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Compare your fastener to our visual size guide to confirm M-size, pitch and length.
Match your driver bit to the screw recess - Phillips, Pozi, slot or internal hex. Our Driving range lists the bit size for every drive type we stock.
Button flange head machine screws combine a low domed button head with an integral flange formed under the head. The flange spreads clamping load over a wider area and resists pull-through, so a separate washer is usually not required. They are fully threaded for tapped holes or nuts and driven with an internal hex (Allen) key.
Also known as: Flanged Button Socket Screw, Button Flange Socket Screw.
Used on thin sheet, soft materials, slotted or oversized holes and panel work where the flange protects the surface and removes the need for a loose washer.
DRIVE TYPES
Internal hex (Allen) - driven with a hex key for high torque without cam-out. Matching keys and bits are in our Driving section.
MATERIALS
Stocked in G304 and G316 stainless and carbon. For the full range see our Button Flange Head Socket Screws category.
THREAD SYSTEMS
Available in metric coarse and fine, plus imperial (UNC/UNF and BSW) threads. Machine screws are fully threaded with a uniform diameter and need a pre-tapped hole or a matching nut - they do not cut their own thread.
WHY AUSTRALIA TRUSTS BOLT & NUT
With 15+ years selling fasteners online from Brisbane, we hold over 25,000 stock lines and 200 million pieces - 98.75% of online orders placed before 1pm leave same day. Save more as you buy more - we offer up to 13 price breaks plus 3 spend-tier discounts. Read our customer reviews or get in touch if you need help picking the right machine screw.
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A button head with an integral flange under it that spreads clamping load over a wider area, so no separate washer is needed. Internal hex drive, fully threaded, in stainless and carbon.
TECHNICAL RESOURCES
Key charts and specification sheets: Imperial vs Metric Strength Chart
For the full library, see our Technical PDF's Library.
