BN 13576 - Flat countersunk head screws with Phillips cross recess form H
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KA22: countersunk head geometry with reinforcement taper.
Headform Countersunk head
Drive Cross recess H (Phillips)
Thread fully threaded
Material execution heat-treated
Surface zinc plated blue
Hardness 380 HV
Standard WN 1413
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.