What is a Class 3 TEK screw?

Class 3 fasteners are commonly used in areas where there are moderate levels of airborne pollution or coastal areas with low salt levels. They should be able to withstand 1000 hours of salt spray/fog testing, without showing more than 5% red rust on the surface of the fastener head.

What are Tek 3 screws?

What grade are Tek screws?

Metal TEK® roofing screws are crafted from cold-heading quality steel that complies with ASTM A548, Grade 1022.

What is class 3 Galvanised screws?

A general fixing into timber with a special 6 ribs self embedding head. The six ribs design will ream through light cement sheeting, chipboard and timber, allowing the head to sit below the surface, facilitating easy filling.

What does Tek mean for screws?

Tek screws, also called self-drilling screws, are self-tapping fasteners that have a drill bit end allowing them to be used for screwing materials such as wood and metal together without pre-drilling. Tek screws are best fitted with a high-speed impact drive.

PATTA Self-Drilling Screw Series

Do you need to pre drill Tek screws?

Each Tek screw features a carving piece on its tip, which is what makes self-drilling possible. This means you don't need to create a pilot hole before the fastener, and it also means your work moves forward efficiently.

How much weight can a tek screw hold?

Typically, a self-tapping screw can sustain around 80 to 100 pounds of weight.

What is the difference between Class 3 and Class 4 screws?

As a minimum, we recommend using Class 3 fasteners with AZ150 roof sheeting material. Class 4 fasteners are needed in areas with discernible levels of airborne pollution or coastal areas with moderate to high salt levels.

Can I use Galvanised screws in treated pine?

When a galvanised fastener is used in treated pine, its zinc content is targeted by the copper oxide; it is then depleted of its electrons, and then accelerates into corrosion. The process is known as 'oxidation' – also known as 'rusting'.

What is a Class 5 screw?

Grade 5. Manufactured from medium carbon steel and hardened for greater strength and durability, a grade 5 bolt is distinguished by 3 radial lines and promises tensile strengths between 105,000 and 120,000 psi. They are most commonly found in automotive applications or those that require medium strength.

Will TEKS screws rust?

Tek screws are made from high-grade, anti-corrosive material that can withstand rust and corrosion.

Is a tek screw a self-drilling screw?

Self-Drilling Screws are commonly known by the brand name TEK® screws.

Are Tek screws for exterior?

With over 50 years of experience and innovation, Teks Metal Fasteners delivers Pros' with optimal drilling performance and holding power. Offered in a variety of types covering interior and exterior Metal-to-Metal, Metal-to-Wood, and Wood-to-Metal applications.

What are Tek 5 screws used for?

This is why TEK 5 screws are used for fastening into structural steel. As a general rule of thumb, the higher the TEK number (the longer the drill point), the thicker the metal. It is fundamental that the point is high enough on the TEK scale to pierce the metal being drilled into.

What is a #8 tek screw?

View Screws Catalog PDF. Our DR170A #8 tek screws are oval head phillips and 1 1.4″ long These screws are also self drilling and tapping.

Can Tek screws be used in structural steel?

Larger Tek screws (No. 3 Tek and above) are strong enough to penetrate 12~20-gauge galvanized steel, as well as 3/8” to ½” (10~12.5 mm) structural steel and can be used on various civil and naval engineering applications.

What screws are best for outdoor use?

What is the best screws for timber?

Among the many materials wood screws are made from — brass, bronze, aluminum, etc. — steel screws are the most useful for woodworking and interior DIY projects. They're strong, affordable and readily available in a vast range of sizes. But old-fashioned tapered steel wood screws can be a pain to use.

Are stainless steel screws OK for treated pine?

Are Stainless Steel Fasteners OK with treated timber? Stainless steel fasteners are proven by a study conducted by BRANZ in New Zealand that stainless steel is the best fastener material to use in treated timber.

What size TEK screw do I need?

Typically, stitching screws are 6.3mm diameter (equivalent to 14g), whereas standard tek screws are 5.5mm (equivalent to 12g). A 16mm EPDM washer is supplied with each screw, and it provides a water tight fixture for use in roofing applications.

How are Tek screws measured?

To measure the diameter of screws and bolts, you measure the distance from the outer thread on one side to the outer thread on the other side. This is called the major diameter and will usually be the proper size of the bolt.

What kind of screws do I use for metal roofing?

Metal Roofing - Use zinc plated screws, which will be referred to as galvanized screws. The screw heads should be painted the same color as your metal roofing or siding panels.

Do thicker screws hold more weight?

Generally, the thicker that the screw is, the more weight it will be able to hold. You might also want to check the product specifications before you purchase them. This will allow you to pick the right screw for your project. As an example, if you are working with wood, you'll need wood screws.

Are TEKS screws stainless steel?

Stainless Steel Self Drilling Tek Screws or stainless teks are self drilling stainless sheet metal screws with a drill point tip or self tapping tip. Stainless Teks are self drilling screws used in metal without the need of a pre-drilling hole.

Can you use an impact driver for TEK screws?

This was addressed by the National Frame Building Association (NAFB)*, Metal Construction Association (MCA)*, Canadian Sheet Steel Building Institute (CSSBI)* and others including manufactures warning against using an Impact driver with TEK Self-Drilling or Self Tapping screws.