Hexagonal nuts - Import export

Steel version: tempered to 900 N/mm², black oxidised. Stainless steel version: tempered to 900 N/mm², bright.

The surface of the hexagon head bolt is polished and, with regard to design optimised for the use in hygienic environments. The bolt head is convex on the top face and the collar has a conical formed top surface. Instead of troublesome embossing or indentations, the bolt head is smooth with a surface finish of Ra 0.8 µm. Dirt and residue from products or cleaners seldom adheres and easy cleaning is ensured.

When screwing the nuts onto the thread, the thread lock is plastically and elastically deformed. The elastic deformation causes a radial frictional lock against the nuts being loosened. The plastic thread lock is only effective when the nuts are fully screwed onto the male thread. The screw length must be selected so that at least two full threads protrude from the nut. Due to the plastic deformation of the thread lock, these nuts should only be used once.

Body black oxidised. Thrust pin tempered and black oxidised. Drawing reference: M = ball pressure screw N = through hole for socket head screw DIN 912 1) rotation lock 2) screw rest 3) hexagonal nut

Housing steel. Viewing glass thermoplastic polyamide. O-ring and flat seal rubber (NBR). Reflector aluminium. Screw and hex nut steel. Version: Housing painted black. Transparent viewing glass, high mechanical stability, non-ageing, temperature resistant with oil up to 100 °C, with water up to 70 °C. Reflector painted white, markings and scale black. Screw and hexagon nut, electro zinc-plated. Note: The oil level gauges can either be fastened as shown in the illustration or directly in the threaded hole. Centre distance for the fastening holes = L1 ±0.5. The oil level gauges are suitable for tanks operating without pressure. Maximum operating temperature: 100 °C.