Stainless Steel Self-Drilling Screws

Stainless steel self‑drilling screws combine the durability of stainless steel with the convenience of self‑drilling technology.

These screws eliminate the need for pilot holes, saving time and reducing effort. Available in corrosion‑resistant A2 stainless steel (304), they’re suited for a wide range of applications, from roofing and cladding to HVAC, metal framing, and structural construction.

Why Choose Stainless Steel?

All our self-drilling screws are made from A2 stainless steel (also known as 304). This is the go-to material for general-purpose corrosion resistance, offering a strong balance of durability, weather protection, and value.

  • Rust-resistant – ideal for outdoor and exposed environments
  • Low maintenance – no coatings to chip, peel, or wear off
  • Reliable in wood, metal, and composite materials
  • Non-magnetic – suitable for electrical and sensitive equipment installs

Whether you're fixing metal cladding, frames, or outdoor structures, A2 stainless steel offers long-lasting protection without the risk of rust or surface degradation.

Performance Specs & Standards

DIN 7504K stainless steel self-drilling screws feature a self-drilling point designed to cut through thin metal sheets without the need for a pilot hole.

  • Standard: DIN 7504K - hex head, self-drilling tip for direct fastening into sheet metal
  • Thread type: Metric thread with coarse pitch for strong material grip
  • Common diameters: 4.8mm, 5.5mm, and 6.3mm. Available in various lengths
  • Material: A2 (304) stainless steel for long-lasting corrosion resistance

These screws are suitable for fixing steel sheets, brackets, and cladding materials into metal or timber frameworks, especially in outdoor or damp environments.

Hex Head Self‑Drilling Screws

Hex head self-drilling screws (DIN  7504K) are a popular choice among stainless steel self-drilling fixings due to their strong driving power and ease of installation. The external hex head is designed for use with a standard socket or spanner, making them quick and reliable to fit on site. They're similar to coach screws, which are self-tapping as opposed to self-drilling, and are ideal for securing metal components in construction, fabrication, and general building work.

Where They’re Ideal

These screws are trusted across industries for:

  • Roofing and cladding installations (metal-to-metal or metal-to-wood)
  • HVAC ductwork fastening
  • Metal frame assembly and structural steelwork
  • Outdoor projects
  • Assemblies subject to moisture, vibration, or harsh climates

Pick a drill-point size that exceeds material thickness to avoid tip failure.

Choosing the Right Screw

At Fixabolt, we supply stainless steel DIN 7504K hex head self-drilling screws in the most widely used sizes for trade and construction use, including 4.8mm, 5.5mm, and 6.3mm diameters.

  • 4.8mm – Ideal for lighter gauge metal and general-purpose fixing
  • 5.5mm – A versatile mid-range size suitable for most metal-to-metal applications
  • 6.3mm – A heavier-duty option for higher grip strength in structural work

All of our self-drilling screws are made from A2 stainless steel, which offers reliable corrosion resistance in outdoor or damp conditions, while the hardened drill point cuts through thin steel without pre-drilling.

Choose the right diameter and length based on the material thickness and holding strength required. If you're fixing through thicker sections or need extra bite, the larger diameters provide better performance.

If you're looking for hex head fasteners without a drill point, try our stainless steel hex bolts instead.

Why Fixabolt® Stainless Self‑Drilling Screws?

  • Quality materials: Grade 304 stainless options
  • Standard hex head available, other styles coming soon
  • Reliable UK delivery: Tracked dispatch for trades and DIYers
  • Volume discounts: Bulk buy options to suit every project size

Browse our full range of stainless steel self-drilling screws in stock now — trusted by trades across the UK.

Fixabolt®. No fuss, no guesswork - just reliable, ready-to-use fastening solutions.