BN 20191 - Self-tapping round washer head screws with Torx®
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Headform Button with collar
Drive Hexalobular socket
Thread fully threaded
Material execution case-hardened
Surface zinc plated blue
Hardness 450 HV
Standard WN 5251
SHEEttracs® is a self tapping screw for safe mounting of thin sheet metal joints with pilot hole.
Compatibility with metrics screws.
Pilot hole recommendations for thin sheets made of cold rolled, soft steel acc. to EN 10130
2. Thread forming
Quenched and tempered fasteners ≥ 360 HV and tempered case-hardened fasteners with electroplated coatings: Susceptible to hydrogen embrittlement!
Further notice to residual risks can be found in the introduction section.