Cap Nuts serve various purposes, offering a rounded cap or cover for exposed threads. The capped head of these nuts serves the dual function of safeguarding screws and enhancing the overall aesthetic by providing a polished appearance to fastenings.

Frank's Fasteners provides Socket Cap Head Screws in A2/304 Stainless Steel and 12.9 High Tensile Steel.

Additional material and finishes can be sourced, don't hesitate to get in touch with us with your enquiry. 



Diameter Pitch Height Across Flats Min thread depth
M3 0.5mm 4.5mm 5.5mm 3.5mm
M4 0.7mm 5.5mm 7.0mm 4.0mm
M5 0.8mm 7.0mm 8.0mm 4.9mm
M6 1.0mm 9.0mm 10.0mm 6.7mm
M8 1.25mm 12.0mm 13.0mm 9.2mm
M10 1.5mm 14.0mm 16.0mm 10.6mm
M12 1.75mm 16.0mm 18.0mm 13.0mm
M14 2.0mm 18.0mm 21.0mm 14.6mm
M16 2.0mm 20.0mm 24.0mm 16.6mm
M18 2.5mm 22.0mm 27.0mm 18.5mm
M20 2.5mm 25.0mm 30.0mm 20.5mm
M22 2.5mm 28.0mm 34.0mm 21.5mm
M24 3.0mm 30.0mm 36.0mm 23.5mm
M27 3.0mm 32.0mm 41.0mm 25.5mm
M30 3.5mm 34.0mm 46.0mm 27.5mm

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