Screw plug and sealing plug with O-ring

NEW: Stainless steel version with high temperature restistant O-ring

In order to avoid distortion of the plastic part, a homogeneous temperature balance in the mould is crucial. The positioning of the cooling channels plays an important role. Once this is done, the right sealing becomes the next challenge.

Sealing screw with O-ring

As an alternative to the known options, KNARR offers a Screw plug (70943) equipped with an O-ring. Without any additional sealant, it provides an extremely reliable and durable seal. The screw can be mounted very quickly and easily without any preparatory work and can also be reused after disassembly without time-consuming cleaning.

NEW: Even in one more standard size (M6x0.75), the screw plug is now also available as stainless steel version (730943) The FKM high-temperature resistant O-ring, which will also be used in the brass screw plugs in future, allows even higher temperature loads (water 180°C, oil 200°C). The temperature-resistant O-ring can also be ordered separately as a spare part (70198).

Sealing plug with o-ring

For the sealing plug with O-ring (72078) KNARR provides the Torx version. Especially when mounting in hard-to-reach positions, Torx offers the clear advantage that the plug stays on the screwdriver better and slipping is avoided. This protects the inner profile and makes later dismantling easier.
The plug is designed for a maximum water temperature of 100°C (oil 180°C).