4.2mm (No.8) x 50mm Phillips Countersunk Self-Drilling TEK Screw – BZP DIN 7504

Fast, Flush-Finish Fixing Without Pre-Drilling

A self-drilling TEK Screw designed for fast and efficient fixing into thin sheet metal without the need to pre-drill a pilot hole. Its unique drill like tip cuts its own hole as the screw is driven, while the self-tapping thread forms a secure connection in the material.

The countersunk head allows for a flush finish when correctly installed, making this screw a suitable choice where a low-profile, neat finish is required.

Designed with a Phillips drive which allows installation with conventional Phillips screwdriver bits and drivers.

Manufactured from steel with a Bright Zinc Plated (BZP) finish which allows for a mid-level of corrosion resistance, suitable indoor and sheltered external locations.

What are self-drilling screws used for?

These compact self-drilling screws are suitable for use with various material including, thin sheet metal, light-gauge metal components, metal brackets, electrical and engineering components, general maintenance and repair

50mm Self-Drilling TEK Screw Technical Specifications

• Thread diameter (DT): 4.2mm (No.8)
  
• Length: (L) 50mmHead type: Countersunk
  
• Head width (H): 6.8mm
  
• Drive type (DT): Phillips
  
• Type: Self-drilling / TEK
  
• Material: SteelFinish: Bright zinc plated (BZP)
  
• Standard: DIN 7504

Why Choose Self-Drilling Screw?

• Drill like point eliminates the need for separate pilot drilling in suitable materials
  
• Countersunk head provides a neat, flush finish
  
• Phillip’s drive is compatible with widely available screwdriver bits
  
• Bright Zinc Plated finish provides moderate corrosion resistance
• Manufactured from steel for reliable general-purpose fixing
  
• Conforms to DIN 7504

Fusion Fixings Tip

Self-drilling screws can occasionally wander when first started on a smooth metal surface. Where precise positioning is important, creating a small centre-punch indentation before installation can help guide the drill point.

Self-drilling screws frequently asked questions

Do self-drilling screws need a pilot hole?

Normally, no, the drill point is designed to create its own hole in suitable materials, allowing the screw to drill and fasten in a single operation. Self-drilling screws can occasionally wander when first started on a smooth metal surface. If precise positioning is important, creating a small centre-punch indentation before installation can help guide the drill point.

What does the countersunk head do?

The countersunk head allows the screw to sit flush with the surface producing a neater, lower-profile finish.

What does BZP mean and can they be used outside?

BZP means Bright Zinc Plated. The zinc coating provides a mid-level of corrosion resistance making the screw suitable for both indoor and external sheltered applications. For more exposed or slat water environments, stainless steel screws should be used.

What is the difference between a self-drilling and self-tapping screw?

A self-drilling screw has a drill-like point that can create its own hole in suitable materials. A conventional self-tapping screw generally requires a pre-drilled hole before its thread forms the fixing.

Why Buy from Fusion Fixings?

Fusion Fixings supplies a growing range of self-drilling screws in different diameters, lengths, head styles and finishes, allowing customers to select a fixing suited to their specific application. This product is part of the company's range of BZP countersunk self-drilling screws, with multiple sizes available and quantity discounts across the range. 

Read Less