Self Drilling Screw

A self drilling screw is a fastener with a drill-shaped point that can drill, tap, and fasten in one step, without the need for pre-drilling. These screws are used for metal-to-metal or metal-to-wood applications, offering faster installation, strong holding power, and reliable performance in roofing, cladding, HVAC, and general construction.

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How Does a Self Drilling Screw Work?

A self drilling screw works by combining a drill bit and screw in one piece. The tip drills its own hole while the threads cut and grip the material tightly. This eliminates the need for pilot holes, making installation faster and reducing equipment requirements on site.

CSK Head Bi-Metal Steel 304 + Carbon Steel M4 x 35mm

Category: COUNTERSUNK HEAD
Tag: Self Drilling Screw

Screw Diameter: M4.0 / #8 gauge Thread form: 16 threads per inch
Screw head drive: #2 Philips Bit
Drill capacity: Up to 6mm thickness (#3 point)
Material: Stainless Steel A2 Body + Case Hardened Carbon Steel Drill Point
Protective Coating: Ruspert Silver AS3566 Class 3

CSK/Flat Head Stainless Steel 410 M4x13mm

Category: COUNTERSUNK HEAD
Tag: Self Drilling Screw

Screw Diameter: M4.0 / #8 gauge
Thread form: 16 threads per inch
Screw head drive: #2 Philips Bit
Drill capacity: Up to 3.5mm thickness (#2 point)
Material: Stainless Steel 410
Protective Coating: Passivated

Hex Wafer Head M5.5-24X25MM

Categories: HEX HEAD, SELF DRILLING SCREWS
Tag: Self Drilling Screw

Screw Diameter: M5.5 / #12 gauge
Thread form: 14 threads per inch
Screw head drive: 5/16” (8mm) Hex Drive
Drill capacity: Up to 6mm thickness (#3 point)
Material: Case Hardened Carbon Steel
Protective Coating: Ruspert Silver AS3566 Class 3

Hex Wafer Head M5.5-24x50mm

Categories: HEX HEAD, SELF DRILLING SCREWS, STEEL FASTENING
Tag: Self Drilling Screw

Screw Diameter: M5.5 / #12 gauge
Thread form: 24 threads per inch
Screw head drive: 5/16” (8mm) Hex Drive
Drill capacity: Up to 13mm thickness (#5 point)
Material: Case Hardened Carbon Steel
Protective Coating: Ruspert Silver AS3566 Class 3

Hex Wafer Head M5.5-24x65mm

Categories: HEX HEAD, SELF DRILLING SCREWS, STEEL FASTENING

Double Thread With Grey EPDM Washer

Screw Diameter: M5.5 / #12 gauge
Thread form: 24 threads per inch
Screw head drive: 5/16” (8mm) Hex Drive
Drill capacity: Up to 6mm thickness (#3 point)
Material: Case Hardened Carbon Steel
Protective Coating: Ruspert Silver AS3566 Class 3

Hex Wafer Head M6.3-24x22MM

Categories: HEX HEAD, SELF DRILLING SCREWS, STEEL FASTENING

Screw Diameter: M6.3 / #14 gauge
Thread form: 14 threads per inch
Screw head drive: 3/8” (10mm) Hex Drive
Drill capacity: <2.5mm thickness (Reduced point)
Material: Case Hardened Carbon Steel
Protective Coating: Ruspert Silver AS3566 Class 3

Pan Head Stainless Steel 410 M4x19mm

Category: PAN HEAD
Tag: Self Drilling Screw

Wafer Head M5.0-24x25MM

Categories: SELF DRILLING SCREWS, STEEL FASTENING, WAFER HEAD

Screw Diameter: M5 / #10 gauge
Thread form: 24 threads per inch
Screw head drive: #2 Philips Bit
Drill capacity: Up to 3.5mm thickness (#2 point)
Material: Case Hardened Carbon Steel
Protective Coating: Ruspert Silver AS3566 Class 3

Button Head

Categories: SELF DRILLING SCREWS, STEEL FASTENING

Hex Head

Categories: SELF DRILLING SCREWS, STEEL FASTENING

Ready to source premium self drilling screws for your next project?

Key Benefits

Time & Labor Savings
No pilot hole needed — faster installation

Reliable Hold
Designed for strong grip in steel, sheet metal, and alloys

Versatility
Available in various diameters, lengths, coatings, head styles

Cost Efficiency
Reduce extra steps, tool changes, and handling time

Durability & Corrosion Resistance
Available with coatings like zinc, galvanised, or colour finishes

Our Self Drilling Screw Products

Below is an illustrative (or representative) offering from our selection. (Ensure your product listing or plugin dynamically shows actual SKUs.)

Type / Series A

For light gauge steel roofing and trim, corrosion-resistant coating, #3 point

Type / Series B

Heavy-duty variant for thick steel, enhanced drill capabilities

Painted / Coloured Heads

Blends with painted roofs or façades

Specialty Fasteners

Self tapping + sealing washer, countersunk head, low profile

Each screw is engineered for performance, manufactured from high tensile steel, and tested under quality control standards.

Why Buy Your Self Drilling Screws from Boltility?

Direct, Reliable Supplier in Singapore – As a trusted local supplier, we offer shorter lead times, lower freight costs, and responsive service — you won’t wait for overseas shipments.
Quality Assurance & Certifications – All our screws conform to international standards (e.g. ASTM, ISO) and undergo rigorous inspection (tensile, hardness, coating adhesion) to ensure consistency and performance you can trust.
Customization & Value-Added Services
- Custom Sizes / Lengths – match your exact project requirements
- Bulk Orders & Discounts – scale your savings with volume
- Packaging & Logistics Support – tailored delivery, labelling, local distribution
- Technical Support – our engineers help you choose the right fastener for your substrate and load conditions
Competitive Pricing & Transparent Quotations – We provide clear, itemized quotes with no hidden fees. Our pricing is optimized to give you excellent value without compromising quality.
Stellar Customer Service – Fast response, friendly support, after-sales assistance. We back our product with service you can depend on.

Applications & Use Cases

Structural steel framing
Metal roofing, cladding & sidings
Purlins, light gauge steel members
HVAC & ductwork fastening
Signage & façade brackets
Solar panel frames and mounting systems

Include real project photos if available (e.g. roofing, construction sites), with before/after or installation shots.

How to Choose the Right Self Drilling Screw

Material / Thickness: Match the screw’s drilling capacity to your steel gauge
Coating / Corrosion Resistance: Choose galvanised, zinc, or colour coatings depending on environment
Head Type: Hex washer, pan head, countersunk — based on aesthetic, seating, or embedment needs
Length / Embedment: Ensure you penetrate sufficiently into the substrate
OEM or Custom Tolerance: Specify if precision or dimensional tolerances matter

If in doubt, our technical team can recommend the correct specification based on your substrate drawings, environment, and load needs.