Class 8 Fastening for Metric Bolted Assemblies
A metric hex nut can look right in the parts tray & still be wrong for the bolt in front of you. Bremick Metric Hex Nuts give Australian fabricators, mechanics, builders, maintenance crews & industrial buyers a conventional six-sided fastening solution for compatible metric bolts, studs & threaded assemblies.
Start with the mating thread rather than judging a nut by its outside dimensions. Hex Nut provides the broader hex-nut range, while Bolts & Fasteners covers related hardware for complete bolted connections.
Bremick's ISO metric range includes Class 8 metric hex nuts across common sizes & finishes. Whether you're replacing an M8 nut on workshop equipment, matching an M12 fastener in a fabricated assembly or replenishing larger M16, M20 & M24 hardware, the key checks are thread size, pitch, property class, finish & mating fastener.
What Are Bremick Metric Hex Nuts?
Bremick metric hex nuts are internally threaded hexagonal fasteners designed to mate with compatible metric male threads. Their six external flats provide straightforward engagement with a correctly sized socket, spanner or wrench during assembly, adjustment & removal.
Depending on the individual product family, buyers may encounter descriptions including:
► Metric hex nuts
► ISO metric hex nuts
► Hexagon nuts
► Class 8 hex nuts
► High tensile hex nuts
► Plain metric hex nuts
► Zinc plated hex nuts
► Galvanised hex nuts
► M8 hex nuts
► M10 hex nuts
► M12 hex nuts
► M16 hex nuts
► M20 hex nuts
► M24 hex nuts
Bremick documents relevant Class 8 ISO metric hex nut families to AS 1112-2000, including plain, zinc plated & galvanised options.
Size terminology only answers part of the question. “M12 hex nut” identifies the nominal thread diameter but doesn't by itself establish the complete nut specification. Thread pitch, property class & finish can still determine whether the fastener belongs in the connection.
For a wider introduction to threaded hardware, Fastener Guide Bolts Screws Anchors covers common fastening types encountered across trade work.
Why Choose Bremick Metric Hex Nuts?
Repeat assembly becomes much easier when the hardware bin reflects what the job actually calls for. Bremick metric hexagon nuts provide familiar external tool engagement with options covering common metric diameters, Class 8 requirements & different finishes.
Relevant characteristics across the range include:
► ISO metric thread sizing
► Class 8 options
► Common trade sizes from smaller metric hardware through to larger diameters
► Plain finishes
► Zinc plated finishes
► Galvanised finishes
► Conventional six-sided tool engagement
► Compatibility with correctly specified metric male threads
For workshops carrying several sizes, separating an M10 Class 8 hex nut from other M10 hardware removes uncertainty before assembly begins.
Finish deserves the same attention. A plain Class 8 nut, zinc plated metric nut & galvanised metric nut may share the same nominal diameter while serving different fastening requirements.
For broader nut & washer requirements, Nuts & Washers provides another relevant hardware range.
Common Applications
Metric bolted joints turn up everywhere from fabricated equipment frames to machinery waiting on a scheduled maintenance shift.
Bremick metric hex nuts can be relevant to:
► Machinery assembly
► Steel fabrication
► Equipment frames
► Agricultural equipment
► Workshop repairs
► Plant maintenance
► Brackets & supports
► Trailer repairs
► Equipment mounting
► Construction assemblies
► Serviceable mechanical connections
► Replacement fastening
Fabrication shops producing repeat assemblies benefit from keeping metric nut sizes, property classes & finishes clearly separated rather than relying on visual identification.
Maintenance crews face the opposite problem when the original nut is missing, rounded or badly corroded. The remaining bolt, stud, equipment drawing or matching fasteners can provide the information needed to identify a replacement.
Agricultural & plant repairs add another complication: dirt, corrosion, damaged threads & previous repairs can make old hardware difficult to identify accurately.
For a practical Australian maintenance perspective, Quarry Crews Crusher Maintenance provides related reading.
Product Selection Guide
Four details resolve most metric hex-nut orders: thread size, property class, finish & mating hardware. Confirm those before reaching for the spanner.
Identify The Metric Thread
Use the bolt or stud as your reference when the original nut specification isn't known.
Confirm the nominal metric diameter—such as M8, M10, M12, M16, M20 or M24—then verify the thread pitch where required.
A similar-looking imperial nut isn't a substitute for a metric thread. Correct, undamaged mating threads should start cleanly by hand without being forced.
Separate Nut Size From Property Class
M8 & Class 8 may appear on the same purchasing conversation, but they describe completely different characteristics.
M8 refers to an 8 mm nominal metric thread diameter.
Class 8 refers to a metric nut property classification.
Where the connection requires a Class 8 metric hex nut, maintain that requirement rather than choosing another nut simply because its thread fits.
For more specialised bolted connections, Structural Fasteners & Bolts provides a related fastening range.
Select The Required Finish
Two Class 8 nuts of the same diameter can still differ in the finish surrounding the steel.
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Metric Hex Nut Family
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Practical Consideration
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Plain
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Where the assembly specifies a plain nut
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Zinc Plated
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Plated option for suitable general fastening applications
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Galvanised
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For compatible assemblies where galvanised hardware is required
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Don't choose a finish independently of the connection.
Consider the mating bolt or stud, connected materials, working environment & established assembly requirements before changing from plain to zinc plated or galvanised hardware.
Check The Complete Bolted Assembly
Thread compatibility gets the nut onto the bolt; the complete specification determines whether it should stay there.
Confirm:
► Metric diameter
► Thread pitch where required
► Nut property class
► Finish
► Male-thread condition
► Washer requirement
► Available thread engagement
► Tool clearance
Where a washer forms part of the connection, Flat Washer provides related options.
A conventional metric hex nut also shouldn't automatically replace a locking design. Lock Nut provides alternatives where the assembly specifically requires a locking nut configuration.
For more context on treating hardware as a complete fastening system, Why Good Fasteners Matter More Than the Tool You Drive Them With explores why small component choices matter.
Expert Tips
A clearly labelled fastener drawer saves considerably more time than a mixed bucket once machinery is already apart.
► Store metric hex nuts by diameter, property class & finish
► Keep M8, M10, M12, M16, M20 & M24 stock clearly separated
► Don't confuse M8 with Class 8
► Record thread pitch where different pitches are used
► Use a known mating bolt or stud when identifying loose stock
► Separate plain, zinc plated & galvanised hex nuts
► Inspect male threads before fitting a replacement nut
► Stop if a new nut begins binding unexpectedly
► Use a socket or spanner that engages properly across the flats
► Record regularly used fastening specifications for repeat maintenance orders
Where physical dimensions need confirming, Calipers (Digital / Manual) provides useful workshop measuring equipment.
