Fully Threaded Hex Fasteners for Trade & Industrial Assembly

A fastening joint can look straightforward until thread system, strength class, finish and material all enter the equation. Bremick Set Screws provide fully threaded hex-head fastening options for machinery, fabrication, construction, maintenance and industrial assembly where the fastener needs to match the connection rather than simply fit through the hole.

Unlike a partially threaded bolt, a hex set screw carries thread along substantially all of its shank. That makes it useful where a nut, threaded component or adjustable clamping position needs thread engagement further along the fastener. Bremick offers metric and imperial configurations across different grades, materials and finishes for workshop, maintenance and project-based purchasing.

Building a complete bolted connection? Bolts & Fasteners covers the wider fastening range, while Nuts & Washers provides complementary hardware for compatible assemblies.

Before ordering by diameter alone, confirm thread system, pitch, length, strength class, material, finish and mating hardware. A set screw that slides through the clearance hole may still be wrong for the thread on the other side.

What Are Bremick Set Screws?

Think of a conventional hex-head fastener with thread extending along essentially the full usable shank.

That is the style of fastener covered by this Bremick range.

These fully threaded hex set screws are designed to work with compatible nuts or internally threaded components, depending on the assembly.

Bremick's broader set screw families include configurations such as:

► Metric set screws
► UNC set screws
► UNF set screws
► BSW set screws
► Class 4.6 options
► Class 8.8 high tensile set screws
► Class 10.9 set screws
► Grade 5 imperial set screws
► Grade 8 imperial set screws
► Stainless steel set screws
► Zinc-plated set screws
► Galvanised set screws
► Plain steel set screws

Availability varies between individual product families.

Set Screw or Grub Screw?

Here's one distinction worth clearing up before the wrong fastener lands on the bench.

In this collection, set screw refers to a fully threaded fastener with a hex head.

A grub screw, sometimes called a socket set screw, is generally headless and internally driven. It is commonly used to secure collars, pulleys or similar components onto shafts.

They solve different fastening problems.

Why Choose Bremick Set Screws?

Full Thread Where the Connection Needs It

Some assemblies need thread engagement almost anywhere along the fastener length.

A fully threaded set screw provides that flexibility, particularly where fixture thickness or nut position varies between jobs.

Multiple Strength Classes

One workshop can contain everything from general fastening to high-strength machinery connections.

Bremick set screw families include different strength classifications, including metric Class 4.6, Class 8.8 and selected Class 10.9 options plus imperial Grade 5 and Grade 8 configurations.

The specified connection should decide the grade.

Metric and Imperial Thread Systems

Imported machinery, older equipment and locally built assemblies don't always use the same thread system.

Bremick's broader range covers metric and imperial configurations, helping maintenance and procurement teams replace the actual fastener rather than the nearest-looking alternative.

Need a broader refresher on how bolt and screw families differ? Fastener Guide Bolts Screws Anchors covers common fastening types and applications.

Materials and Finishes for Different Environments

A fastener inside dry machinery doesn't face the same conditions as one on exposed equipment.

Depending on the product family, Bremick set screws are available in plain, zinc-plated, galvanised and stainless configurations.

Choose the finish around the environment, mating hardware and project requirements.

Common Applications

Machinery Assembly

Machine guards, mounting plates, brackets and replaceable components can require fully threaded hex fasteners where the correct grade and thread system are already defined.

The best replacement is the one that matches the equipment specification, not simply the one that accepts the same spanner.

Fabrication Work

Picture two steel brackets being clamped together with a nut on the far side.

A fully threaded set screw can provide flexibility where the exact clamping position varies across the assembly.

For compatible load-spreading hardware, browse Flat Washer.

Maintenance Shutdowns

A shutdown crew shouldn't have to discover halfway through reassembly that the replacement fastener uses the wrong pitch.

Keep removed hardware organised by machine or joint and record the thread before ordering replacements.

Steel Construction

Certain fabricated steel connections call for defined fastener classes, dimensions and finishes.

Where high-strength or structural fastening is specified, work from the project documentation rather than substituting a general-purpose fully threaded bolt.

For related heavy-duty hardware, compare Structural Fasteners & Bolts.

Workshop Repairs

Replacing one missing fastener can be more difficult than ordering a box of new ones.

Keep an intact original where possible.

Its diameter, thread, head markings, length and finish provide useful clues when matching the replacement.

Agricultural Equipment

Farm machinery can expose fasteners to vibration, moisture, dirt and regular servicing.

Replacement set screws need to match the thread and strength requirements while also considering the environment in which the machine works.

Manufacturing and Production Equipment

Repeat assemblies benefit from repeatable hardware identification.

Labelling fastener stock by thread system, diameter, length, grade and finish is more useful than storing everything under a generic “hex bolts” description.

Facility and Property Maintenance

Building services, equipment frames, guards and workshop infrastructure can all involve fully threaded hex fasteners.

For maintenance teams managing several sites, standardised identification can make replenishment considerably easier.

Product Selection Guide

Start With the Thread System

Before choosing length or finish, identify the thread.

Bremick set screw families can include:

Diameter alone is not enough to identify an imperial thread.

Pitch matters.

Metric Set Screws

Metric hex set screws are specified by nominal thread diameter and length, with pitch forming part of the thread specification.

M8, M10, M12 and similar designations describe the nominal thread diameter rather than the across-flats head size.

That matters when ordering from a maintenance list or measuring existing hardware.

UNC Set Screws

UNC uses a coarse unified thread.

These fasteners are common across many imperial assemblies and can appear on imported machinery, agricultural equipment and older industrial hardware.

Match diameter and threads per inch before ordering.

UNF Set Screws

UNF uses a finer thread than UNC at comparable diameters.

A nut can appear close enough to start on the wrong fastener, which is exactly why forcing it is a bad identification method.

If clean undamaged threads don't engage naturally by hand, stop and check.

BSW Set Screws

BSW threads remain relevant across older machinery and established imperial equipment.

A thread gauge or known mating nut is far more reliable than guessing from diameter alone.

Class 4.6 Set Screws

Class 4.6 fasteners suit connections specified around that metric property class.

Where a machine, drawing or assembly calls for Class 4.6, don't replace it purely on the assumption that a higher class is automatically better.

Class 8.8 High Tensile Set Screws

Class 8.8 set screws are widely used across higher-strength metric fastening.

Bremick currently lists Grade 8.8 metric hex set screw families in plain and galvanised finishes, with sizes extending across multiple metric diameters and lengths.

The mating nut and washer arrangement should suit the same connection.

Class 10.9 Set Screws

Where the assembly calls for greater fastener strength, selected Class 10.9 set screws may be appropriate.

That doesn't make them a universal replacement for Class 8.8 hardware.

The complete joint needs to be suitable for the specified class.

Grade 5 UNC Set Screws

Bremick currently offers Grade 5 UNC zinc set screws within its imperial range.

These are fully threaded imperial fasteners and should be matched to compatible UNC nuts or tapped components.

Keep Grade 5 identification separate from metric property classes.

Grade 8 Imperial Set Screws

Grade 8 imperial fasteners serve different applications again.

A Grade 8 imperial set screw and a metric Class 8.8 set screw are not alternative names for the same specification.

Thread system and grading system both need to match the job.

For specialised fastening requirements beyond everyday hex hardware, browse Specialty Fasteners.

Zinc-Plated Set Screws

Zinc-plated hardware is common across indoor workshop and general industrial applications.

The finish still needs to suit the service environment.

Don't assume a familiar silver appearance means the fastener belongs outdoors.

Galvanised Set Screws

Bremick's Grade 8.8 galvanised metric range includes sizes such as M10, M12, M16 and M20 in selected lengths.

Galvanised hardware can suit applications where that finish is required, but coating compatibility should be considered across the whole assembly.

Plain High Tensile Set Screws

Plain-finish high tensile fasteners are frequently used in appropriate engineering and industrial applications.

Storage matters before installation because uncoated steel can be vulnerable to moisture.

Stainless Steel Set Screws

Corrosion resistance can make stainless attractive for particular environments.

Bremick currently lists Stainless 316 metric hex set screws across sizes from M4 upward, with multiple lengths within the family.

Use the material grade required by the application rather than assuming all stainless fasteners are interchangeable.

Metric Stainless 316 Set Screws

A stainless set screw can still have all the same dimensional selection requirements as a carbon-steel fastener.

Check:

► Metric diameter
► Thread pitch
► Length
► Stainless grade
► Mating nut
► Washer material
► Environment

Corrosion resistance doesn't compensate for incorrect thread selection.

UNC Stainless 316 Set Screws

Bremick also lists Stainless 316 set screws in UNC thread.

That makes thread identification especially important when an old stainless fastener is being replaced.

A clean appearance doesn't tell you whether the thread is metric or imperial.

High Tensile Set Screw vs Standard Set Screw

Strength classification is the key distinction.

Choose the fastener class around the assembly requirements.

Full Thread Set Screw vs Part Thread Bolt

Thread length can change how the joint carries load.

A set screw is fully threaded along most or all of the usable shank.

A part-thread bolt includes an unthreaded shank section.

If the original connection used an unthreaded shank through a shear plane, replacing it with a set screw changes the fastener configuration.

Don't make that substitution casually.

Match the Nut to the Thread

A compatible nut should run onto a clean, undamaged thread without being forced.

Resistance after the first turn can point to:

► Wrong pitch
► Wrong thread system
► UNC and UNF mismatch
► Metric and imperial mismatch
► Thread damage
► Contamination
► Cross-threading

A longer spanner won't make the threads more compatible.

Match Strength Across the Assembly

A high-strength fastener works as part of a connection.

The nut, washer, tapped component and surrounding material need to suit the assembly.

Using a high tensile set screw with unsuitable mating hardware can undermine the intended specification.

For compatible nut and washer requirements, return to Nuts & Washers.

Washer Selection Is Part of the Connection

A washer can influence bearing area, surface protection and the complete joint stack.

Select by:

► Inside diameter
► Outside diameter
► Thickness
► Material
► Hardness where specified
► Finish

Don't simply grab the first washer that fits over the thread.

Measure Set Screw Length Correctly

Conventional hex-head set screw length is measured from beneath the head to the end of the fastener.

That makes accurate replacement easier.

Compare dimensions consistently rather than including the head in one measurement and excluding it in another.

Thread Pitch Matters as Much as Diameter

M10 tells you the nominal diameter.

It doesn't always tell you everything about pitch.

Likewise, two 3/8-inch imperial fasteners can use different thread systems.

When the thread is unknown, measure rather than guess.

Replacing a Missing Fastener Without a Sample

No original screw left?

Work from the mating component.

Identify:

► Thread diameter
► Thread pitch
► Required length
► Strength class or grade
► Head clearance
► Material
► Finish
► Washer arrangement

The threaded hole is a better source of information than the empty clearance hole in the fixture.

Head Clearance Matters During Maintenance

A hex head needs access for a socket or spanner.

Check surrounding components before selecting hardware, particularly on machinery where guards or covers may restrict tool access.

A connection that's difficult to assemble will usually be difficult to service later as well.

Tightening Requirements Should Come From the Joint

“Very tight” isn't a torque specification.

Fastener diameter, property class, coating, lubrication, joint design and material all influence tightening requirements.

Where specified torque applies, use the applicable equipment, engineering or manufacturer data.

Reusing Removed Set Screws

A fastener that unscrewed successfully isn't automatically fit for another service cycle.

Inspect for:

► Damaged threads
► Corrosion
► Rounded hex flats
► Stretch or deformation
► Galling
► Surface damage
► Uncertain previous loading

Specification-controlled joints deserve particular care around reuse.

Expert Tips

Nut stops after one turn? Check thread system and pitch before reaching for a bigger spanner.

Replacing a part-thread bolt with a fully threaded set screw? Confirm the unthreaded shank wasn't serving a deliberate function.

M10 written on the job sheet? Treat that as thread diameter, not the complete specification.

Working on older equipment? Keep a thread gauge nearby rather than trying to identify UNC, UNF and BSW visually.

Class 8.8 specified? Check the nut and washer at the same time instead of upgrading only the screw.

Stainless threads begin to bind? Stop early and inspect the alignment and thread condition before damage develops.

Ordering workshop stock? Label bins with thread, size, grade and finish rather than relying on visual sorting.

Replacing corroded outdoor hardware? Ask whether the original finish suited the exposure before buying the same thing again.

Why Good Fasteners Matter More Than the Tool You Drive Them With looks at why apparently small hardware choices can affect much larger repair and maintenance jobs.