M3 A4 INOX Stainless Steel Hygienic design cap nut

What are Hygienic cap nuts?

Hygienic cap nuts have a refined exterior polish, designed for optimal performance in sanitary settings. Their upper section is spherically shaped, while the collar features a finely contoured conical top. The nut's intentionally low-profile design minimises troublesome corners which can harbour dust or bacteria. Thanks to their highly polished surface finish, measuring well below Ra 0.8 µm, these nuts remain virtually impervious to the adherence of dirt particles.

Tightening torques

Contact surface/head support made from A2 or A4 stainless steel. Coefficient of friction for thread and head support μges = 0.23. Preload force based on 80% of the 0.2% yield point of Rp0.2 = 200 N/mm².

Fitting instructions

It is reccomended when fitting to use a spanner fitting with a plastic insert, part number WDS 7657. This allows for damage-free tightening and loosening.

What industries and applications are these typically used in?

Hygienic design cap nuts find applications across a range of industries where sanitation and cleanliness are paramount. They are commonly used in the food and beverage industry to maintain stringent hygiene standards and prevent contamination. Additionally, hygienic design cap nuts are essential in pharmaceutical and healthcare sectors, ensuring the integrity of critical equipment and minimisng the risk of infection. These nuts also have relevance in laboratory and biotechnology environments where sterility and precision are crucial.

Aesthetics and design

In addition to aforementioned hygienic benefits, these nuts are also perfect for applications where a proffesional and polished look is required. These nuts are perfect for finishing products in enviroments such as marine, chemical indsutries, OEM, agriculture or just general outdoor use.