-
Hobsons - M42 x 450 - Hex Bolt - 316 Stainless - A4 | BH16PCM420450Hobsons - M42 x 450 - Hex Bolt - 316 Stainless - A4 | BH16PCM420450This Hobson M42 x 450 is a hex head bolt for structural and general fastening, tightened with a spanner or socket.► Key Features Size: M42 x 450 Finish: 316 Stainless...
- $176.15
- $176.15
- Unit price
- per
-
Hobsons - M42 x 300 - Hex Bolt - 316 Stainless - A4 | BH16PCM420300Hobsons - M42 x 300 - Hex Bolt - 316 Stainless - A4 | BH16PCM420300This Hobson M42 x 300 is a hex head bolt for structural and general fastening, tightened with a spanner or socket.► Key Features Size: M42 x 300 Finish: 316 Stainless...
- $158.54
- $158.54
- Unit price
- per
-
Hobsons - M42 x 250 - Hex Bolt - 316 Stainless - A4 | BH16PCM420250Hobsons - M42 x 250 - Hex Bolt - 316 Stainless - A4 | BH16PCM420250This Hobson M42 x 250 is a hex head bolt for structural and general fastening, tightened with a spanner or socket.► Key Features Size: M42 x 250 Finish: 316 Stainless...
- $123.31
- $123.31
- Unit price
- per
-
Hobsons - M42 x 200 - Hex Bolt - 316 Stainless - A4 | BH16PCM420200Hobsons - M42 x 200 - Hex Bolt - 316 Stainless - A4 | BH16PCM420200This Hobson M42 x 200 is a hex head bolt for structural and general fastening, tightened with a spanner or socket.► Key Features Size: M42 x 200 Finish: 316 Stainless...
- $88.08
- $88.08
- Unit price
- per
-
Hobsons - M42 x 160 - Hex Bolt - 316 Stainless - A4 | BH16PCM420160Hobsons - M42 x 160 - Hex Bolt - 316 Stainless - A4 | BH16PCM420160This Hobson M42 x 160 is a hex head bolt for structural and general fastening, tightened with a spanner or socket.► Key Features Size: M42 x 160 Finish: 316 Stainless...
- $70.46
- $70.46
- Unit price
- per
-
Hobsons - M24 x 500 - Hex Bolt - 316 Stainless - A4 | BH16PCM240500Hobsons - M24 x 500 - Hex Bolt - 316 Stainless - A4 | BH16PCM240500This Hobson M24 x 500 is a hex head bolt for structural and general fastening, tightened with a spanner or socket.► Key Features Size: M24 x 500 Finish: 316 Stainless...
- $61.65
- $61.65
- Unit price
- per
-
Hobsons - M20 x 600 - Hex Bolt - 316 Stainless - A4 | BH16PCM200600Hobsons - M20 x 600 - Hex Bolt - 316 Stainless - A4 | BH16PCM200600This Hobson M20 x 600 is a hex head bolt for structural and general fastening, tightened with a spanner or socket.► Key Features Size: M20 x 600 Finish: 316 Stainless...
- $196.24
- $196.24
- Unit price
- per
-
Hobsons - M20 x 500 - Hex Bolt - 316 Stainless - A4 | BH16PCM200500Hobsons - M20 x 500 - Hex Bolt - 316 Stainless - A4 | BH16PCM200500This Hobson M20 x 500 is a hex head bolt for structural and general fastening, tightened with a spanner or socket.► Key Features Size: M20 x 500 Finish: 316 Stainless...
- $163.94
- $163.94
- Unit price
- per
-
Hobsons - M20 x 450 - Hex Bolt - 316 Stainless - A4 | BH16PCM200450Hobsons - M20 x 450 - Hex Bolt - 316 Stainless - A4 | BH16PCM200450This Hobson M20 x 450 is a hex head bolt for structural and general fastening, tightened with a spanner or socket.► Key Features Size: M20 x 450 Finish: 316 Stainless...
- $149.73
- $149.73
- Unit price
- per
-
Hobsons - M16 x 550 - Hex Bolt - 316 Stainless - A4 | BH16PCM160550Hobsons - M16 x 550 - Hex Bolt - 316 Stainless - A4 | BH16PCM160550This Hobson M16 x 550 is a hex head bolt for structural and general fastening, tightened with a spanner or socket.► Key Features Size: M16 x 550 Finish: 316 Stainless...
- $65.18
- $65.18
- Unit price
- per
-
Hobsons - M16 x 500 - Hex Bolt - 316 Stainless - A4 | BH16PCM160500Hobsons - M16 x 500 - Hex Bolt - 316 Stainless - A4 | BH16PCM160500This Hobson M16 x 500 is a hex head bolt for structural and general fastening, tightened with a spanner or socket.► Key Features Size: M16 x 500 Finish: 316 Stainless...
- $51.08
- $51.08
- Unit price
- per
-
Hobsons - M48 x 450 - Hex Bolt Blank - 316 Stainless - A4 | BH16PBM480450Hobsons - M48 x 450 - Hex Bolt Blank - 316 Stainless - A4 | BH16PBM480450This Hobson M48 x 450 is a hex head bolt for structural and general fastening, tightened with a spanner or socket.► Key Features Size: M48 x 450 Finish: 316...
- $299.46
- $299.46
- Unit price
- per
-
Hobsons - M39 x 400 - Hex Bolt Blank - 316 Stainless - A4 | BH16PBM390400Hobsons - M39 x 400 - Hex Bolt Blank - 316 Stainless - A4 | BH16PBM390400This Hobson M39 x 400 is a hex head bolt for structural and general fastening, tightened with a spanner or socket.► Key Features Size: M39 x 400 Finish: 316...
- $229.00
- $229.00
- Unit price
- per
-
Hobsons - M36 x 400 - Hex Bolt Blank - 316 Stainless - A4 | BH16PBM360400Hobsons - M36 x 400 - Hex Bolt Blank - 316 Stainless - A4 | BH16PBM360400This Hobson M36 x 400 is a hex head bolt for structural and general fastening, tightened with a spanner or socket.► Key Features Size: M36 x 400 Finish: 316...
- $158.54
- $158.54
- Unit price
- per
-
Hobsons - M36 x 300 - Hex Bolt Blank - 316 Stainless - A4 | BH16PBM360300Hobsons - M36 x 300 - Hex Bolt Blank - 316 Stainless - A4 | BH16PBM360300This Hobson M36 x 300 is a hex head bolt for structural and general fastening, tightened with a spanner or socket.► Key Features Size: M36 x 300 Finish: 316...
- $140.92
- $140.92
- Unit price
- per
-
Hobsons - M33 x 200 - Hex Bolt Blank - 316 Stainless - A4 | BH16PBM330200Hobsons - M33 x 200 - Hex Bolt Blank - 316 Stainless - A4 | BH16PBM330200This Hobson M33 x 200 is a hex head bolt for structural and general fastening, tightened with a spanner or socket.► Key Features Size: M33 x 200 Finish: 316...
- $88.08
- $88.08
- Unit price
- per
-
Hobsons - M30 x 300 - Hex Bolt Blank - 316 Stainless - A4 | BH16PBM300300Hobsons - M30 x 300 - Hex Bolt Blank - 316 Stainless - A4 | BH16PBM300300This Hobson M30 x 300 is a hex head bolt for structural and general fastening, tightened with a spanner or socket.► Key Features Size: M30 x 300 Finish: 316...
- $88.08
- $88.08
- Unit price
- per
-
Hobsons - M30 x 200 - Hex Bolt Blank - 316 Stainless - A4 | BH16PBM300200Hobsons - M30 x 200 - Hex Bolt Blank - 316 Stainless - A4 | BH16PBM300200This Hobson M30 x 200 is a hex head bolt for structural and general fastening, tightened with a spanner or socket.► Key Features Size: M30 x 200 Finish: 316...
- $52.85
- $52.85
- Unit price
- per
-
Hobsons - M27 x 300 - Hex Bolt Blank - 316 Stainless - A4 | BH16PBM270300Hobsons - M27 x 300 - Hex Bolt Blank - 316 Stainless - A4 | BH16PBM270300This Hobson M27 x 300 is a hex head bolt for structural and general fastening, tightened with a spanner or socket.► Key Features Size: M27 x 300 Finish: 316...
- $70.46
- $70.46
- Unit price
- per
-
Hobsons - M27 x 200 - Hex Bolt Blank - 316 Stainless - A4 | BH16PBM270200Hobsons - M27 x 200 - Hex Bolt Blank - 316 Stainless - A4 | BH16PBM270200This Hobson M27 x 200 is a hex head bolt for structural and general fastening, tightened with a spanner or socket.► Key Features Size: M27 x 200 Finish: 316...
- $44.04
- $44.04
- Unit price
- per
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Limited Time Offers
Maxisafe - Boot Laces 1200mm - Yellow & Brown | FLA856-YLW&BRN
Maxisafe - Boot Laces 1200mm - Yellow & Brown | FLA856-YLW&BRN Cougar replacement boot laces in a 1200mm length, two-tone yellow & brown. A Maxisafe Cougar footwear accessory. Supplied through Maxisafe, an Australian supplier of PPE and workplace safety products. Available now at Industrial...
- $2.25
$2.92- $2.25
- Unit price
- / per
Maxisafe - Boot Laces 1200mm - Black & Brown | FLA856-BLK&BRN
Maxisafe - Boot Laces 1200mm - Black & Brown | FLA856-BLK&BRN Cougar replacement boot laces in a 1200mm length, two-tone black & brown. A Maxisafe Cougar footwear accessory. Supplied through Maxisafe, an Australian supplier of PPE and workplace safety products. Available now at Industrial...
- $2.25
$2.92- $2.25
- Unit price
- / per
Kincrome - Anti-Cut Dipped Gloves - XXL | K18202-XXL
Kincrome - Anti-Cut Dipped Gloves - XXL | K18202-XXL Kincrome anti-cut dipped work gloves for handling sharp materials, in size XXL to suit the biggest hands. Kincrome is an Australian-designed tool brand trusted in workshops and on job sites across the country. Ready to...
- $14.90
$14.95- $14.90
- Unit price
- / per
Kincrome - Anti-Cut Dipped Gloves - XL | K18202-XL
Kincrome - Anti-Cut Dipped Gloves - XL | K18202-XL Kincrome anti-cut dipped work gloves for handling sharp materials, in size XL to suit extra-large hands. Kincrome is an Australian-designed tool brand trusted in workshops and on job sites across the country. Ready to ship...
- $14.90
$14.95- $14.90
- Unit price
- / per
Kincrome - Anti-Cut Dipped Gloves - Large | K18202-L
Kincrome - Anti-Cut Dipped Gloves - Large | K18202-L Kincrome anti-cut dipped work gloves for handling sharp materials, in size Large to suit large hands. Kincrome is an Australian-designed tool brand trusted in workshops and on job sites across the country. Ready to ship...
- $14.90
$14.95- $14.90
- Unit price
- / per
Kincrome - Anti-Cut Dipped Gloves - Medium | K18202-M
Kincrome - Anti-Cut Dipped Gloves - Medium | K18202-M Kincrome anti-cut dipped work gloves for handling sharp materials, in size Medium to suit medium hands. Kincrome is an Australian-designed tool brand trusted in workshops and on job sites across the country. Ready to ship...
- $14.90
$14.95- $14.90
- Unit price
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► Hex Bolts
Strong, Accurate Fastening for Machinery & Fabrication Get the right hex bolt the first time & keep your next repair or assembly moving. From machinery maintenance to fabricated steelwork, a correctly specified bolt helps deliver dependable clamping, accurate fitment & consistent performance. The key is matching more than just the...
Strong, Accurate Fastening for Machinery & Fabrication
Get the right hex bolt the first time & keep your next repair or assembly moving. From machinery maintenance to fabricated steelwork, a correctly specified bolt helps deliver dependable clamping, accurate fitment & consistent performance. The key is matching more than just the diameter.
A hex head can look identical across several fastener types, yet thread pitch, length, strength grade & shank design may differ. Industrial Shed's Hex Bolts collection helps Australian tradespeople, fabricators & maintenance teams understand the specifications that matter before ordering.
Choose the Right Hex Bolt
Different jobs call for different bolt specifications. Compare these common options when identifying a replacement or planning a new assembly:
-
Metric hex bolts: specified by nominal diameter, thread pitch & length for compatible metric assemblies.
-
High tensile hex bolts: selected where the joint requires a particular property class, such as 8.8 or 10.9.
-
Partially threaded hex bolts: feature an unthreaded shank section that may be important to the joint's load path.
-
Fully threaded hex fasteners: offer extended thread engagement where the relevant standard & joint design permit.
-
Imperial hex bolts: use inch-based thread systems, including UNC or UNF where specified.
-
Corrosion-resistant finishes: require selection based on environmental exposure, material compatibility & the fastener's mechanical specification.
For other bolt head styles & configurations, browse Bolts. Confirm the individual product dimensions before substituting one design for another.
Hex Bolt Sizes: Diameter, Pitch & Length
Need to replace a missing bolt but only have the original fastener to measure? Start with the nominal thread diameter, thread pitch & length measured from beneath the head.
An M10 × 1.5 × 50 mm bolt, for example, has a nominal 10 mm thread diameter, a 1.5 mm pitch & a 50 mm length. Head dimensions, threaded length & unthreaded shank length should also be checked against the relevant standard.
Buying tip: Measure the complete fastener rather than matching the spanner size alone. The width across flats identifies the head dimension, not necessarily the thread diameter.
Coarse vs Fine Thread Hex Bolts
Thread pitch is one of the easiest details to overlook & one of the most important to get right.
Coarse-thread metric bolts are commonly used for general fastening applications. Their pitch follows the standard coarse-thread series for the nominal diameter.
Fine-thread metric bolts have a smaller pitch for the same nominal diameter. They may be specified where the equipment design requires particular adjustment, engagement or fastening characteristics.
An M10 × 1.5 coarse-thread bolt will not correctly engage an M10 × 1.25 fine-thread nut. Even if the diameter matches, forcing the connection can damage both components.
When replacing an existing fastener, always match the original thread pitch unless the complete joint has been approved for a different specification.
High Tensile Hex Bolts: Grade 8.8 vs 10.9
Strength markings provide a useful starting point when selecting bolts for machinery & industrial equipment. Metric property classes such as 8.8 & 10.9 indicate different specified mechanical strength characteristics.
A Grade 10.9 bolt generally has higher nominal strength than Grade 8.8, but that does not make it a universal upgrade. The correct choice depends on the original design, mating components, tightening procedure & operating conditions.
For critical assemblies, follow the manufacturer's specified bolt property class rather than choosing the highest available grade.
Match Hex Bolts With the Correct Hex Nuts
A well-selected bolt still needs a compatible nut to form the intended connection. Thread diameter & pitch must match exactly, while the nut's property class must be appropriate for the specified joint.
Browse Hex Nut when sourcing matching nuts for replacement bolts or new assemblies. Check the nut's thread designation, material, strength class & applicable standard.
For bearing surfaces beneath bolt heads or nuts, compare Flat Washers. Washer selection should account for hole diameter, outside diameter, material & the intended clamping arrangement.
Partially Threaded vs Fully Threaded Fasteners
Choosing between a partially threaded bolt & a fully threaded fastener can affect how the joint carries load.
A partially threaded hex bolt includes an unthreaded shank that may be specified to pass through the joined components. A fully threaded fastener places threads along more of its length, changing the available grip & thread engagement.
Avoid replacing a partially threaded bolt with a fully threaded alternative solely because the overall length matches. Compare the original drawing, thread length & application requirements.
For additional fastening configurations, explore Bolts & Fasteners.
Materials, Finishes & Corrosion Protection
Outdoor equipment, workshop machinery & fabricated assemblies can experience very different exposure conditions. Zinc-plated steel, galvanised steel, stainless steel & other constructions offer different combinations of corrosion resistance & mechanical performance.
Check the specified finish before ordering. Coating thickness, contact with dissimilar metals & lubrication conditions can influence fitment or tightening behaviour.
Where a manufacturer specifies a torque value, confirm that it applies to the fastener's actual material, coating & lubrication condition.
Safety & Care
-
Match the nominal diameter, thread pitch, length & head dimensions.
-
Confirm the required strength grade & fastener standard.
-
Check threaded length & unthreaded shank configuration.
-
Inspect mating threads, holes & contact surfaces for damage.
-
Follow the specified tightening sequence, torque & lubrication requirements.
-
Replace damaged, stretched or designated single-use fasteners.
-
Reinspect critical bolted joints according to the equipment maintenance schedule.
Hex Bolts for Australian Trade & Industrial Work
Whether you're replacing machinery fasteners or preparing a fabricated assembly, correct hex bolt selection helps reduce damaged threads, poor fitment & unnecessary repeat work.
Industrial Shed supports Australian maintenance teams, tradespeople & fabricators comparing hex bolt specifications for workshop repairs, machinery servicing & equipment assembly.
Hex Bolts FAQs
How Do I Measure a Hex Bolt Correctly?
Measure the nominal thread diameter, thread pitch & length from beneath the head. Check the head dimensions, threaded length & strength marking against the original specification.
What Is the Difference Between Coarse & Fine Thread Hex Bolts?
Coarse-thread bolts have a larger thread pitch than fine-thread bolts of the same nominal diameter. The two are not interchangeable unless the complete mating connection is changed to suit.
Can I Replace an 8.8 Hex Bolt With a 10.9 Bolt?
Not automatically. Although 10.9 has higher nominal strength, the original joint may require a specific grade, nut combination & tightening procedure. Follow the equipment manufacturer's requirements.
Should I Choose a Fully Threaded or Partially Threaded Hex Bolt?
Use the design specified for the assembly. The unthreaded shank on a partially threaded bolt can be important to fitment & load transfer, so matching overall length alone is insufficient.
Industrial Shed Support
Trying to match a replacement hex bolt? Check the thread pitch, dimensions, property class & finish before ordering. Industrial Shed supports Australian trade & industrial buyers sourcing compatible fastening components.
Review Shipping & Delivery for delivery information. For product identification, replacement enquiries & manufacturer warranty assistance, visit Warranty & Parts Support.
Sidebar
Brands
► Hex Bolts
Strong, Accurate Fastening for Machinery & Fabrication
Get the right hex bolt the first time & keep your next repair or assembly moving. From machinery maintenance to fabricated steelwork, a correctly specified bolt helps deliver dependable clamping, accurate fitment & consistent performance. The key is matching more than just the diameter.
A hex head can look identical across several fastener types, yet thread pitch, length, strength grade & shank design may differ. Industrial Shed's Hex Bolts collection helps Australian tradespeople, fabricators & maintenance teams understand the specifications that matter before ordering.
Choose the Right Hex Bolt
Different jobs call for different bolt specifications. Compare these common options when identifying a replacement or planning a new assembly:
-
Metric hex bolts: specified by nominal diameter, thread pitch & length for compatible metric assemblies.
-
High tensile hex bolts: selected where the joint requires a particular property class, such as 8.8 or 10.9.
-
Partially threaded hex bolts: feature an unthreaded shank section that may be important to the joint's load path.
-
Fully threaded hex fasteners: offer extended thread engagement where the relevant standard & joint design permit.
-
Imperial hex bolts: use inch-based thread systems, including UNC or UNF where specified.
-
Corrosion-resistant finishes: require selection based on environmental exposure, material compatibility & the fastener's mechanical specification.
For other bolt head styles & configurations, browse Bolts. Confirm the individual product dimensions before substituting one design for another.
Hex Bolt Sizes: Diameter, Pitch & Length
Need to replace a missing bolt but only have the original fastener to measure? Start with the nominal thread diameter, thread pitch & length measured from beneath the head.
An M10 × 1.5 × 50 mm bolt, for example, has a nominal 10 mm thread diameter, a 1.5 mm pitch & a 50 mm length. Head dimensions, threaded length & unthreaded shank length should also be checked against the relevant standard.
Buying tip: Measure the complete fastener rather than matching the spanner size alone. The width across flats identifies the head dimension, not necessarily the thread diameter.
Coarse vs Fine Thread Hex Bolts
Thread pitch is one of the easiest details to overlook & one of the most important to get right.
Coarse-thread metric bolts are commonly used for general fastening applications. Their pitch follows the standard coarse-thread series for the nominal diameter.
Fine-thread metric bolts have a smaller pitch for the same nominal diameter. They may be specified where the equipment design requires particular adjustment, engagement or fastening characteristics.
An M10 × 1.5 coarse-thread bolt will not correctly engage an M10 × 1.25 fine-thread nut. Even if the diameter matches, forcing the connection can damage both components.
When replacing an existing fastener, always match the original thread pitch unless the complete joint has been approved for a different specification.
High Tensile Hex Bolts: Grade 8.8 vs 10.9
Strength markings provide a useful starting point when selecting bolts for machinery & industrial equipment. Metric property classes such as 8.8 & 10.9 indicate different specified mechanical strength characteristics.
A Grade 10.9 bolt generally has higher nominal strength than Grade 8.8, but that does not make it a universal upgrade. The correct choice depends on the original design, mating components, tightening procedure & operating conditions.
For critical assemblies, follow the manufacturer's specified bolt property class rather than choosing the highest available grade.
Match Hex Bolts With the Correct Hex Nuts
A well-selected bolt still needs a compatible nut to form the intended connection. Thread diameter & pitch must match exactly, while the nut's property class must be appropriate for the specified joint.
Browse Hex Nut when sourcing matching nuts for replacement bolts or new assemblies. Check the nut's thread designation, material, strength class & applicable standard.
For bearing surfaces beneath bolt heads or nuts, compare Flat Washers. Washer selection should account for hole diameter, outside diameter, material & the intended clamping arrangement.
Partially Threaded vs Fully Threaded Fasteners
Choosing between a partially threaded bolt & a fully threaded fastener can affect how the joint carries load.
A partially threaded hex bolt includes an unthreaded shank that may be specified to pass through the joined components. A fully threaded fastener places threads along more of its length, changing the available grip & thread engagement.
Avoid replacing a partially threaded bolt with a fully threaded alternative solely because the overall length matches. Compare the original drawing, thread length & application requirements.
For additional fastening configurations, explore Bolts & Fasteners.
Materials, Finishes & Corrosion Protection
Outdoor equipment, workshop machinery & fabricated assemblies can experience very different exposure conditions. Zinc-plated steel, galvanised steel, stainless steel & other constructions offer different combinations of corrosion resistance & mechanical performance.
Check the specified finish before ordering. Coating thickness, contact with dissimilar metals & lubrication conditions can influence fitment or tightening behaviour.
Where a manufacturer specifies a torque value, confirm that it applies to the fastener's actual material, coating & lubrication condition.
Safety & Care
-
Match the nominal diameter, thread pitch, length & head dimensions.
-
Confirm the required strength grade & fastener standard.
-
Check threaded length & unthreaded shank configuration.
-
Inspect mating threads, holes & contact surfaces for damage.
-
Follow the specified tightening sequence, torque & lubrication requirements.
-
Replace damaged, stretched or designated single-use fasteners.
-
Reinspect critical bolted joints according to the equipment maintenance schedule.
Hex Bolts for Australian Trade & Industrial Work
Whether you're replacing machinery fasteners or preparing a fabricated assembly, correct hex bolt selection helps reduce damaged threads, poor fitment & unnecessary repeat work.
Industrial Shed supports Australian maintenance teams, tradespeople & fabricators comparing hex bolt specifications for workshop repairs, machinery servicing & equipment assembly.
Hex Bolts FAQs
How Do I Measure a Hex Bolt Correctly?
Measure the nominal thread diameter, thread pitch & length from beneath the head. Check the head dimensions, threaded length & strength marking against the original specification.
What Is the Difference Between Coarse & Fine Thread Hex Bolts?
Coarse-thread bolts have a larger thread pitch than fine-thread bolts of the same nominal diameter. The two are not interchangeable unless the complete mating connection is changed to suit.
Can I Replace an 8.8 Hex Bolt With a 10.9 Bolt?
Not automatically. Although 10.9 has higher nominal strength, the original joint may require a specific grade, nut combination & tightening procedure. Follow the equipment manufacturer's requirements.
Should I Choose a Fully Threaded or Partially Threaded Hex Bolt?
Use the design specified for the assembly. The unthreaded shank on a partially threaded bolt can be important to fitment & load transfer, so matching overall length alone is insufficient.
Industrial Shed Support
Trying to match a replacement hex bolt? Check the thread pitch, dimensions, property class & finish before ordering. Industrial Shed supports Australian trade & industrial buyers sourcing compatible fastening components.
Review Shipping & Delivery for delivery information. For product identification, replacement enquiries & manufacturer warranty assistance, visit Warranty & Parts Support.
- Choosing a selection results in a full page refresh.