Hygienic Cap Nuts

Hygienic Cap Nuts feature a blue seal which prevents water and bacterial from seeping into hard to reach places and completely cover any exposed thread. The seal also prevents the metal on metal contact which can also be unhygienic due to the friction when fastening. We offer our Hygienic Nuts with EPDM or NBR seals.

Our Hygienic Nuts are made from A4 Stainless Steel and have a maximum roughness of 0.8μm Ra to limit microscopic bacteria. These Screws are EHEDG Hygienic Standard Type EL – Class I AUX Certified and 3-A (RPSCQC) Certified and have a self-draining design making them suitable for us in wash-down areas. A primary benefit when cleaning these bolts is that they can be jet washed; this is particularly useful within food manufacturing settings where large volumes of liquid and food can spill over.

The Nuts are the female equivilent of our Hygienic Hex Head Screws and are also available in M5 to M24 threads.

What is the difference between EPDM and NBR sealants?

NBR is resistant to oils, fuels and chemicals whereas EPDM has a good level of resistance to UV, heat and weathering. They can both be used within hygienic settings due to their low absorption to water which can harbour bacteria.