Seclock screw
SecuFast® Seclock machine screw is an unique design with an angle and a radius that can resist the grip of a pair of pliers or any other tools. The Seclock can only be dismantled using special tools. Seclock screws are often used to secure certain parts of machinery that should not be opened by operators. Available in diameters M3 - M20 and in material steel zinc and stainless steel A2 and A4.