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Drilling Class 4 Hex - Fine with Seal

Delivery or Click & Collect

This category from Edcon Steel features high-performance self-drilling screws with a Class 4 galvanised coating—providing a thick, durable layer of corrosion protection perfect for coastal, industrial, or high-exposure settings. They include hardened TEK-style drill points capable of drilling through up to 4.5 mm of mild steel without pre-drilling, and are fitted with a sealing washer—enhancing wind uplift resistance, sealing integrity, and secure load support, making them ideal for metal-to-metal fastening, structural framing, and cladding applications.

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Why Builders, Engineers & Makers Choose Edcon

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Products online, ready to order anytime.

1,800+

Steel profiles, plus stainless, aluminium, brass, bronze & copper.

10,000+

Tools & accessories for cutting, welding & drilling.

50+ years

Supplying Australian projects - big and small.

Family-owned

Trusted and standards-compliant since day one.

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Steel in Action: Projects & Know-How

Edcon and Industry News Edcon Steel delivery trucks parked in front of the Edcon Steel & Metal Centre building, with staff standing beside them.

4 December 2025 / Edcon Team

2025: Year in Review

To celebrate the year that was, we decided to share some of our favourite stories from the past 12 months in our 2025 Year in Review.

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Edcon and Industry News Burrow flap prototype

29 September 2025 / Edcon Team

Saving wombats: the steel burrow flap prototype

We spoke to Ken, a Wollombi Valley Landcare volunteer, about his steel wombat burrow flap prototype, and how Edcon Steel is helping make it a reality.

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Edcon and Industry News Unfit handle

13 October 2025 / Edcon Team

Edcon Steel Launches Uni-Fit Handrail Solutions: Modular, Durable & Compliant

We’re excited to bring you products from Uni-Fit Handrail Solutions, a cutting-edge, fully modular system that lets you replace and build handrails without welding or heavy fabrication.

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Steel and Metal Articles

11 December 2025 / Edcon Team

Steel Angles Explained: Equal vs Unequal, Applications, Benefits & Buying Guide

Learn about equal and unequal steel angles, key applications, benefits & how to buy cut-to-size online with nationwide delivery. | Buy Steel & Metal Online | Edcon Steel

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Our Brookvale store has curated a huge range of steels and metals with you, our customer, in mind.

Brookvale

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Our Revesby store has been an essential steel supply centre to the area for more than 20 years.

Revesby

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Our Blacktown steel store, in Sydney’s west, has been providing metal and steel solutions for over 15 years.

Blacktown

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For car enthusiasts, builders, renovators or rural customers, Bathurst has the best metal and steel supply solutions.

Bathurst

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Our Orange store has a comprehensive range of rural products, stainless steel, brass, bronze, bright mild steel and engineering steels.

Orange

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In the leafy Northern Beaches suburb of Brookvale, north-east of the Sydney CBD, is our Head Office and the birthplace of Edcon Steel.

Brookvale Head Office

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