► ICCONS® | Self Drilling Hex Screws

Drill & Fasten Compatible Steel in One Installation When a screw needs to create its own opening through steel, drill-point capacity matters as much as thread, length & head size. ICCONS® | Self Drilling Hex Screws are designed to drill into compatible mild steel then form their thread as installation...

Drill & Fasten Compatible Steel in One Installation

When a screw needs to create its own opening through steel, drill-point capacity matters as much as thread, length & head size. ICCONS® | Self Drilling Hex Screws are designed to drill into compatible mild steel then form their thread as installation continues, removing the separate pilot-hole stage when the selected fastener is used within its specified capacity. Builders, steel installers, fabricators, cladding crews, building-services contractors & maintenance teams can choose from coarse-thread, fine-thread, 5 Series, sealing-washer & selected longer configurations to suit different steel connections.

Before starting a run of fixings, establish the total material thickness being drilled, required screw length, thread configuration, hex-head size, finish & whether the penetration requires an EPDM sealing washer. For associated fastening hardware browse Bolts & Fasteners, compare Structural Fasteners & Bolts where a conventional structural connection is required or visit Power Tool Accessories for related driving equipment.

► Hardened self-drilling points
► Coarse & fine thread configurations
► 5 Series / Series 500 options
► EPDM sealing-washer variants
► Longer 5 Series configurations
► Zinc, galvanised & stainless options across applicable families
► Painted options for suitable visible installations
► Steel brackets, components, sections & assemblies

What Makes a Hex Screw Self-Drilling?

A self-drilling screw combines drilling & fastening functions within the same fastener.

At the leading end, the hardened point cuts through compatible steel. Once the point creates the required opening, the threaded section follows & forms into the material.

This allows applicable ICCONS screws to be installed without a separate pilot-drilling operation when the material falls within the specified capacity of the exact fastener.

Three areas deserve attention before installation:

► Drill point – needs sufficient capacity for the material being penetrated
► Thread – needs to suit the connection & material range
► Hex head – needs a correctly sized driving accessory

A screw can have the correct overall length but still be unsuitable if its drill point cannot handle the material thickness.

Let the Material Stack Determine the Drill Point

The total thickness at the fastening position is more useful than simply describing the job as steel-to-steel.

A thin bracket attached to steel creates a different drilling requirement from a heavier fabricated assembly.

Steel Connection

Configuration to Consider

Main Check

Lighter compatible steel

Coarse Thread Hex

Material thickness

Connection needing greater installation control

Fine Thread Hex

Thickness & thread requirement

Thicker mild steel

5 Series Fine Thread

Drill-point capacity

Penetration requiring sealing

Hex with EPDM Washer

Material & sealing requirement

Thicker steel with sealing requirement

5 Series with EPDM Washer

Capacity & washer requirement

Connection requiring additional screw length

5 Series Long Screw

Length, thickness & thread engagement

Check the drilling capacity for the exact screw rather than applying one thickness limit to the complete range.

Coarse Thread for Repetitive Steel Fastening

ICCONS' coarse-thread self-drilling Hex family is designed for fastening through compatible mild steel in metal brackets, components, steel sections & assemblies.

The coarse-thread configuration provides slightly faster installation than its fine-thread counterpart.

Applications can include:

► Steel brackets to sections
► Fabricated steel components
► General metal assemblies
► Construction brackets
► Light steel connections within the specified capacity

The range includes different gauges, lengths, head sizes & finishes.

For conventional hardware used alongside steel assemblies, browse Nuts & Washers.

Confirm material thickness, gauge, length & drilling capacity before beginning repetitive installation.

Fine Thread for More Controlled Installation

Fine-thread self-drilling Hex screws address a different installation requirement.

ICCONS describes its fine-thread configuration as providing a slightly slower, more controlled installation than the coarse-thread version, giving the installer greater adjustment capability.

Fine thread can be useful where:

► Component positioning needs attention
► Steel sections require controlled seating
► Bracket alignment needs to be maintained
► Material thickness suits the selected fine-thread screw
► The connection calls for a fine-thread configuration

Choose the thread configuration according to the materials & connection being assembled.

For further practical fastening guidance, read Why Good Fasteners Matter More Than the Tool You Drive Them With.

5 Series for Thicker Mild Steel

As steel thickness increases, the drilling point becomes a critical part of fastener selection.

ICCONS' 5 Series, also known as Series 500, uses a hardened 5 Series drill point with a fine-thread configuration.

Applicable ICCONS 5 Series products are specified for drilling through 3–12 mm mild steel.

This family can suit:

► Heavier steel brackets
► Thicker steel sections
► Fabricated assemblies
► Steel components requiring increased drilling capacity
► Construction connections within the specified material range

The family includes different lengths & finishes across applicable configurations.

Confirm the capacity of the exact screw before installation rather than treating 12 mm as a universal limit across every self-drilling fastener.

Longer 5 Series Screws Provide Additional Reach

Some steel connections need 5 Series drilling capability together with greater overall fastener length.

ICCONS offers 5 Series Long Screw – Fine Thread configurations for applicable installations.

Longer screws can become relevant where:

► An assembly has greater overall depth
► Components create additional stand-off
► The fixing passes through attached material before reaching supporting steel
► Additional fastener length is specified for the connection

Screw length & drilling capacity are separate considerations.

Additional length does not increase the amount of steel the drill point is designed to penetrate.

EPDM Washers Add a Sealing Element

Where a fixing penetration requires sealing, ICCONS offers self-drilling Hex configurations fitted with EPDM sealing washers.

Washered versions are available across applicable:

► Coarse-thread configurations
► Fine-thread configurations
► 5 Series fine-thread configurations

These variants can suit compatible steel assemblies where sealing around the fixing penetration is required.

Before choosing a washered screw, establish:

► Steel thickness
► Drill-point capacity
► Screw length
► Required thread
► Finish
► Exposure conditions
► Whether an EPDM seal is specified

The washer provides a sealing element around the penetration while the screw still needs to be correctly selected for the steel connection beneath it.

Steel Brackets Can Increase the Actual Drilling Thickness

A bracket connection can involve more material than the supporting steel alone.

For example, the screw may need to pass through the bracket before drilling into the section behind it.

Check:

► Bracket thickness
► Supporting steel thickness
► Complete material stack at the drilling point
► Screw drilling capacity
► Required thread engagement
► Screw length
► Available head clearance

Where the connection requires conventional bolted fastening rather than a self-drilling screw, browse Hex Bolts.

Assess the materials at the complete fastening position before selecting the screw.

Fabrication Work Can Require Several Screw Configurations

Workshop fabrication can move between lighter brackets, thicker sections, exposed components & assemblies requiring different screw lengths.

Separating self-drilling screws by function can make selection clearer:

► Coarse thread for compatible faster-install applications
► Fine thread where more controlled installation is useful
► 5 Series for specified thicker mild steel
► Washered configurations where sealing is required
► Longer configurations where assembly depth requires additional reach

Clearly identifying gauge, length, thread & drill-point family also helps distinguish fasteners that may appear similar in the box.

External Steel Work Requires the Correct Finish

Drilling capacity is only one consideration for exposed steel connections.

ICCONS documents different corrosion-protection options across applicable self-drilling Hex families, including zinc, galvanised & stainless configurations.

Painted coarse-thread versions are also available for suitable installations where the visible fixing needs to coordinate with surrounding material.

For exposed work, consider:

► Environmental conditions
► Connected materials
► Required corrosion protection
► Project specification
► Whether the fastener remains visible
► Whether sealing is required

Select the fastener finish according to the materials, exposure conditions & requirements of the installation.

Match the Driving Accessory to the Hex Head

A correctly selected screw also requires positive engagement with the driving accessory.

ICCONS self-drilling Hex families include applicable ¼", 5/16" & ⅜" hex-head configurations.

Before beginning repetitive work:

► Confirm the head size
► Match the nut setter
► Check the driving accessory for wear
► Seat it fully over the head
► Keep the driver aligned with the screw
► Replace accessories that no longer engage positively

For related driving equipment, browse Drill Accessories.

Keeping the correct nut setter with each screw size can help when several head configurations are being used across the same project.

Self-Drilling Screws Still Have Defined Material Limits

The self-drilling point is designed to operate within a specified material range.

If a selected screw is intended for lighter material, additional driver pressure does not increase its drilling capacity.

Stop & check the setup if you encounter:

► Repeated failure to penetrate known material
► Excessive time before breakthrough
► Damaged drill points
► Screw wandering during starting
► Poor thread formation
► Driving accessory slipping from the hex head

Confirm the material thickness, fastener specification & driver setup before continuing.

Construction Crews Need Consistency Across Repeated Connections

Large runs of steel fixings can magnify a small selection error.

Before the first screw goes in, establish:

► Fastener family
► Gauge & length
► Drill-point capacity
► Thread configuration
► Hex-head size
► Finish
► Washer requirement
► Driver & nut setter

Once these details are confirmed, keep the specified setup consistent across equivalent connections.

For a broader overview of common construction fixings, read the Fastener Guide Bolts Screws Anchors.

Where ICCONS® Self Drilling Hex Screws Are Used?

Steel Construction

Steel brackets, sections & components can be fastened without a separate pilot hole where the selected screw is suitable for the material thickness.

Workshop Fabrication

Fabricators can encounter different steel gauges within one assembly. Checking drill-point capacity helps match the screw to each connection.

Cladding & External Installations

Applicable washered, coated, stainless & painted configurations provide options where exposure, appearance or sealing also forms part of the fixing requirement.

Building Services

Steel brackets & supports used around electrical, plumbing or mechanical installations may suit self-drilling fastening where the connection falls within the specified capacity.

Maintenance & Replacement

Replacement work should begin by identifying the existing material thickness, screw dimensions, finish, head size & whether a sealing washer forms part of the assembly.

Practical Checks Before Starting a Run

► Measure the material stack. Include every steel layer the drill point needs to penetrate.
► Check drilling capacity. Use the specification for the exact screw.
► Separate standard & 5 Series stock. Similar-looking screws can have different drilling capabilities.
► Choose coarse or fine thread deliberately. Match the configuration to the connection.
► Confirm length separately. A longer screw does not automatically drill thicker steel
► Check whether sealing is required. Select an EPDM washered configuration where specified.
► Match the nut setter to the head. Confirm ¼", 5/16" or ⅜" where applicable.
► Keep the driver square. Alignment supports accurate starting & secure head engagement.
► Inspect drill points during repetitive work. Remove damaged fasteners rather than forcing them through the connection.
► Confirm the finish. Exposure conditions can change which fastener configuration is suitable.

For crews preparing fasteners, tools & consumables ahead of larger projects, Spring Jobsite Prep Getting Your Gear Ready provides additional preparation guidance.

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Why Buy ICCONS® Self Drilling Hex Screws From Industrial Shed?

Industrial Shed supplies self-drilling fasteners, driving accessories & associated trade equipment for builders, steel installers, fabricators, building-services contractors & maintenance teams.

For crews managing recurring fastening requirements across projects, Trade support Solutions provides a dedicated trade pathway.

When you need help confirming equipment for your fastening setup, Call us at to speak with the Industrial Shed team.

Set the Fastener Up for the Steel in Front of You

Successful self-drilling installation depends on matching the drill point, thread, length, finish & head configuration to the materials being joined.

Measure the complete material stack, confirm the drilling capacity, select the required thread & washer configuration then match the hex head with the correct driving accessory.

Choose ICCONS Self Drilling Hex Screws for compatible steel connections where drilling & fastening need to be completed efficiently with the correct fastener for the material.

Frequently Asked Questions

The hardened drill point cuts through compatible mild steel within its specified capacity. The threaded section then follows & forms into the material as installation continues.

The 5 Series, also known as Series 500, provides increased drilling capacity for applicable thicker-steel connections. Applicable ICCONS 5 Series screws are specified for drilling through 3–12 mm mild steel.

Yes. Consider the complete material stack the drill point needs to penetrate at the fastening position, including brackets, plates or other steel layers.

ICCONS describes fine thread as providing a slightly slower, more controlled installation with greater adjustment capability while coarse thread provides slightly faster installation. Select according to the connection & exact screw specification.

Not necessarily. Overall screw length & drill-point capacity are separate specifications. Check both for the connection.

Use a washered configuration where the installation requires a sealing element around the fixing penetration. The screw still needs suitable drilling capacity, dimensions & finish for the connection.

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