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Hygienic DESIGN narrow shank screws

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Hygienic DESIGN narrow shank screws

According to the Machinery Directive (MD) and EU standard 2006/42/EC, fastenings on machines and their components must be captive. Narrow shank screws are used in machine construction for this reason: they prevent the removal of complex screw fastenings. However, conventional components available on the market are not suitable for use in hygiene-sensitive areas. As a specialist in components for hygienic applications, NovoNox KG has addressed this problem and offers hexagon head screws with narrow shanks and retaining washers that meet Hygienic DESIGN requirements.
Alongside the safety aspects, the hexagon head narrow shank screws made from 1.4404 stainless steel also have the advantages of being easy to clean and able to form a tight seal on the external areas of the screw fastening points. The significance of these properties can be seen from the example of the machine construction company HDG’s recommended annual system cleaning. This can quickly lead to problems if, for example, a screw head is damaged during the routine and long-term maintenance work.
Hexagon head screws with a sophisticated equipment system
When replacing a machine part, conventional screws must be sawn off and ground, which leads to unwanted shavings and particle build-up. Furthermore, the washers which are deformed during the initial tightening cannot be removed. This is where the innovative hexagon head captive screws from NovoNox KG come to the rescue. The washer can be twisted on over the threaded part, allowing it to be twisted off again without any problems or mechanical deformations. The screw can now be replaced cleanly, free of dirt and particles.
“Damage to the screw shank – as a result of a notch effect, for example – is also prevented, as is spontaneous unscrewing of the screw during manual operation,” says Jürgen Leuze, Division Manager at NovoNox. “Furthermore, the washers can be removed non-destructively without tools whilst still ensuring the reusability of the screws.”
Components with polished surfaces
Hexagon head screws with a narrow shank and retaining washer from NovoNox KG have polished surfaces and a special design. The screw head is rounded at the top and the top collar face is inclined. The surface roughness depth is less than Ra 0.8 with no interfering embossing or indentations. This prevents dirt and cleaning agent residue from adhering to the components.
Narrow shank screws, including the Hygienic USIT® version, are now available for highly sensitive hygiene requirements. With the sealing ring and shim washer from Freudenberg Sealing Technologies, the fastening point is hermetically sealed, preventing contamination through germs and bacteria. The polished surface, whose quality is now even higher, ensures cleaning is exceptionally easy and cuts down the time spent on this work to a considerable degree. Hygienic DESIGN and Hygienic USIT® narrow shank screws thus offer outstanding added value that no production company with strict hygiene requirements can do without.
 20170115_PM_NovoNox_Hygienic_DESIGN_narrow_shank_screws_EN 2,1 MB
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