Simplified marking of fasteners The marking of fasteners can be simplified according to the following simplification principles: 1) The age of fastener names and standard numbers are allowed to be omitted; 2) When only o...
Thread fit is the size of looseness or tightness between screw threads. The level of fit is the prescribed combination of deviations and tolerances on internal and external threads. For unified inch threads, there are th...
The diameter of the thread is divided into large diameter (D or d), small diameter (D1 or d1) and middle diameter. The large diameter of ordinary thread and ladder thread is also called the nominal diameter. The top diam...
On the section passing through the thread axis, the outline shape of the thread is called a thread profile. It has triangle type, ladder type, sawtooth type and square type, etc. Different thread tooth types have differe...
A fastener refers to a part capable of performing a fastening function. Threaded fasteners refer to fasteners with threads, which are manufactured according to a certain size. It performs its basic function through the m...
Specifications of American screws, such as 6 # -32 * 3/8, 6 # is the outer diameter of the tooth, which is close to 3.5mm; 32 is 32 teeth per inch of thread length (equivalent to the pitch of the metric screw); 3 / 8 is ...
