► ICCONS® | Self Drilling Washered Hex Screws

Faster Sealed Fixing into Steel Without Pre-Drilling Need to fasten into steel while creating a sealed fixing point without adding a separate pre-drilling step? ICCONS® | Self Drilling Washered Hex Screws combine a hardened self-drilling point, positive hex drive & EPDM sealing washer across configurations designed for steel brackets, metal...

Faster Sealed Fixing into Steel Without Pre-Drilling

Need to fasten into steel while creating a sealed fixing point without adding a separate pre-drilling step? ICCONS® | Self Drilling Washered Hex Screws combine a hardened self-drilling point, positive hex drive & EPDM sealing washer across configurations designed for steel brackets, metal components, steel sections, assemblies, roofing & other applications where the fixing must drill, tap & secure within its documented capacity.

The steel thickness should drive the buying decision before screw length does. ICCONS offers coarse & fine-thread self-drilling washered screws for everyday steel connections, 5 Series / Series 500 configurations for thicker mild steel, Top Grip options for metal roofing & longer variants where additional screw length is required. Depending on the product, documented drilling capacities extend from light-gauge steel through to 12 mm mild steel.

Buyers assembling the complete fastening setup can pair the selected screws with Impact Drivers, correctly sized Drill Accessories & related Specialty Fasteners & Fixings for steel fabrication, construction & installation work.

What Are ICCONS® Self Drilling Washered Hex Screws?

These fasteners are designed to create their own drilling path through compatible steel while providing a sealing washer beneath the hex head. The hardened self-drilling or tek point drills through the material within the screw's specified capacity, while the thread forms engagement in the supporting steel.

Across relevant ICCONS configurations, an EPDM sealing washer sits beneath the head where a rubber seal is required at the fixing point.

The wider family includes:

► Self Drilling Hex with Sealing Washer – Coarse Thread
► Self Drilling Hex with Sealing Washer – Fine Thread
► Self Drilling Hex 5 Series with Sealing Washer – Fine Thread
► Self Drilling Hex 5 Series Long Screw with Sealing Washer – Fine Thread
► Self Drilling Hex Top Grip with Sealing Washer – Coarse Thread
► Painted Self Drilling Top Grip configurations
► Trade Pack & Trade Tub configurations across applicable sizes

Each family addresses a different combination of steel thickness, installation behaviour, required length & end use. This makes drill-point capacity, thread form & material thickness more useful selection criteria than simply choosing a screw that appears to have the right diameter.

Why Choose ICCONS® Self Drilling Washered Hex Screws?

Removing a separate drilling operation can make repetitive steel fastening substantially more efficient. Within their documented material capacities, ICCONS self-drilling screws use a hardened point to drill into the steel & form the required thread without a separate pilot hole.

That combination is particularly useful where crews are installing repeated brackets, sheet-metal components, steel sections or roof sheets & need consistent fastening without repeatedly changing between drill bits & screws.

Built-In EPDM Sealing Washer

Connections exposed to moisture or requiring a rubber seal need consideration at the surface as well as within the steel. Applicable ICCONS self-drilling washered screws incorporate an EPDM sealing washer beneath the hex head.

The washer should seat correctly against the attached material. Excessive driving can unnecessarily distort the EPDM component, while insufficient seating may prevent the fixing from achieving its intended clamping condition.

Coarse Thread for Faster Installation

High-volume steel fixing can make installation speed an important purchasing consideration. ICCONS coarse-thread Self Drilling Hex with Sealing Washer products are designed for fast installation across compatible mild-steel applications.

Documented examples include:

► 8-18 × 12 mm with ¼" hex head for applicable 0.75–2.50 mm steel
► 10-16 × 16 mm with 5/16" hex head for applicable 0.75–3.50 mm steel
► Selected larger configurations for steel capacities extending to approximately 5 mm, depending on the individual product

The selected screw's stated drilling capacity should always be checked before repetitive installation begins.

Fine Thread for Greater Installation Control

Some steel connections benefit from a more controlled driving characteristic rather than maximum installation speed. ICCONS fine-thread washered self-drillers provide that alternative.

Documented fine-thread configurations include 10-24, 12-24 & 14-20 screws, with individual products covering different material-thickness ranges & lengths.

This distinction allows buyers to select the thread according to the steel connection instead of treating coarse & fine-thread products as interchangeable.

For further practical guidance on selecting fasteners around the actual connection, Why Good Fasteners Matter More Than the Tool You Drive Them With provides useful trade-focused reading.

5 Series for Heavier Steel

Applicable 12-24 5 Series products are documented for fastening through 3–12 mm mild steel, combining a 5 Series drilling point, fine thread, flanged hex head & EPDM sealing washer.

Available lengths across the standard family include 32, 38, 50, 65 & 85 mm, with longer specialised configurations also available.Once mild-steel thickness moves beyond the capacity of a standard self-driller, the drill point becomes the critical specification. ICCONS 5 Series / Series 500 washered screws are designed for thicker steel applications.

Common Applications

Steel Bracket Installation

Fabricated brackets often need to be attached without introducing another drilling operation into repetitive assembly work. Standard coarse or fine-thread self-drilling washered screws can suit compatible steel brackets where the material thickness falls within the selected screw's drilling capacity & a rubber seal is required.

For connections requiring different mechanical fastening methods elsewhere in the assembly, Bolts & Fasteners provides complementary options.

Metal Component Assembly

Fabrication work frequently brings together sheet, formed components & steel sections of different thicknesses. Selecting the self-driller from the thickest material being penetrated helps establish whether a standard point or 5 Series configuration is appropriate.

This is particularly important when a workshop produces several assemblies that look similar but use different material gauges.

Steel Sections & Fabricated Assemblies

Heavier steel changes the drilling requirement before it changes the appearance of the finished connection. Where mild steel reaches the documented 3–12 mm range, applicable ICCONS 5 Series washered screws provide a purpose-designed alternative to standard self-drilling points.

Fabricators should confirm the actual material thickness rather than estimating it from the section's overall dimensions.

Metal Roofing to Steel Purlins

Roof-sheet fastening introduces sheet control as well as steel penetration. ICCONS Self Drilling Hex Top Grip with Sealing Washer is designed for fastening metal roof sheets to metal battens, steel purlins & other suitable steel substrates.

Applicable Top Grip configurations use a self-drilling point for steel up to 4.5 mm, an EPDM sealing washer & upper-shank protection designed to remove burrs that could affect the washer while helping protect the coating on the upper thread.

Shed & Steel-Building Installation

Steel sheds can involve roofing, wall components, brackets, flashings & fabricated connections within the same build. Different parts of the structure may require different self-drilling screw capacities even when all connections involve steel.

Separate roofing-specific Top Grip requirements from general bracket or assembly fastening rather than using one screw configuration throughout the project.

Workshop Fabrication

Repeatability matters when a workshop is producing multiple frames, enclosures, equipment assemblies or sheet-metal components. Keeping screw families organised by drilling capacity, thread & hex size helps operators select the intended fastener without repeatedly checking mixed stock.

Maintenance & Replacement Work

Existing steel assemblies often need replacement fasteners after panels, covers or components have been removed for servicing. Before replacing the original screw, check the steel thickness, existing hole condition, required washer, screw diameter & environment.

A replacement that merely fits through the existing hole may not reproduce the intended thread engagement or sealing arrangement.

Product Selection Guide

Start with what the screw must drill through, then work outward to thread, length, washer & driver. This order prevents a common purchasing mistake: choosing a convenient screw length before confirming that its point can penetrate the supporting steel.

Steel-Fixing Requirement

Suitable ICCONS® Family

Main Buying Check

Installation Character

Light-gauge steel assembly

Coarse Thread Washered Hex

Exact drilling capacity

Faster installation

Controlled general steel fixing

Fine Thread Washered Hex

Steel thickness & thread

More controlled driving

3–12 mm mild steel

5 Series / Series 500

5 Series capacity

Heavy-steel drilling

Thick assembly requiring extra reach

5 Series Long Screw

Capacity plus required length

Longer fixing reach

Roof sheet to steel

Top Grip Washered Hex

Purlin thickness & sheet

Roofing-specific sheet control

Visible roofing installation

Painted Top Grip

Technical screw first, colour second

Finished exposed fixing

Repetitive site or workshop use

Trade Pack / Trade Tub

Correct underlying screw

Convenient quantity format

Measure the Steel Before Choosing the Screw

Material thickness is the quickest way to eliminate unsuitable self-drilling configurations. An 8-gauge coarse-thread product intended for lighter steel should not be expected to perform the drilling work of a 5 Series screw designed for substantially thicker mild steel.

Where steel thickness is uncertain, measure or confirm the section specification before ordering.

Decide Whether Speed or Control Matters More

Coarse & fine threads give buyers another way to match installation behaviour to the job. ICCONS describes its coarse-thread washered hex screws as having faster installation characteristics, while the fine-thread family provides a slower, more controlled installation.

Neither description removes the need to confirm drilling capacity.

Move to 5 Series When the Steel Requires It?

Increasing screw length will not turn a standard drilling point into a heavy-steel drilling point. For applicable mild steel between 3 & 12 mm, review the 5 Series / Series 500 range rather than selecting a longer standard self-driller.

That distinction is particularly important for fabricators ordering screws for mixed steel sections.

Use Top Grip Where the Application Is Roofing?

Roof sheet requires different consideration from a bracket or fabricated component. ICCONS Top Grip washered screws incorporate features intended for applicable steel-roofing installation, including upper-shank protection & a Top Grip thread arrangement.

For broader guidance across screws, bolts & anchors, the Fastener Guide Bolts Screws Anchors can help purchasing teams distinguish between common fastening families.

Match the Hex Head Before Work Starts

The driver accessory should be confirmed when the fastener is ordered—not after cartons reach the work area. ICCONS self-drilling washered hex products use different head sizes across the range, including ¼", 5/16" & 3/8" hex heads.

Matching the nut setter correctly helps maintain positive engagement during repetitive installation.

Check Finish Against Exposure

Workshop assemblies & exterior steelwork can place very different demands on the fastener finish. Applicable ICCONS products are available in zinc, Class 4 galvanised & selected stainless configurations depending on the individual screw family.

Choose the finish from the actual installation environment rather than assuming every washered self-driller has the same exposure suitability.

Expert Tips

Mark Steel Thickness on Fabrication Drawings

A simple thickness note can prevent the wrong self-driller reaching an otherwise straightforward connection. Where several steel gauges are used across an assembly, include the relevant material thickness with the fixing callout.

Keep Standard & 5 Series Screws Physically Separate

Similar-looking screws can have very different drilling capabilities. Store standard self-drillers & 5 Series products in separate labelled locations so operators don't select them by length alone.

Small Parts Organisers can help separate frequently used fasteners, nut setters & smaller installation accessories.

Let the Drill Point Work

Excessive force is not a substitute for the correct drilling capacity. Keep the driver aligned, allow the self-drilling point to establish its cutting action & investigate if penetration is consistently difficult.

Persistent drilling problems can indicate excessive material thickness, a worn or unsuitable fastener, poor alignment or an incorrect screw selection.

Watch for the Transition From Drilling to Thread Engagement

A self-driller performs two different jobs during the same installation. Once the point penetrates the steel, the screw must transition into thread engagement & final seating without uncontrolled over-driving.

This is where appropriate driver control becomes particularly valuable.

Check EPDM Washer Condition Before Installation

A damaged washer defeats part of the reason for selecting a washered screw. Reject fasteners with missing, displaced or visibly damaged sealing washers before they enter repetitive installation.

Don't Use Length as a Drilling-Capacity Shortcut

Longer screws are selected for reach—not automatically for thicker steel. Compare the actual drilling capacity in the product specification before assuming a longer screw can penetrate a heavier section.

Keep the Correct Nut Setter With Each Screw Family

Changing between ¼", 5/16" & 3/8" hex heads can interrupt repetitive work & encourage incorrect driver use. Organise matching nut setters alongside commonly used screw sizes where practical.

Review Swarf & Finished Surfaces

Self-drilling creates metal debris as the point penetrates steel. Remove swarf from finished roofing, painted panels & sensitive assemblies instead of allowing loose particles to remain after installation.

For workshops & site crews preparing tools for sustained workloads, Winter-Proofing Your Tools: Maintenance Tips for the Cold Months provides practical equipment-maintenance guidance.

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

Fast-moving steel work is easier to supply when the order is based on measurable connection details. Industrial Shed supports fabricators, builders, shed installers, roofers, maintenance crews, mechanical contractors & trade purchasing teams sourcing ICCONS fastening products for workshop & site applications.

Steel thickness is particularly useful when several similar self-drilling products are being compared. Buyers can also identify the required thread, screw length, hex size, washer, finish & manufacturer product code to reduce uncertainty when ordering repeat quantities.

For active workshop or construction requirements, on-site & workshop Services supports businesses managing tools & consumables around ongoing work.

Where a fastener needs to be confirmed before purchase, Contact Us with the steel thickness, required screw dimensions, application & ICCONS product code where available.

Start With the Steel Thickness & Finish With the Right Fixing

A self-drilling screw earns its place in the workflow by removing unnecessary preparation while still matching the connection. Confirm what the point must penetrate, decide whether coarse, fine, 5 Series or Top Grip suits the job & then select the required length, washer, finish & hex drive.

That approach keeps purchasing tied to the actual steel rather than to visual similarities between fasteners. From fabrication benches & steel assemblies to purlins & external sheet-metal work, the right ICCONS configuration gives crews a more predictable path from first contact to final seating.

Choose ICCONS® Self Drilling Washered Hex Screws by steel thickness, drilling capacity, thread, application, screw length, EPDM washer, finish & hex-drive requirement.

Frequently Asked Questions

Capacity depends on the exact screw. Standard coarse & fine-thread products cover different light-to-medium steel ranges, while applicable 5 Series / Series 500 products are documented for 3–12 mm mild steel. Check the individual product specification before installation.

Use a 5 Series configuration when the supporting mild steel requires the greater drilling capacity of the Series 500 point. Do not attempt to compensate for insufficient drilling capacity by simply selecting a longer standard screw.

ICCONS coarse-thread products provide faster installation characteristics, while fine-thread configurations offer a slower, more controlled installation. The correct choice must also suit the steel thickness & intended connection.

Top Grip washered screws are specifically suited to applications such as metal roof sheet to metal battens, steel purlins & other appropriate steel substrates. General brackets & steel assemblies may be better matched to standard coarse, fine or 5 Series washered hex products.

Within the documented self-drilling capacity of the selected screw, the hardened drilling point is designed to drill & tap without a separate pre-drilled hole. If the material exceeds that capacity, select an appropriate fastening method rather than forcing the screw.

Check the individual screw specification. The wider ICCONS range includes ¼", 5/16" & 3/8" hex heads, so there is no single nut-setter size for every Self Drilling Washered Hex Screw.

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