![[JT3-DH-2H-6_5-7_0].png](/medias/sys_master/products/products/hfd/h71/9107064061982/-JT3-DH-2H-6-5-7-0-135Wx135H.png "[JT3-DH-2H-6_5-7_0].png")
![[JT3-2H-4_8x19-E14-magaziniert].png](/medias/sys_master/products/products/h3d/he9/9106958581790/-JT3-2H-4-8x19-E14-magaziniert-135Wx135H.png "[JT3-2H-4_8x19-E14-magaziniert].png")
![[JT2-12-5_5].png](/medias/sys_master/products/products/h98/h0f/9106887376926/-JT2-12-5-5-135Wx135H.png "[JT2-12-5_5].png")
For steel substructures
![[TKR-4_8].png](/medias/sys_master/products/products/h21/h38/9106939707422/-TKR-4-8-135Wx135H.png "[TKR-4_8].png")
![[TKE-4_8].png](/medias/sys_master/products/products/heb/hd5/9106944229406/-TKE-4-8-135Wx135H.png "[TKE-4_8].png")
The EJOT portfolio includes products for fastening on thin-walled metal profiles (JF3 self-drilling screws of the EJOFAST® family), steel/steel and aluminium/steel connections (JT3/JT6 bimetall self-drilling screws) as well as aluminium/aluminium connections (JT4/JT9 stainless steel self-drilling screws).
This head style is particularly widespread for drilling and self-tapping screws and is mainly used for fastening sandwich panels in the roof area. As an example, we have the EJOT JT3, JT4 and the JZ5 product series.
You can easily determine the drilling performance of EJOT self-drilling screws yourself by having a look at the screw disignation: For example, an EJOT self-drilling screw JT3-6-5.5 has a maximum drilling performance of 6 mm, a JT3-12-5.5 has a maximum drilling performance of 12 mm.
Much more important, however, is the second point which is especially valid for self-drilling screws for weater-exposed areas (JT3). 2. Hardened drill points: JT3 stainless steel screws feature a drill point made of steel - for strength reasons, therefore they are called "bi-met screws"!
The JZ5 is the strongest self-tapping screw of EJOT to date and scores particularly well when used in high-strength materials. The JT3-6-5.5x25 E16 self-drilling screws are made of stainless steel with a hardened steel drill bit and are used to attach the support profiles to the substructure.
It stops the screwing process at exactly the right moment. With the VARIO JT6-2/5-5.0x30, EJOT offers the ideal fastener for connecting wall brackets to support profiles.
In this part we would like to show you the basic procedures for screw manufacturing, take you on a journey into the production of EJOT and introduce you to the individual production phases using the example of the EJOT self-drilling screw JT3-18-5.5. Two manufacturing processes for thread production First of all, a distinction is made between two different manufacturing processes: machining and forming.
There are both self-drilling screws with low drilling capacity (also called drilling performance) for thin sheet metal and screws with large drilling capacity such as the EJOT JT3-18, which cut through thick substructures made of construction steel up to a thickness of 16 mm.
The EJOT JF and JT screw types are generally considered to be pre-drilled when calculating the edge distances.
A distinction must be made between JT screws (classic drill point with cutting edge) and JF screws (unique tip geometry without cutting edge).