Certified High-Strength Fastening for Structural Steelwork

A structural connection deserves more than a bolt that simply fits through the hole. Bremick Structural Assembly Bolts provide matched bolt, nut & washer assemblies for structural steel fabrication, commercial construction, industrial structures, infrastructure & engineered steel connections where fastener class, finish, traceability & installation requirements all matter.

Bremick's K0 Class 8.8 structural bolt assemblies combine high-strength metric fastening with hot-dip galvanised protection & manufacturer-backed identification. For Australian steelwork, the K0 range is supported by compliance documentation to AS/NZS 1252.1:2016 & AS/NZS 1252.2:2016, helping fabricators, steel erectors, builders & project teams keep specified structural hardware tied to its certification.

Need related structural hardware around the same project? Structural Fasteners & Bolts covers the broader heavy-duty fastening range, while Bolts & Fasteners provides additional threaded fastening options.

Before the first assembly reaches site, confirm the drawing, bolt diameter, length, Class 8.8 requirement, finish, connection detail, tensioning method & certification.

What Are Bremick Structural Assembly Bolts?

Structural bolt assemblies bring the main bolted-connection components together as a matched fastening system.

A typical assembly includes:

► Structural bolt
► Compatible structural nut
► Compatible washer

That sounds straightforward until the joint becomes part of engineered steelwork.

At that point, the assembly has to satisfy more than diameter & length. Property class, component compatibility, coating, traceability, installation procedure & the nominated structural specification can all matter.

Bremick's K0 range is designed around high-strength structural bolted connections using Class 8.8 fasteners in metric sizes.

The practical buying principle is simple:

Treat the bolt, nut & washer as one structural assembly rather than three unrelated pieces of hardware.

Why Choose Bremick K0 Structural Assemblies?

Class 8.8 High-Strength Fastening

Structural steel connections can carry considerably greater demands than general workshop fastening.

Bremick K0 assemblies use Class 8.8 structural bolts, providing a defined high-strength metric fastening system for appropriate engineered connections.

Class 8.8 is part of the specification.

It shouldn't be replaced by another bolt simply because the thread & length appear similar.

For related high-strength fastening outside dedicated structural assemblies, Bremick High Tensile Bolts provides another useful pathway.

Hot-Dip Galvanised Protection

Bremick K0 structural assemblies are supplied hot-dip galvanised.

That finish is relevant across exposed structural steelwork where the project calls for galvanised structural fasteners.

Coating still needs to be considered alongside:

► Steelwork finish
► Exposure conditions
► Project specification
► Connected materials
► Installation procedure
► Any repair requirements after coating damage

Don't substitute finish based on appearance alone.

Bolt, Nut & Washer Supplied as an Assembly

A structural connection isn't the place to create a bolt set from whatever loose hardware is nearby.

Matched assemblies help keep the major fastening components associated with the intended structural system.

Where nuts are required elsewhere on the job, Hex Nuts covers general-purpose complementary hardware without confusing it with the specified K0 assembly.

Traceability Beyond the Box

Once structural bolts leave their packaging, labels can disappear surprisingly quickly.

Bremick's current K0 system includes unique head marking linked to manufacturing & batch information.

That provides a practical way to retain identification after the assembly is separated from the original carton.

Certification Access

Project teams often need more than a delivery docket.

Bremick provides access to K0 structural assembly certificates using identifying information associated with the bolt or packaging.

For QA, fabrication records & project documentation, that can make it easier to connect installed hardware with supporting certification.

AS/NZS 1252 Structural Bolt Assemblies

AS/NZS 1252.1:2016

Bremick identifies its K0 structural assemblies as manufactured in compliance with AS/NZS 1252.1:2016.

For buyers, fabricators & site teams, that makes the applicable standard part of the product identification rather than an optional extra.

If the drawing calls for a particular structural assembly standard, order from that requirement.

AS/NZS 1252.2:2016

Bremick's K0 documentation also references AS/NZS 1252.2:2016 as part of its conformity requirements.

Keep Part 1 & Part 2 together when checking the current K0 structural assembly documentation.

A generic description such as “high tensile bolt” isn't enough where a specified structural assembly is required.

K0 Structural Assembly

“K0” appears repeatedly across Australian structural bolt supply because it identifies a particular assembly system within AS/NZS 1252 structural bolting.

For Bremick buyers, the useful identifiers include:

► K0 designation
► Class 8.8
► Structural assembly
► Hot-dip galvanised finish
► Metric size
► Applicable AS/NZS 1252 references
► Bolt head identification
► Batch & heat information
► Supporting certification

Keep those details attached to the purchasing record rather than reducing the order to “M20 galvanised bolts”.

Where Structural Assembly Bolts Are Used?

Structural Steel Fabrication

Fabricators need the fastener schedule to agree with the drawings before steel reaches site.

Bremick structural bolt assemblies can be relevant across compatible:

► Beam connections
► Column connections
► Cleats
► Plates
► Brackets
► Frames
► Fabricated structural members

Connection design determines the assembly.

The bolt supplier doesn't replace the engineer.

Commercial Construction

Warehouses, industrial buildings & commercial steel structures can contain hundreds or thousands of structural bolted connections.

Consistency becomes especially important at that scale.

Separating structural assemblies by diameter, length, batch & project zone can make site handling far easier than opening mixed cartons beside the steel.

Industrial Structures

Platforms, access structures, equipment supports & plant steelwork can involve engineered bolted connections where structural hardware needs to remain identifiable.

The more complex the installation, the more valuable organised fastener records become.

Infrastructure Steelwork

Bridges, transport structures, utilities & other infrastructure projects can impose detailed documentation & installation requirements.

Use the structural assembly specifically nominated by the project documents.

Steel Erection

The erection crew shouldn't have to decide what bolt grade belongs in the joint.

That work should already have been resolved through drawings, procurement & fastener scheduling.

Site selection then becomes a matter of matching the labelled assembly to the specified connection.

Plant Upgrades & Shutdown Work

Existing industrial structures create their own challenge: old bolts may no longer provide reliable identification.

Before replacing structural hardware during upgrades, determine what the engineered repair or modification requires rather than copying an unidentified fastener.

Industrial crews maintaining crushers, conveyors & heavy equipment may also find Quarry Crews Crusher Maintenance useful when planning maintenance around critical bolted equipment.

Choosing the Correct Structural Bolt Assembly

Start With the Drawing

Don't begin at the fastener shelf.

Begin with the structural detail.

Confirm:

► Assembly type
► Bolt diameter
► Bolt length
► Required property class
► Finish
► Hole arrangement
► Number of bolts
► Washer arrangement
► Tensioning requirement
► Applicable standard

The drawing is far more valuable than an old bolt used as a sample.

Confirm Bolt Diameter

Bremick structural assembly ranges cover several metric diameters.

Current structural families include commonly specified sizes such as:

► M12
► M16
► M20
► M24
► M30
► M36

Availability & dimensional range vary by product family.

The nominated diameter needs to match the connection design.

Choose Length From the Complete Grip

Bolt length needs to account for everything the assembly passes through.

Consider:

► Connected plate thickness
► Structural member thickness
► Washer arrangement
► Nut engagement
► Connection geometry
► Specified thread projection

Don't solve an incorrectly selected bolt length by casually stacking extra washers.

Check Thread Pitch

Metric structural bolts use defined metric thread configurations.

Two bolts with the same nominal diameter can still differ in specification.

Keep pitch & product identification with the assembly data rather than ordering only from nominal diameter.

Verify Property Class

Bremick K0 structural assemblies use Class 8.8 fasteners.

Property class influences mechanical performance.

An M20 bolt of another class isn't automatically an acceptable substitute merely because it enters the same hole.

Confirm the Finish

The current Bremick K0 structural assembly range uses hot-dip galvanised fasteners.

Check the specified coating rather than assuming any galvanised-looking bolt is equivalent.

Verify Bolt, Nut & Washer Compatibility

Structural hardware should be considered as a system.

The bolt receives most of the attention, but the nut & washer remain part of the installed connection.

Where general washers are needed elsewhere on a steelwork project, Flat Washers provides a separate category for non-assembly requirements.

Keep the Correct Assembly Together

Loose components have a habit of migrating between boxes.

Avoid mixing structural bolts, nuts or washers from unrelated assemblies without confirming the applicable structural system & project requirements.

Good site organisation is part of good fastening practice.

K0 Structural Bolt Identification & Traceability

Check the Head Marking

Bremick's K0 system uses markings on the bolt head to support product identification & traceability.

Before installation, make sure the markings are legible where project QA requires them.

Keep Packaging Information

Carton information can contain useful identifiers associated with:

► Product code
► Size
► Batch
► Bolt heat
► Nut heat
► Job number
► Certification

Don't discard all packaging before the project documentation has captured what it needs.

Match Certificates to the Correct Product

Certification only helps if it belongs to the hardware being installed.

Check the relevant identifying information rather than filing a generic certificate against every structural bolt on site.

Record Batch Information Where Required

Large projects can benefit from recording where individual fastener batches were installed.

The level of documentation depends on the project QA plan, but losing traceability unnecessarily makes later investigation harder.

Structural Assembly Bolt vs Standard Hex Bolt

They may both have hex heads.

That doesn't make them equivalent.

For conventional hex-head fastening outside structural assemblies, Hex Bolts provides the appropriate broader category.

Structural Bolts vs Stud Bolts

A structural bolt assembly isn't the only high-strength threaded connection encountered around heavy industry.

Stud bolts use a different configuration & can appear around flanges, machinery & industrial equipment.

If the project requires threaded studs rather than headed structural assemblies, Stud Bolts provides that separate fastening family.

Choose by connection design rather than strength alone.

Structural Bolt Installation

Keep Threads Clean

Dirt, damaged threads, contamination & uncontrolled coatings can influence assembly behaviour.

Protect structural assemblies before installation & inspect visibly damaged components before use.

Don't Rely on a Generic Torque Number

Structural bolt tensioning deserves more care than “tighten it until the gun stops”.

Bremick's K0 guidance references structural tensioning procedures used in Australian steelwork, including part-turn & Direct Tension Indicator methods where specified.

Use the installation procedure nominated for the project.

Why Torque Alone Can Be Misleading

Torque depends heavily on friction.

Surface condition, coatings, lubrication & thread behaviour can change how much of the applied torque actually becomes bolt tension.

That is why structural installation procedures shouldn't be replaced with an arbitrary torque figure pulled from another job.

Check Washer Position

Washer placement needs to follow the specified bolting arrangement.

Don't move or add washers simply because it makes the connection easier to assemble.

Inspect Before Final Tensioning

Before completing the connection, check:

► Correct bolt assembly
► Correct location
► Steel surfaces seated appropriately
► Nut engaged correctly
► Washer position
► Visible thread condition
► No obvious component damage

Finding the wrong bolt before final tensioning is considerably easier than correcting it afterwards.

Keep Installation Records Where Required

Project QA can call for records covering structural fastener batches, inspections or tensioning.

Build those requirements into the installation process rather than trying to recreate them at handover.

Common Structural Bolt Mistakes Worth Avoiding

Bolt fits the hole, so it must be right? No. Diameter is only one part of the structural specification.

Need a little more length? Don't add random washers to compensate for the wrong bolt.

Found a spare Class 8.8 bolt in another box? Confirm it belongs to the correct structural assembly before substitution.

Head marking unreadable? Investigate identification before installing where traceability matters.

Galvanised coating damaged badly? Assess the fastener before installation rather than assuming the finish is cosmetic.

Nut won't run cleanly? Stop & inspect the threads instead of reaching for a larger wrench.

Impact wrench reached maximum effort? That doesn't prove the specified bolt tension has been achieved.

Different batches have been mixed on the ground? Restore identification before the hardware enters the steelwork.

Old structural bolt came out of an existing connection? Don't assume matching it by eye satisfies a new engineered repair.

For broader bolt, screw & anchor selection outside structural assembly work, Fastener Guide Bolts Screws Anchors provides additional practical guidance.