The S50, S51 are press-in inserts to be installed into cylindrical holes

Suitable for soft thermoplastics

The helical knurl of the outer surface is specially designed to facilitate insertion by allowing maximum plastic sliding of the material in the serration grooves

They allow easy and low-cost assembly, as no special machinery is required 

Offer moderate pull-out and good torque resistance

They are available in unheaded S50, and headed (flanged) S51 versions. Headed (flanged) version provides bearing surface for the mating component to prevent jack-out. In the S51 a screw can be inserted on the opposite side of the flange, allowing to achieve very high pull-out resistance. It also ensures a large contact area, which is useful for electrical contacts and specific applications

The S50 in addition are symmetrical so they do not need to be oriented during installation process. They also have a large smooth area at their ends with a reduced diameter to facilitate insertion and proper alignment in the hole

Inch versions from 2-56 to 5/16-18 are also available on request