Metric Stainless Pan Head Metal Thread Screws
Got a tapped hole, threaded insert or matching metric nut? Bremick Machine Screws provide a compact fastening solution for assemblies where the receiving thread already exists. Also known in the Australian trade as metal thread screws, these metric stainless fasteners are suited to equipment, brackets, panels, enclosures, fabricated components & workshop repairs where accurate thread matching matters.
This collection centres on metric stainless pan head Phillips machine screws, with sizes across M2, M2.5, M3, M4, M5, M6 & M8 represented within the range. Instead of choosing from head appearance alone, match the screw to the receiving thread first, then confirm length, head style, drive & stainless requirement.
Need the mating hardware as well? Browse Hex Nut for compatible nut requirements. For a broader range of threaded fasteners, compare Bolts & Fasteners.
A simple rule before ordering: know the M-size, know the length & know what the screw is threading into.
What Are Bremick Machine Screws?
Machine screws are fully threaded fasteners designed to engage a compatible internal machine thread.
Australian workshops & fastener suppliers also commonly refer to this type of fastener as a metal thread screw.
The receiving thread may be located in:
► A matching metric nut
► A tapped metal component
► A threaded insert
► A captive nut
► A threaded bracket
► Machinery or equipment housing
Unlike a self-drilling screw, a standard machine screw isn't selected to drill its own fixing hole.
Unlike a wood screw, it doesn't rely on a coarse thread biting directly into timber.
The existing mating thread determines whether the fastener belongs in the assembly.
For other machine-threaded configurations beyond this collection, browse Machine Screws.
Why Choose Bremick Machine Screws?
Metric Sizes for Compact Assemblies
Machine screws make sense when equipment has already been designed around a defined metric thread.
Sizes such as M2, M2.5 & M3 suit particularly compact fastening requirements, while M4, M5, M6 & M8 cover progressively larger threaded assemblies.
The important part isn't choosing the biggest screw that will fit through the component.
It's matching the thread already there.
Stainless Construction
Stainless machine screws are useful where the specified assembly calls for stainless fastening hardware.
Where the exact stainless grade matters, confirm the individual product specification rather than identifying the material from appearance alone.
Pan Head Profile
A pan head sits above the mounting surface with a broad, rounded profile.
This differs from a countersunk head, which is designed to seat into a compatible tapered recess.
Use the head style intended for the component.
Phillips Drive
A Phillips recess provides a familiar drive format for assembly & maintenance work.
Driver fit still matters.
Using an incorrect or badly worn bit can damage the recess before the screw reaches its final position.
Common Applications
Machinery Covers & Access Panels
Missing one screw from a machine guard?
Don't start with the miscellaneous fastener drawer.
Remove another original screw from the same panel where practical & compare its diameter, length, head profile & drive.
That gives you a much stronger reference for selecting the replacement.
Control Boxes & Equipment Enclosures
Compact metric machine screws can secure suitable covers, internal brackets & equipment components.
Length deserves particular attention.
A replacement that's unnecessarily long can project further inside an enclosure than intended.
Fabricated Brackets
Tapped holes allow components to be assembled without necessarily requiring access for a separate nut behind every fixing.
Where a drawing nominates a particular machine screw, match the specified thread, length & head rather than choosing by diameter alone.
For workshop preparation around metal components, browse Metal Cutting & Grinding Tools.
Equipment Repairs
Maintenance work often exposes previous repairs.
One panel might contain original fasteners, another screw that's too long & a third with a different head style altogether.
Use the receiving thread & equipment requirements to establish what belongs there rather than copying the most recent repair.
Instrument & Component Mounting
Smaller M2, M2.5 & M3 machine screws can suit compact assemblies where space is limited.
At these sizes, guessing diameter by eye becomes increasingly unreliable.
Keep a correctly identified sample or measure the fastener.
Workshop Assembly
For repeat assembly work, labelled machine-screw storage can save considerable time.
Sort hardware by:
M-size | length | head | drive | material
A compartment labelled M4 x 16 | Pan Head | Phillips | Stainless is far more useful than one labelled small silver screws.
Product Selection Guide
Buying Metric Machine Screws? Start With the Thread
Work through the connection in this order.
Identify the M-size
Is the receiving thread M3, M4, M5, M6 or another metric size?
Confirm the required length
Measure the assembly rather than assuming longer is better.
Check the head
This collection uses a pan-head format.
Confirm the drive
The range uses Phillips drive.
Check the material
Confirm the stainless requirement for the application.
Inspect the mating thread
A new screw won't repair a damaged tapped hole.
If those six details agree, you've got a much stronger basis for selecting the correct fastener.
Metric Machine Screw Sizes
The range covers compact through to larger metric machine-screw sizes.
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Metric Size
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Useful Selection Check
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M2
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Confirm small component thread carefully
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M2.5
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Don't confuse it with M3
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M3
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Check required length & available thread depth
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M4
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Confirm the receiving component is actually M4
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M5
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Match thread, length & head requirement
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M6
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Check available depth before choosing longer screws
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M8
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Confirm the larger assembly requires M8
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Available lengths can vary between diameters.
Don't assume every M-size comes in every length.
M2 & M2.5 Machine Screws
Very small machine screws deserve careful identification.
An M2.5 fastener can easily disappear into the same organiser compartment as M2 or M3 hardware, but the threads aren't interchangeable.
For small equipment repairs, keep the original fastener until the replacement has been identified.
M3 Machine Screws
M3 is a common compact metric size, but diameter is only the beginning.
Two M3 screws can share the same nominal thread while having completely different lengths.
Check how much thread the assembly actually requires.
M4 Machine Screws
M4 machine screws can suit panels, brackets, fabricated components & general equipment assemblies where an M4 mating thread is provided.
A screw appearing close to the hole diameter doesn't establish thread compatibility.
Confirm the thread before installation.
M5 Machine Screws
Moving to M5 increases nominal diameter, but the buying process remains the same.
Match:
► M5 thread
► Required length
► Pan-head requirement
► Phillips drive
► Stainless specification
Don't use a larger machine screw as a quick fix for a damaged smaller thread.
M6 Machine Screws
M6 pan head machine screws can be used across larger panels, brackets & mechanical assemblies where the correct M6 female thread is provided.
Length selection becomes especially important when the screw enters a blind tapped hole.
Check the available depth before ordering.
M8 Machine Screws
M8 sits toward the larger end of this machine-screw collection.
Don't let the larger diameter encourage bolt-style assumptions.
The same basic checks still apply: thread, length, head, drive, material & available engagement.
Machine Screws vs Metal Thread Screws
Shopping for metal thread screws?
You may already be looking at the same general type of fastener.
Within Australian trade terminology, machine screws are frequently described as metal thread screws because they're designed to engage a compatible machine thread.
Whichever name appears on the job list, confirm:
► Metric or imperial
► Diameter
► Thread
► Length
► Head style
► Drive
► Material
Pan Head vs Countersunk Machine Screws
Same thread doesn't mean same fastener.
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Pan Head Machine Screw
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Countersunk Machine Screw
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Raised rounded head
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Designed for a tapered recess
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Bears against the component surface
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Seats into compatible countersunk geometry
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Useful for suitable covers & brackets
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Useful where a flush head is required
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Head remains visible above surface
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Head can sit flush when correctly matched
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Don't force a pan head into a countersunk fitting simply because the thread fits.
Phillips vs Other Drive Types
This collection centres on Phillips pan head machine screws.
A Phillips driver should fit positively into the recess.
If the bit rocks excessively, sits too shallow or slips under moderate pressure, check the driver before continuing.
Repeated cam-out can damage the fastener & make later removal harder.
Machine Screw With Nut
Some assemblies use a machine screw as a through-fastener.
The screw passes through unthreaded components & a matching nut completes the connection.
Check:
► Screw diameter
► Nut thread
► Required screw length
► Available projection
► Washer requirement where specified
The nut needs to match the machine screw thread.
Machine Screw Into a Tapped Hole
A tapped-hole connection doesn't require a separate nut.
The component itself provides the female thread.
That makes available threaded depth particularly important.
A screw that's too long can bottom out before the components clamp correctly.
A screw that's too short may not provide the engagement required by the assembly.
Blind Hole vs Through Hole
Know which one you're dealing with.
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Blind Tapped Hole
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Through Hole
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Stops inside the component
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Passes completely through
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Maximum screw depth matters
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Rear projection matters
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Long screw can bottom out
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Long screw can interfere behind component
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Debris can reduce usable depth
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Rear clearance needs checking
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Measure the actual assembly rather than choosing length from memory.
Machine Screw vs Self-Drilling Screw
They solve different fastening problems.
A machine screw engages an existing compatible thread.
A self-drilling screw creates its fixing through suitable material during installation.
For applications where the screw needs to drill into suitable sheet material, browse Self-Drilling Screws.
Machine Screw vs Hex Bolt
A conventional hex bolt is driven using its external hex head.
Pan head machine screws use a screw-drive recess such as Phillips.
Both can be part of threaded assemblies, but head style, dimensions & installation requirements can differ.
Don't substitute based only on nominal diameter.
Stainless 304 vs Stainless 316 Machine Screws
Different stainless grades are available across the wider machine-screw market.
Where Stainless 304 or Stainless 316 is specifically required, match the nominated material rather than assuming any stainless fastener is equivalent.
Thread compatibility alone doesn't establish material suitability.
Do You Need a Washer?
Not every machine-screw assembly uses one.
Where the design calls for a washer, check its internal diameter, outside diameter, thickness, material & effect on available thread engagement.
For conventional load-spreading hardware where specified, browse Flat Washer.
Do You Need a Locking Nut?
A through-bolted machine-screw assembly can sometimes call for a locking nut rather than a conventional hex nut.
That requirement should come from the assembly rather than being added automatically.
Where a nylon insert locking arrangement is specified, compare Nylon Insert Nut.
Replacing a Missing Machine Screw
Don't measure the empty hole & guess.
Instead:
► Find an original fastener from the same assembly
► Identify its M-size
► Measure its length
► Check its head style
► Confirm the drive
► Inspect the receiving thread
► Verify the material requirement
If no original remains, work from the equipment documentation or positively identify the receiving thread.
Start the Screw Before Reaching for Power
A compatible machine screw should start cleanly in an undamaged mating thread.
Where practical, engage the first few turns by hand.
If the screw immediately binds, investigate before continuing.
Possible causes include:
► Wrong M-size
► Wrong thread
► Cross-threading
► Damaged female thread
► Contamination
► Misalignment
Forcing the screw can turn a cheap fastener replacement into a damaged-component repair.
Expert Tips
Use the tapped component as your starting point. The female thread determines what screw belongs there.
Keep one known original during dismantling. Don't mix every fastener into the same tray before identifying replacements.
Write M-size & length together. “M6 screw” isn't a complete description when several lengths can exist.
Measure blind-hole depth before increasing length. A longer screw can bottom out before the joint clamps.
Separate M2.5 from M3 stock. Small dimensional differences become difficult to judge once loose fasteners are mixed.
Start clean threads by hand. Unexpected resistance deserves investigation, not more driver torque.
Inspect captive nuts during repairs. A damaged captive thread can make a perfectly correct new screw feel wrong.
Check head clearance. A raised pan head needs enough space around covers, guards & adjacent components.
Use the correct Phillips bit. A damaged recess makes later maintenance unnecessarily difficult.
Confirm stainless requirements where specified. Similar appearance doesn't prove material grade.
For a broader explanation of selecting screws, bolts & other fastening types, read Fastener Guide Bolts Screws Anchors.
Workshop repairs often depend on identifying small components correctly before the equipment goes back together. A Day With An Automotive Mechanic Peninsula provides a practical workshop perspective.
For another look at why apparently minor fastening choices deserve attention, read Why Good Fasteners Matter More Than the Tool You Drive Them With.
