O.N. Industries Ltd. started the manufacturing of stainless steel fitting products in 1964.

New head office/factory are located in Tsuyama City, Okayama prefecture, Japan. There are appx. 200 employees in our headquarter/factory and business office around Japan.

Our flagship product, "O.N. Fitting" has a unique connecting method called pipe enlargement system. It is certified product of DVGW W534.

Among other products, Nice Joint(Domestic market product, trademark of O.N. Industries Ltd.) for general purpose piping gained the first ISO 9001 certification in this industrial field in Japan(April 1999) and we are striving for rnhanced customer satisfaction through high quality and stable supply to respond to strong demand from our customers.

In the 21st century, environmental hormones and the recycling products have gained prominent attention as social problems. We gained ISO14001 certification(June 2006) and we desire to devote ourselves to the manufacturer of stainless steel products that contribute to respect for human life and the improvement of the global environment.

O.N. Fitting, designed for stainless steel pipe in accordance with EN standard, has unique connecting method called pipe enlargement system.

It employs pipe enlargement system with an original structure. This system does not require any specialized technology such as threading, heat or flame for installation. Even compare with press type fitting, O.N. Fitting can be installed at about same working speed.

Unlike welded fitting, that is difficult to change layout after the installation, O.N. Fitting can be rearranged and changing layout easily. Our system does not require heat or flame at the installation site. It allows installers to do faster and safer work even in narrow space, where it is not possible to replace the fitting by welding.

O.N. Fitting is not only for suitable for water and compressed air, but also durable enough to withstand high temperature water and ultra pure water.
It has been employed in lots of factories and various public facilities in Japan and more than 40 years history.