.


  • Made of selected tool steel Cr12MoV, high hardness and wear-resistance for a long lifespan.
  • Uniform accurate threads for meeting precision threading demands.
  • Smooth surface to produce a better thread.
  • Easy installation and reduced setup time for higher production rates.
  • Regrinding service is available.

Thread rolling dies drawing

ALONSO P10 170mm