gama CLASSIC. duritate 56-58 HRC. DIN 3126. ISO 1173. Dimensiuni: L: 25 mm.

ORIGIN: recent footprint developed to make assemblies tamper proof.,FEATURES: snake-eyes shape "snake eye". Safety screw: can not be unscrewed without the proper tip. It prevents too strong a tightening of the screw because there is a strong constraint of notching (the tip can twist if one squeezes too much). Very often in stainless steel: the adapted tip is then the Hicrom.