trilobular hexagon screws
trilobular pan head screws
Unit type millimeter.
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DIN 7500 C sim, UNI 8112 sim cross recessed pan head trilobular screws Hexalobular Drive (allen)
DIN 7500 C, UNI 8112 cross recessed pan head trilobular screws
DIN 7500 D, UNI 8110 hex head trilobular screw
DIN 7500 E hex socket head cap trilobular screws
UNI 8111 hex head trilobular screw with flange