Search Results for: Sewing thread not for retail sale
fasten and connect two parts with through holes. there are many types of bolts. hex bolt divided according to the connection force: there are ordinary bolts and bolts with hinge holes. according to the shape of the head: hex bolt , round head, square head, countersunk head and so on. according to the thread
length, it is divided into two types: full thread and non-full thread. there are two types of coarse teeth and fine teeth according to the thread profile. the coarse profile is not displayed in the bolt symbol. bolts are divided into eight grades , , , , , , , and according to their performance grades...
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