A4 Stainless Steel Metal Tapping Screws

The phrase Metal Tapping Screws may refer to either thread rolling screws or self drilling tek screws, both of which form the mating thread on installation. A seperate tapping operation is therefore not required.

Thread rolling screws incorporate an ISO metric machine type thread. The triangular shaped tip design allows the thread rolling screw to cold form the female thread. These items are manufactured to DIN 7500, a standard that covers several head and drive types.

Self drilling tek screws are designed to drill and tap their own fixing hole, again reducing the number of operations required to make the joint. There are a number of different variants available specific to the task at hand. The examples below are for metal to metal operations.

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Fastener Material Key
Evo	Evoshield® - A special triple layered ceramic surface coating developed by Evolution to prevent corrosion in pollutive and atmospheric conditions.
A2	A2 Stainless Steel - Also known as grade 304 or 18/8. A general purpose grade of stainless steel.
A4	A4 Stainless Steel - Also known as grade 316 or 18/8/3. A higher corrosion resistant, marine grade of stainless steel.
BZP	Bright Zinc Plated (BZP) Steel - Non-stainless standard steel grade offering a basic level of corrosion resistance.

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Hex Head Tek Screws for Light Steel Section 1.2mm to 3.5mm

Standard hex headed self drilling screw or tek screw. Designed to attach to light section steel of 1.2mm to 3.5mm thickness. The lightest duty standard tek screw from Evolution - tek 3.

Hex Head Tek Screws for Light Steel Section 1.2mm to 3.5mm

Standard hex headed self drilling screw or tek screw. Designed to attach to light section steel of 1.2mm to 3.5mm thickness. The lightest duty standard tek screw from Evolution - tek 3.

Hex Head Tek Screws for Light Steel Section 1.2mm to 3.5mm with Bonded EPDM Washer

A version of the standard hex headed self drilling screw or tek screw, tek 3, with the addition of an EDPM bonded washer for applications that require a waterproof seal. For fixing to light steel section of between 1.2mm and 3.5mm thickness.

Hex Head Tek Screws for Light Steel Section 1.2mm to 3.5mm with Bonded EPDM Washer

Hex Head Tek Screws for Heavy Steel Section 4.0mm to 12.5mm with Bonded EPDM Washer

Identical to the heavier duty standard hex headed self drilling screw or tek screw, tek 5, with the addition of the integrated EPDM washer for situations where a waterproof seal is required. For attaching to heavy steel section of thickness between 4.0mm and 12.5mm.

Hex Head Tek Screws for Heavy Steel Section 4.0mm to 12.5mm with Bonded EPDM Washer

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