There are several standards for rivet nut studs in the hardware industry

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This post was last edited by Keep running on 2016-12-5 at 15:33. The link is http://www.yafan88.com/up/image/201612/20161202112998429842.png. A riveting nut post, also known as a rivet stud or nut post, is a type of fastener used in sheet metal, thin plates, chassis, and cabinets. It has a hexagonal shape at one end and a cylindrical shape at the other; there is a chamfer between the hexagonal part and the cylindrical part. The interior of this post features internal threads. Using a press, the hexagonal head is pressed into a pre-made hole in the thin plate (the diameter of such holes is generally slightly larger than the outer diameter of the cylindrical part of the riveting nut post), causing plastic deformation around the edge of the hole. The deformed material is then forced into the chamfer on the riveting nut post, thereby securing it to the thin plate and creating effective internal threads for fixation. What is a press rivet nut post? Based on material and the type of internal thread, rivet nuts are divided into four types: SO-type rivet nuts with through-holes made of free-cutting steel, SOS-type rivet nuts with through-holes made of stainless steel, BSO-type rivet nuts with blind holes made of free-cutting steel, and BSOS-type rivet nuts with blind holes made of stainless steel. These types are used in different application environments. There are no specific **standards** for rivet nut posts. The early manufacturers were from the United States, and after they were introduced to China, industry standards evolved over time to what they are today. Most domestic manufacturers are located in areas such as Suzhou in Jiangsu and Dongguan in Guangdong. According to industry standards, riveting studs are standard fasteners with internal threads in terms of their external shape. The tightening direction of the rivet screw is the exposure direction of such fasteners. Its types include: grounding studs ； Sunk stud ； Rising rivet stud ； There are several main categories such as extruded studs, reamed studs, double-ended studs, and regular studs. Below is a detailed introduction to the differences between various types of rivet studs. In addition to being distinguished by their operating conditions, studs and nuts can also be differentiated by their models: the length code in the stud’s designation indicates the length of the exposed portion after riveting, while that in the nut’s designation indicates the length of the part that is inserted. 1. Head-down riveting studs--CSS-632-3, CSOS-M4-6; CSS has a 12-sided head, while CSSOS has a hexagonal head. All materials are SUS. Sunk studs are used for riveting thick materials; the minimum thickness for CSOS is 2.4, while that for CSS is 1.6. Therefore, this type of rivet is rarely used. Its length code is 1/16 for imperial units, rather than 1/32. 2. Rising-head rivet-type studs – KFB3-440-2, KFB3-632-24. These studs are of the flanged riveting type and are commonly used on PCBs; their length is indicated as L/32 inches or L in millimeters. These types of studs are also suitable for thick materials (1.27~1.65). 3. Ground-type rivet studs -- SOSG-6440-6, SOAG-3.5M3-8, SOSG-8632-10. SOxG-type studs are no longer indicated as non-through-hole types by adding a B before their code; only those that are longer than 12 millimeters are designed as blind-hole types. Its pre-punched diameter is the same as that of ordinary studs of type 1, and its length code is also L/32 inches or L millimeters. The minimum thickness of the riveting plate for this type of stud is 1.0 millimeter. The head of this type of stud features reamer-like sharp teeth, and it is designed specifically for connecting PC boards. 4. Double-headed studs: In the connector industry, the following double-headed studs are also used–DSOS-440-275, DSO-M3. Screws are required to be attached to both ends of this type of stud, and there are only two thread specifications available. DSOS is made of stainless steel, and it is quite commonly used ； DSO is ordinary carbon steel and is not very commonly used. Riveting studs are also widely used and found in many applications. For example, in the sheet metal industry, the metal sheets used for riveting. For example, they are used extensively in chassis and cabinets. Of course, it is also used in some electronic products, electrical products, mechanical products, etc.