My installation uses American standard flanges; what is the standard for bolts with small nuts in the chemical industry?
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My installation uses American standard flanges; what is the standard for bolts with small nuts in the chemical industry? HG20634 and SH3404 both correspond to large nuts, right? What standard does the small nut follow? Thank you
In the end, the same standard is used
Bolts and nuts are used together; why are there different sizes of nuts, such as large and small nuts? Does it refer to ordinary nuts and heavy-duty nuts, or 0.8d and 1.0d?
HG/T3404 and 20634 correspond to large nuts, while 20613 refers to small nuts. If you have questions regarding fasteners, feel free to send me a message on the site; I’ll do my best to help.