316 Stainless Steel Self Drilling Screws Grade 10.8 Machine Use ODM

Tornillo Stainless Steel Self Drilling Screw , Autoperforante De Cabeza Hexagonal

Quick Details:

Name: Tornillo Stainless Steel Self Drilling Screw , Autoperforante De Cabeza Hexagonal   

Material: 304 / 316 /201 Stainless Steel

Size: Customized   Length: Customized

Service: OEM, ODM Customer brand    Trade term: FOB/EXW/CIF

Certificate: ISO, GB, DIN 

Function: Screws fastener for Machine, building, industry, lamps ect.

Service: 24Hrs on line service

Products Description

Standard self-tapping screw identification characters, including symbols representing the shape of the thread and tail. Self-tapping screws have one or two characters representing threads to represent mechanical threads or wide threads (SPACED). For example, with the identifying character "B", it represents a wide threaded screw. Those without "B" represent mechanical threads, and the end represents characters to distinguish self-tapping screws as thread forming, cutting, rolling or self-drilling.

The mechanical thread has the same thread angle of 60 degrees as the Anglo-American unified thread and the same pitch of the thick and fine threads. If the screw is lost or necessary after disassembly, it can be replaced by a standard threaded fastener.

A wide thread has a thread angle of 60 degrees but its pitch is wider, and because of its wide pitch, its thread is steeper and its thread lead is larger than that of a mechanical thread. There is another kind of thread specially used on plastics, its thread angle is 48 degrees, commonly known as PT screw.

Thread forming self-tapping screws A, AB, B, BP, C and other types have been gradually replaced by thread-rolling self-tapping screws, so it is not recommended to use them in new designs. The difference between AB, B and BP is only in the shape of the tail. AB has a threaded tapered tail, B has a blunt tail, and BP has a non-threaded tapered tail. The center of the pointed tail enters the pre-drilled hole and begins to form the thread. Thread cutting self-tapping screws have BF, BP, D, F, G and T forms, BF, BP are wide threads, and the rest are mechanical threads.

The distinguishing character is the cutting tail. Each type of cutting tail has a shape that can collect scraps from the cutting. If the self-tapping screw is screwed into a blind hole (a hole that does not go through), its fragments will remain and be sealed at the bottom of the hole. However, if the through hole is tapped, the waste will fall on the other side of the workpiece. Therefore, this type of self-tapping screw must be considered when selecting this type of self-tapping screw. Scrap materials may cause pollution, fall into the running parts or make the electronic substrate inoperable.

All thread-rolled self-tapping screws are mechanical threads, which are the same as the Anglo-American unified thread coarse thread. Please refer to SAE J81 regulations. Please refer to SAE J1237 and DIN7500 regulations for metric threads.

Self-drilling self-tapping screws have two types of cutting wide thread BSD and mechanical thread CSD. There are also special thread types, including high and low double threads, and various tapping and drilling tails are also applicable. Due to the nature of tapping and threading, tail-drilling screws are not suitable for blind hole operations. When assembling a self-drilling screw, the drill tail must penetrate the workpiece completely before the thread can be cut or formed. Therefore, there will usually be some debris. If thread cutting threads are used, debris is unavoidable. Therefore, practical considerations must be made. This question. For BSD and CSD self-drilling screws, please refer to SAE J78 and DIN7504 (wide thread).

Tornillo Stainless Steel Self Drilling Screw , Autoperforante De Cabeza Hexagonal Parameters

Advantages

1. Exact forging standard of knife edge and high hardness of surface make it easy to drill.

2. Using the advanced technology to control the core hardness, avoiding rupture effectivity,

3. Quick self drilling , drilling , tapping, locking the oncce, and combining with the strength.

4. Save contruction time, improve working efficency.

5. Technology, professional manufacturing , quality assurance.

6. Our company have more than 15 years experience in the Stainless Steel Screws field.
7. We have Professional experienced engineers, sales and overseas engineers.