The maturing of the beer is one of the fundamental aspects of the process of creating this drink. There are several techniques from innovative ones those close to tradition.
Standard UNI 699 precisely set the thread and ends of the wood screws. This is replaces the UNI 699:1980 from 18 november 2010.
Already from the name we can guess the particularity of this screw. The bolts specifically the coupling of screw and nut, compounds in most cases from hexagon heads screw and hexagon nuts.