A double-end stud is a fastener threaded at both ends with a smooth shank in the middle, mainly used to connect two components. Its specifications follow relevant standards, and the common parameters are listed below:
Diameter: The diameter of a double-end stud is usually marked in millimeters (mm) or inches, such as M6, 1/4 inch, etc.
Length: The length of a double-end stud refers to the total length of the bolt (threads at both ends plus the middle shank), normally expressed in millimeters or inches, such as 25 mm, 1 inch, etc.
Material: Double-end studs can be made of carbon steel, stainless steel, alloy steel and other materials, chosen according to the actual service environment and performance requirements.
Thread type: The threads of double-end studs include metric threads and unified inch threads, commonly including metric M series, UNC (Unified Coarse) series, UNF (Unified Fine) series, etc.
Property class: The class of a double-end stud represents its mechanical strength. Common classes are 8.8, 10.9, 12.9, etc. The higher the class, the greater the strength and load-bearing capacity.
Note that the exact specifications of double-end studs shall comply with corresponding national standards (such as GB/T 901, GB/T 897, etc.). For selection, please refer to relevant standards or consult professionals based on actual needs.
The following parameters may also be considered when defining double-end stud specifications:
Thread type: In addition to metric and inch threads, special threads such as tapered threads and pipe threads can be used as required.
Thread length: This refers to the effective thread length at both ends of the stud, available in equal-length and unequal-length designs. It can be adjusted for assembly to ensure proper thread engagement and connection.
Surface treatment: To improve corrosion resistance and appearance, double-end studs can be surface-treated with galvanizing, nickel plating, Dacromet, etc. Heat treatment is a process to enhance strength, not a surface treatment.
Anti-loosening configuration: Double-end studs have no built-in anti-loosening structure. For anti-loosening applications, matching fasteners such as lock nuts and spring washers can be used.
The specifications of double-end studs should be determined according to the specific application and assembly requirements to meet the safety and performance demands of the connection. For particular standards or requirements, refer to the corresponding industry standards or consult professionals for detailed and accurate information.
