Stainless Steel (C - CSS / CSOS) Concealed Head Standoffs

Product Details

Concealed head clinch standoffs are installed in a milled blind hole using a press and become securely captivated in the parent material. The concealed head feature ensures the opposite face of the material is left completely smooth and unmarked.

These standoffs are made of 300 series stainless steel and are suitable for installation in material of up to 70HRB hardness.

Two types are listed below - CSS for 1.6mm minimum sheet thickness and CSOS for 2.4mm minimum sheet thickness.


Thread SizeHole DiameterMin. distance centre to panel edge

C-CSS standoffs require a 1.1mm minimum hole depth in the material.

C-CSOS standoffs require a 1.95mm minimum hole depth in the material.

Standoff length is the length left protruding after installation. Dimensions in mm.

Thread Size
For Sheet Thickness
Part RefOrder CodeOrder MultipleQty
M341.6 +C - CSS M3-4XCSS34100
M361.6 +C - CSS M3-6XCSS36100
M381.6 +C - CSS M3-8XCSS38100
M3101.6 +C - CSS M3-10XCSS310100
M3121.6 +C - CSS M3-12XCSS312100
M3161.6 +C - CSS M3-16XCSS316100
M3201.6 +C - CSS M3-20XCSS320100
M3251.6 +C - CSS M3-25XCSS325100
M461.6 +C - CSS M4-6XCSS46check
M481.6 +C - CSS M4-8XCSS48check
M4101.6 +C - CSS M4-10XCSS410check
M4121.6 +C - CSS M4-12XCSS412check
M561.6 +C - CSS M5-6XCSS56check
M581.6 +C - CSS M5-8XCSS58check
M5101.6 +C - CSS M5-10XCSS510check
M5121.6 +C - CSS M5-12XCSS512check
M342.4 +C - CSOS M3-4XCSOS34100
M362.4 +C - CSOS M3-6XCSOS36100
M382.4 +C - CSOS M3-8XCSOS38100
M3102.4 +C - CSOS M3-10XCSOS310100
M3122.4 +C - CSOS M3-12XCSOS312100
M3162.4 +C - CSOS M3-16XCSOS316100
M3202.4 +C - CSOS M3-20XCSOS320100
M462.4 +C - CSOS M4-6XCSOS46check
M482.4 +C - CSOS M4-8XCSOS48check
M4102.4 +C - CSOS M4-10XCSOS410check
M4122.4 +C - CSOS M4-12XCSOS412check
M562.4 +C - CSOS M5-6XCSOS56check
M582.4 +C - CSOS M5-8XCSOS58check
M5102.4 +C - CSOS M5-10XCSOS510check
M5122.4 +C - CSOS M5-12XCSOS512check

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