Hanging ring nut, carbon steel grade 4.8 circular nut, galvanized nut, national standard hanging nut

"Cross recessed pan head screws refer to cross recessed machine screws, denoted by the letter PM. The national regulations specify that the thread specification is M1.6-M10, the performance grade is 4.8, A-50, A2-70, CU2, CU3 and AL4, H and Z cross recessed pan head screws, and the product grade is A.
If other technical requirements are required, they should be selected from the current standards (such as GB/T196, GB/T3106, GB/T3098.1, GB/T3098.6, and GB/T3098.10)"

"Plain thread
Ordinary coarse thread: feature code M+nominal diameter+rotation direction+thread tolerance zone code (pitch diameter, top diameter) - rotation length
Ordinary fine pitch thread: feature code M+nominal diameter * pitch+direction of rotation+thread tolerance zone code (pitch diameter, top diameter) - turning length
Right-handed threads are omitted and left handed threads are indicated by "LH".
M 16-5g6g represents coarse pitch regular threads, with a nominal diameter of 16 and a right-hand thread. The thread tolerance zone has a pitch diameter of 5g and a major diameter of 6g, and the screwing length is considered to be of medium length.
M16 × 1 LH-6G represents fine pitch ordinary thread, with a nominal diameter of 16 and a pitch of 1. It is left handed and has a tolerance zone of 6G for both pitch and major diameters. The thread engagement length is considered to be of medium length.
The annotation format is: feature code (represented by G for cylindrical pipe threads and NPT for conical pipe threads)+size code+tolerance level code+rotation direction
G1A - LH represents British non threaded sealing pipe threads, with a size code of 1 inch, left-hand rotation, and a tolerance level of A.
Rcl/2 represents British thread sealing cone pipe thread, size code 1/2in, right handed"

The advantages of riveting nuts include: 1. ensuring the length of the distance range, greatly simplifying the assembly process, and accelerating the production progress of assembled spacing panels and accessories; 2. The back of the plate remains completely flush, while ensuring a smooth surface between the nut column head and the plate surface; 3. The raw materials are made of easy cutting iron or stainless steel; Technical Guidelines for the Application of Riveted Nut Columns: 1. When selecting nut columns, the size range must be determined based on the thickness of the plate used. The hardness of low-carbon steel plates must be less than 70RB, and the hardness of stainless steel plates must be less than 80RB. 2. The surface of easy cutting iron is treated, while stainless steel remains in its original color. Users can order according to the model specifications in the table or customize according to their needs. 3. The hole size of the board must be processed according to the tolerance size of 0-+0.075mm, and punching is recommended. 4. Installation must be achieved through "riveting" operations and must not be impacted or knocked in. 5. When using stainless steel as the material, the tail number is indicated with "S". 6. The end face of the nut column with straight teeth is represented by "C". 7. The through-hole nut column with a length of 10mm or less is full thread, and can be expanded in hexagonal square (Type I) or circular end face (Type II) when the length is 10mm or more.

Spring washers are widely used in load-bearing and non load-bearing structures of general mechanical products, characterized by low cost, convenient installation, and suitable for frequently installed and disassembled parts. The automatic selection of washers is included, but the anti loosening ability of spring washers is very low! Especially in products that require high reliability in European and American countries, the adoption rate is extremely low, especially in important load-bearing structure connection parts that have long been abandoned. Our country still has some applications in military industry, but it has been improved to stainless steel material. Steel spring washers have long been banned from use in CASC! It can also be said that it is very unsafe, due to two reasons: 1) the "rising circle" and 2) hydrogen embrittlement.

Inch thread is a type of thread size marked in the English system, which can be divided into two types according to the shape: cylindrical and conical; There are two types according to the tooth shape angle: 55 ° and 60 °. The 1/4, 1/2, and 1/8 marks in threads refer to the diameter of the thread size, measured in inches. One inch is equal to 8 minutes, 1/4 inch is 2 minutes, and so on.