Industrial Goods and ServicesCoupling Manufacturer - Hofmann Fluid Power, Inc. Home About Us Ask A Question RFQ Contact Us Search by Part# Plug Profiles (pdf) Fluid Compatibility Coupling Design/Selection Product Attributes Call 815.744.8300 We are a coupling manufacturer that offers standard and custom machined hydraulic and pneumatic parts in stainless steel, brass, electroless nickel and chrome since 1950. In 2007 we are featuring six balls in each of our series “A” and Miniature couplers. This will vastly improve excess vibrations and help distribute the force of