8g (4.20mm) Zinc Yellow Hex Flange (1/4″) Coarse Metal Self-Drilling Screws

The 8g (4.20mm) Zinc Yellow Hex Flange Coarse Metal Self Drilling Screws are engineered for high-strength fastening in metal applications without the need for pre-drilling. Featuring a self-drilling point and coarse threads, these screws ensure rapid installation and a secure hold. The zinc yellow coating offers added corrosion resistance, making it suitable for both indoor and outdoor use.

Product Features

Self-Drilling Point

Eliminates the need for pilot holes, enabling fast and efficient installation directly into metal.

Hex Flange Head Design

Provides greater torque transfer and distributes load evenly for a secure fit.

Corrosion-Resistant Finish

Zinc yellow coating enhances durability and protects against rust.

Coarse Thread Profile

Optimized for a strong grip in metal substrates.

Product Specifications

• System of MeasurementScrew Gauge
• ProductSelf Drilling Metal Screw
• Head Type Hex Flange Head
• Size8g (4.20mm)
• Thread Pitch18 TPI
• Thread DirectionRight Hand
• Thread TypeCoarse
• Corrosion Protection LevelModerate
• Class Grade Class 2
• MaterialHardened Steel
• FinishZinc Yellow
• NEO Sealing Washer No
• Product Diameter (d)4.00 – 4.20mm
• Head Diameter (a)9.70 – 10.00mm
• Screw Length (l)Length measurement is from under the head to end of drill point
• Head Height (h)4.00mm
• Min to Max Steel Thickness 0.75 – 2.50mm
• Drive Size (as)1/4″
• Drive TypeHex
• Screw Point Drill Point
• Closest size in mm: 4.20 mm
• Closest size in imperial 0.17“
• Standard Made To AS3566
• BrandHobson Engineering
• Alternative Brands Tower | Bremick Fasteners