The quarter turns made out of Steel / Zinc plated studs have a max tensile strength of 10.000 N with a working load 7.000N.
While the Stainless steel quarter turn studs have a max tensile strength of 7.000 N with a working load 4.500N.
These are heavy duty studs, and as in the above information they have a high tensile strength and preload.
Commercial vehicles, coaches, agricultural machinery, chemical engineering, heating systems etc.
Most standard version for the stud is the hex head slotted recess stud and the 180° folding wing head stud.
The most standard for retaining washer is 991W04-1BP made out of stainless steel, and for receptacles it's 991R2-3AGV which is zinc plated.