Tek 5 Screws – No.5 Tail Heavy-Duty Self-Drilling Screws

Tek 5 Screws, also known as No.5 Tail Self-Drilling Screws or No.5 Point Self-Drilling Screws, are heavy-duty self-drilling screws designed for fastening thick and heavy steel plates.

The extended No.5 drilling point provides a longer cutting length than standard self-drilling points, allowing the screw to drill through steel plates up to 12 mm thick, while special designs can reach applications up to 18 mm.

SANN MUO offers three No.5 point configurations:

• Normal No.5 Tail
• Tornado No.5 Tail
• Milling Point No.5 Tail

Among these designs, Milling Point provides the fastest drilling performance, while the patented Tornado Point is designed to provide drilling speed close to the Milling Point.

Tek 5 Screws are suitable for steel-to-steel assembly, steel-to-timber fixing, roofing, steel truss, metal siding, and other heavy-duty fastening applications.

Tek 5 / No.5 Tail Self-Drilling Screw Specifications

Specification	Available Options
Product Type	No.5 Tail Heavy-Duty Self-Drilling Screw
Common Names	Tek 5 Screw / Tek 5 Screws / No.5 Tail SDS / No.5 Point SDS
Main Application	Thick Steel / Heavy Steel / Steel-to-Steel
Steel Drilling Capacity	Up to 12 mm
Special Design	Up to 18 mm
Drilling Point	No.5
No.5 Point Options	Normal Tail / Tornado / Milling Point
Head Options	Hex Flange Head / Hex Washer Head
Washer Options	EPDM Washer / EPDM Steel Bonded Washer
Material	Stainless Steel 304 / 316 / 410
Carbon Steel	1022 / 1018
Alloy Steel	10B21 / 10B33
Gauge	#8 – #14
Metric Size	M4 – M6.3
Length	1/2" – 10"
Metric Length	12 – 250 mm
Coating	C1 – C4 / Customized
Head Finish	Customized Painted Head
Standards	DIN / IFI / ISO / ASTM / ASME
Custom Manufacturing	Drawings and Samples Accepted

What Are Tek 5 Screws?

Tek 5 Screws are heavy-duty self-drilling screws equipped with a long No.5 drilling point.

Compared with standard self-drilling screws, the longer drilling point is designed for applications where the screw needs to penetrate a greater thickness of steel.

This makes Tek 5 Screws particularly suitable for:

• Thick steel plates
• Heavy steel structures
• Steel-to-steel assembly
• Steel trusses
• Heavy-duty construction
• Metal structures

The No.5 point can drill through steel plates up to approximately 12 mm, with specially designed versions capable of reaching 18 mm applications.

No.5 Tail for Thick and Heavy Steel

The main advantage of a No.5 Tail Self-Drilling Screw is its extended drilling point.

A longer drilling point provides the cutting length required to penetrate thick steel before the fastening thread engages the material.

This makes the No.5 Tail particularly appropriate when standard drilling points do not provide sufficient drilling capacity.

Typical Application Range

Standard No.5 Tail

→ Heavy steel
→ Thick steel plates
→ Steel-to-steel fastening

Special No.5 Design

→ Extra-thick steel applications
→ Up to approximately 18 mm drilling capacity depending on the design and material conditions.

Three No.5 Tail Self-Drilling Point Designs

One of the most important features of SANN MUO's Tek 5 Screw range is that the No.5 point can be manufactured in three different configurations.

Normal No.5 Tail

The Normal No.5 Tail is the conventional long drilling-point configuration.

It is suitable when the application requires a heavy-duty self-drilling point for thick steel.

Typical applications include:

• Heavy steel plates
• Steel structures
• Steel-to-steel assembly
• General heavy-duty fastening

Tornado No.5 Tail

The Tornado Point is SANN MUO's patented No.5 drilling point design.

According to the current product information, its drilling speed is close to that of the Milling Point while maintaining its own patented point geometry.

This makes Tornado Point an option for customers who want to improve drilling efficiency in thick steel applications.

Milling Point No.5 Tail

The Milling Point No.5 Tail is designed for maximum drilling speed among the three No.5 point configurations.

According to SANN MUO's current product information:

Milling Point has the fastest drilling speed and performs particularly well.

This configuration is especially suitable for applications where installation labor cost and drilling time are major purchasing considerations.

Normal No.5 Tail vs. Tornado Point vs. Milling Point

Feature	Normal No.5 Tail	Tornado No.5 Tail	Milling Point No.5 Tail
Point Type	Standard Long Point	Patented Tornado Point	Milling Point
Main Purpose	Heavy-duty drilling	Faster drilling	Maximum drilling speed
Thick Steel	Excellent	Excellent	Excellent
Drilling Speed	Standard	Fast	Fastest
Technology	Standard No.5	Patented	Milling Point
Best For	General heavy-duty applications	Faster installation	Labor-sensitive applications
Unit Cost	Standard	Higher	Higher
Labor Saving Potential	Standard	High	Highest

Which No.5 Point Should You Choose?

Choose Normal No.5 Tail when you need a reliable heavy-duty drilling point for thick steel.

Choose Tornado No.5 Tail when faster drilling performance is important and you want SANN MUO's patented point design.

Choose Milling Point No.5 Tail when drilling speed and installation labor efficiency are the highest priorities.

Tek 5 Screws for Steel-to-Steel Assembly

Steel-to-steel fastening is the primary application for heavy-duty No.5 Tail SDS.

The long drilling point allows the screw to penetrate thick steel plates before forming the fastening connection.

Tek 5 Screws are suitable for:

• Steel structures
• Heavy steel frames
• Steel trusses
• Thick steel plates
• Metal structures
• Industrial steel assembly

The appropriate No.5 point should be selected according to the total steel thickness and required drilling performance.

Tek 5 Screws for Steel-to-Timber Fixing

No.5 Tail Self-Drilling Screws can also be used for steel-to-timber fixing where the screw specification is appropriate.

The extended drilling point can first penetrate the steel component before engaging the timber substrate.

The appropriate screw length should be selected according to:

• Steel thickness
• Timber thickness
• Required penetration depth
• Application load
• Installation method

Tek 5 Screws for Roofing

Tek 5 Screws can be configured for roofing applications where thick or heavy steel components need to be penetrated.

Available configurations include:

Hex Flange Head + EPDM Washer

or

Hex Washer Head + EPDM Steel Bonded Washer

For roofing, the appropriate washer configuration should be selected according to the screw head, roofing panel, and sealing requirements.

SANN MUO also offers painted screw heads to match roof or wall colors.

Tek 5 Screws vs. Milling Point SDS

Feature	Tek 5 / No.5 Tail SDS	Milling Point SDS
Primary Feature	Long drilling point	High-speed milling point
Main Problem Solved	Thick steel penetration	Fast steel drilling
Thick Steel	Excellent	Excellent depending on point
Drilling Speed	Normal / Fast / Fastest depending on design	Very Fast
Milling Point Available	Yes, as No.5 Milling Point	Yes
Tornado Option	Yes	No
Best Application	Thick / heavy steel	Fast steel-to-steel installation
Labor Cost Saving	High with Tornado / Milling	Very High
Special Strength	Drilling capacity	Drilling efficiency

Self-Drilling Tip Technology

Tek 5 Screws also incorporate SANN MUO's self-drilling tip technologies.

Thread-to-Tip Design

The thread-to-tip design helps the screw penetrate the steel plate while reducing the risk of breaking or damaging the plate.

Nick Point

The Nick Point is a small indentation positioned slightly to the side of the screw tip.

It has been tested in laboratory experiments and by construction workers and is designed to provide consistent and efficient drilling performance.

Asymmetric Thread

The asymmetric thread uses special angles and different pitches in the upper and lower sections of the screw.

This design helps create pull-out resistance and firmly clamp the gap between connected plates.

Straight Knurl

The straight knurl helps expel iron filings generated during drilling and enlarge the hole without damaging the surrounding material.

It is also designed to reduce excessive stretching of the screw diameter and lower the risk of corrosion.

Materials and Size Options

Material

Tek 5 Screws are available in:

• Stainless Steel 304
• Stainless Steel 316
• Stainless Steel 410
• Carbon Steel 1022
• Carbon Steel 1018
• Alloy Steel 10B21
• Alloy Steel 10B33

Size

Available specifications include:

• Gauge: #8 – #14
• Metric: M4 – M6.3
• Length: 1/2" – 10"
• Metric Length: 12 – 250 mm
• Drilling Point: #1 – #5

The No.5 Tail is the primary configuration for this product page.

Coating Options for Tek 5 Screws

Tek 5 Screws can be coated according to the application environment.

Available coating options include:

• C1
• C2
• C3
• C4
• Customized coating specifications

This allows the screw to be configured for different indoor, outdoor, roofing, and corrosive environments.

Washer and Head Options

SANN MUO Tek 5 Screws can be supplied with:

• Hex Flange Head
• Hex Washer Head
• EPDM Washer
• EPDM Steel Bonded Washer

The screw head and washer should be selected according to the application.

Roofing

Flange Head + EPDM Washer

Washer Head Roofing

Washer Head + EPDM Steel Bonded Washer

Indoor Panel Connection

Washer Head

Custom Tek 5 Screw Manufacturing

SANN MUO can manufacture No.5 Tail Self-Drilling Screws according to customer drawings and samples.

Customization can include:

• Screw diameter
• Screw length
• No.5 drilling point
• Normal / Tornado / Milling Point
• Thread specification
• Head type
• Washer
• Material
• Coating
• Painted head
• Special drilling requirements

Products can be manufactured according to DIN, IFI, ISO, ASTM, ASME, or customer-specific drawings and samples.

Tek 5 Screws for B2B and Industrial Applications

SANN MUO supplies No.5 Tail Self-Drilling Screws to B2B customers requiring heavy-duty steel fastening solutions.

Typical customers include:

• Fastener distributors
• Hardware wholesalers
• Steel structure companies
• Steel truss manufacturers
• Roofing suppliers
• Metal siding suppliers
• Construction material suppliers
• Industrial manufacturers
• Overseas importers

For buyers currently using another supplier, an existing Tek 5 screw sample or drawing can be provided for comparison and product development.

FAQ About Tek 5 Screws

Q. What is a Tek 5 Screw?

A Tek 5 Screw is a heavy-duty self-drilling screw with a long No.5 drilling point, designed to penetrate thick steel plates.

It is also called a No.5 Tail Self-Drilling Screw or No.5 Point Self-Drilling Screw.

Q. How thick can a Tek 5 Screw drill?

A standard No.5 Tail can drill through steel plates up to approximately 12 mm.

With a special design and patented drilling point, the drilling capacity can reach approximately 18 mm, depending on the application and material conditions.

Q. What is the difference between No.3 and No.5 self-drilling screws?

The main difference is the length and drilling capacity of the point.

A No.5 point has a longer drilling section and is designed for thicker steel applications.

Therefore, No.5 Tail SDS are generally selected when standard drilling points do not provide sufficient drilling capacity.

Q. What are the three types of No.5 Tail?

SANN MUO offers:

• Normal No.5 Tail
• Tornado No.5 Tail
• Milling Point No.5 Tail

The Milling Point provides the fastest drilling speed, while the patented Tornado Point is designed to achieve drilling speed close to Milling Point.

Q. What is the fastest No.5 Tail self-drilling screw?

Among SANN MUO's three No.5 point configurations, the Milling Point No.5 Tail provides the fastest drilling performance.

The Tornado Point is designed to provide drilling speed close to the Milling Point.

Q. What is a Tornado Point self-drilling screw?

Tornado Point is SANN MUO's patented No.5 drilling point design.

It is designed to provide fast drilling performance in thick steel applications, with drilling speed close to the Milling Point according to the current product information.

Q. Can Tek 5 Screws be used for roofing?

Yes.

Tek 5 Screws can be configured for roofing applications with appropriate head and washer combinations.

Common configurations include:

Flange Head + EPDM Washer

and

Washer Head + EPDM Steel Bonded Washer.

Q. Can Tek 5 Screws be used for steel-to-timber applications?

Yes.

The current product specification identifies steel-to-timber fixing as one of the applications for No.5 Tail Self-Drilling Screws.

Q. What materials are available for Tek 5 Screws?

Available materials include:

• Stainless Steel 304
• Stainless Steel 316
• Stainless Steel 410
• Carbon Steel 1022
• Carbon Steel 1018
• Alloy Steel 10B21
• Alloy Steel 10B33

Q. Can Tek 5 Screws be customized?

Yes.

SANN MUO can customize the screw according to customer drawings, samples, material requirements, dimensions, drilling point, head type, washer, coating, and other specifications.

Q. Can the screw head be painted?

Yes.

SANN MUO can paint the screw head to match the customer's roof or wall color.