No.3 Milling Point Self-Drilling Screws

No.3 Milling Point Self-Drilling Screws are designed for metal-to-metal fastening, particularly for roofing, steel truss, and applications requiring reliable drilling performance through relatively thick metal plate.

Unlike conventional self-drilling screws, the Milling Point is manufactured using a specialized milling-cut process. This point design is developed to improve drilling speed, cutting ability, and pull-out performance.

SANN MUO manufactures No.3 Milling Point Self-Drilling Screws for roofing and metal construction applications, with different materials, dimensions, coatings, and customized specifications available according to customer drawings and samples.

No.3 Milling Point Self-Drilling Screw Specifications

Specification	Available Options
Product Type	No.3 Milling Point Self-Drilling Screw
Screw Function	Self-Drilling & Self-Tapping
Point Type	No.3 Milling Point
Main Application	Metal-to-Metal Fastening
Other Applications	Roofing, Steel Truss, Thick Metal Plate
Material	Carbon Steel 1022 / 1018
Gauge	#12 – #14
Metric Diameter	M5.5 – M6.3
Imperial Length	1/2" – 10"
Metric Length	12 – 250 mm
Standards	DIN / IFI / ISO / ASTM / ASME
Customization	Drawings and Samples Accepted

What Is a No.3 Milling Point Self-Drilling Screw?

A No.3 Milling Point Self-Drilling Screw is a self-drilling and self-tapping screw designed primarily for metal-to-metal fastening.

The defining feature is its Milling Point drilling tip.

Instead of using a conventional formed drilling point, the milling point is manufactured through a different milling-cut process.

According to SANN MUO's research, the milling point design provides improved:

• Drilling speed
• Cutting ability
• Pull-out force

compared with traditional self-drilling screws.

What Is a Milling Point?

A Milling Point is a specially machined self-drilling screw tip designed to improve the cutting process during drilling.

The point is manufactured using a different milling-cut process from conventional self-drilling screw points.

The objective is to create a more effective cutting action when penetrating metal.

This makes Milling Point Self-Drilling Screws particularly suitable for applications where drilling speed and penetration performance are important.

Advantages of No.3 Milling Point Self-Drilling Screws

Faster Drilling Performance

One of the primary reasons to select a Milling Point Self-Drilling Screw is drilling efficiency.

SANN MUO's research indicates that the Milling Point design can provide better drilling speed than traditional self-drilling screws.

For high-volume installation, even a small reduction in drilling time per screw can contribute to improved overall productivity.

Improved Cutting Ability

The milling-cut geometry is designed to improve the cutting action of the drilling point.

This can be particularly important when fastening:

Metal → Metal

or when the application involves thicker metal components.

Better Pull-Out Performance

SANN MUO's research indicates that Milling Point Self-Drilling Screws can provide improved pull-out force compared with traditional self-drilling screws.

For metal construction applications, screw selection should therefore consider not only drilling performance but also the required fastening strength.

No.3 Milling Point Self-Drilling Screws for Metal-to-Metal Applications

The primary application of this product is metal-to-metal fastening.

Typical applications include:

• Steel-to-steel fastening
• Metal panels
• Light structural metal components
• Steel truss
• Roofing systems
• Metal construction
• Thick metal plate applications

The screw specification should be selected according to the thickness and type of metal being drilled.

No.3 Milling Point Self-Drilling Screws for Roofing

No.3 Milling Point Self-Drilling Screws are suitable for roofing applications where efficient drilling through metal components is required.

The website specifically identifies the product as a Roofing Screw and lists steel truss and thick plate as application areas.

For roofing applications, the screw can be configured with an appropriate washer when sealing is required.

Typical configuration:

Milling Point SDS + EPDM Washer

or

Milling Point SDS + EPDM Steel Bonded Washer

The washer specification should be selected according to the roofing material and required sealing performance.

No.3 Milling Point Screws for Steel Truss

Steel truss applications can require screws capable of penetrating multiple layers or relatively thick steel components.

The Milling Point is designed to improve cutting efficiency during drilling.

This makes No.3 Milling Point Self-Drilling Screws suitable for applications involving:

• Steel truss
• Metal framing
• Steel panels
• Metal-to-metal connections
• Construction components

No.3 Milling Point vs. Traditional Self-Drilling Screws

Feature	No.3 Milling Point SDS	Traditional Self-Drilling Screw
Point Design	Milling Point	Conventional Drilling Point
Drilling Method	Milling-Cut Point	Standard Formed Point
Drilling Speed	Designed for improved speed	Standard
Cutting Ability	Improved	Standard
Pull-Out Force	Improved performance according to SANN MUO research	Standard
Metal-to-Metal	Suitable	Suitable
Thick Plate	Suitable	Application dependent
Roofing	Suitable	Suitable
Steel Truss	Suitable	Suitable
Main Advantage	Drilling efficiency + cutting performance	General-purpose SDS

Milling Point SDS → Faster / Better Cutting / Thick Plate

No.3 Milling Point vs. No.5 Milling Point

Feature	No.3 Milling Point	No.5 Milling Point
Point Type	No.3 Milling Point	No.5 Milling Point
Main Application	Metal-to-Metal	Metal-to-Metal
Roofing	Suitable	Suitable
Steel Truss	Suitable	Suitable
Thick Plate	Suitable	Designed for thicker plate applications
Drilling Performance	Fast / Efficient	Fast / Efficient
Main Selection Factor	General metal-to-metal drilling	Greater penetration requirement
Recommended When	Standard / thicker metal fastening	More demanding thick-plate application

Material and Size Options

The current No.3 Milling Point Self-Drilling Screw specification includes:

Material

• Carbon Steel 1022
• Carbon Steel 1018

Diameter

• #12
• #13
• #14
• M5.5
• M6.3

Length

• 1/2" – 10"
• 12 – 250 mm

Drilling Point

• No.3
• No.5

SANN MUO can manufacture according to DIN, IFI, ISO, ASTM, ASME, or customer drawings and samples.

Coating and Corrosion Protection

For metal construction and roofing applications, surface treatment is an important part of screw selection.

The appropriate coating should be selected according to:

• Indoor or outdoor use
• Humidity
• Salt exposure
• Corrosion requirements
• Expected service environment

For outdoor applications, customers can specify the required corrosion resistance and coating specification when requesting a quotation.

Custom No.3 Milling Point Self-Drilling Screws

SANN MUO can manufacture customized Milling Point Self-Drilling Screws according to customer requirements.

Customization can include:

• Screw diameter
• Screw length
• Head design
• Thread configuration
• Milling point geometry
• Material
• Coating
• Washer
• Surface finish
• Special drilling requirements

Customers can provide:

Existing Screw Sample + Drawing + Application Information

for product evaluation and customized development.

No.3 Milling Point Self-Drilling Screws for B2B Buyers

No.3 Milling Point Self-Drilling Screws are suitable for B2B buyers who require improved drilling performance for metal fastening applications.

Typical customers include:

• Roofing screw distributors
• Fastener wholesalers
• Building material suppliers
• Roofing manufacturers
• Steel construction suppliers
• Metal component manufacturers
• Construction material distributors
• Overseas importers

For buyers currently purchasing conventional SDS products, Milling Point technology can also be evaluated as an alternative or second-source product.

Second Source for Milling Point Self-Drilling Screws

For purchasing teams looking for an alternative supplier, product performance should be evaluated beyond unit price.

Important factors include:

• Drilling time
• Drilling consistency
• Cutting ability
• Pull-out performance
• Material
• Coating
• Screw dimensions
• Installation conditions

SANN MUO can evaluate an existing screw sample or drawing and develop a corresponding Milling Point Self-Drilling Screw.

This allows buyers to test SANN MUO as a second source before making a complete supplier transition.

FAQ About No.3 Milling Point Self-Drilling Screws

Q. What is a No.3 Milling Point Self-Drilling Screw?

It is a self-drilling and self-tapping screw with a specialized No.3 Milling Point designed primarily for metal-to-metal fastening.

Q. What is a Milling Point?

A Milling Point is a specially machined drilling tip manufactured using a milling-cut process.

The design is intended to improve drilling speed and cutting ability compared with conventional self-drilling screw points.

Q. What are No.3 Milling Point Screws used for?

The primary applications are:

• Metal-to-metal fastening
• Roofing
• Steel truss
• Thick metal plate
• Metal construction

Q. Are No.3 Milling Point Screws suitable for roofing?

Yes.

The SANN MUO product page specifically identifies the product as a roofing screw.

For roofing applications where sealing is required, an appropriate EPDM or steel bonded washer can be specified.

Q. Can No.3 Milling Point Screws drill thick metal plate?

Yes. The product is specifically described as providing good performance for thick plate applications.

The actual suitable thickness depends on the material, screw size, drilling point, and installation conditions.

Q. What is the difference between Milling Point and traditional SDS?

The main difference is the drilling-point manufacturing and geometry.

A Milling Point is produced using a different milling-cut process and is designed to provide improved drilling speed and cutting ability.

Q. What is the difference between No.3 and No.5 Milling Point?

Both are Milling Point drilling designs, but they are selected according to different penetration and application requirements.

No.3 is positioned as a general Milling Point solution for metal-to-metal, roofing, steel truss, and thick-plate applications.

No.5 should be selected when the application requires a more demanding thick-plate penetration capability.

Q. What materials are available?

The current product page lists:

• Carbon Steel 1022
• Carbon Steel 1018

Other material or coating requirements can be evaluated according to customer specifications.

Q. What sizes are available?

The current listed range is:

#12 – #14

and:

M5.5 – M6.3

Lengths are available from:

1/2" – 10"

or:

12 – 250 mm.

Q. Can No.3 Milling Point Screws be customized?

Yes.

SANN MUO accepts customer drawings and samples and can manufacture according to DIN, IFI, ISO, ASTM, ASME, or customer-specific requirements.

Q. Can SANN MUO provide samples?

Yes. The product page invites customers to request samples and submit inquiries for product evaluation.