This International Standard specifies the characteristics of Cross recessed pan head tapping screws with thread sizes from ST 2,2 to ST 9,5 inclusive.

Surface hardness:

The minimum surface hardness after heat treatment
shall be 450 HV 0,3

Core hardness:

The core hardness af?er heat treatment shall be
270 HV 5 to 390 HV 5 for threads S ST3,9, and
270 HV 10 to 390 HV 10 for threads > ST4,2.

If you are looking for flange head screws, please contact us for further information.

Self tapping screws torsional strength

Hardened Self Tapping Stainless Steel Screws , Pan Head Self Drilling Screw

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Hardened Self Tapping Stainless Steel Screws , Pan Head Self Drilling Screw

Flange Head Screws

Cross Head Screw

Self Tapping Screws

Pan Head Screw

Flat Head Screw

Socket Head Cap Screw

Hex Head Bolt

Prevailing Torque Nut

Heavy Hex Nuts

Metric Threaded Rod

Spring Lock Washers

Steel Flat Washers

Metal Dowel Pins

Socket Shoulder Screw

Hardened Self Tapping Stainless Steel Screws , Pan Head Self Drilling Screw

teks self drilling screws

csk self drilling screws

countersunk self drilling screws