Nut: Stainless steel, European Standard 1.4305
(American Standard 303 series)
||GN 6330-NI stainless steel fixture
nuts are used for applications where constant removal and re-installation
is required m = 1.5 x d1).
The spherical seating together with female washer
DIN 6319 allows excessive positioning inaccuracies to be equalized.
Stainless steel spherical washers, see DIN