Bolts are a kind of fasteners widely used in the mechanical field, mainly composed of a head and a threaded rod. The head of a bolt has various shapes, including hexagon head, countersunk head, and round head, to adapt to different operating spaces and installation requirements. The threaded rod is provided with external threads, which achieve a tight connection by cooperating with nuts or components with internal threads.
Bolts have a rich variety of specifications. From coarse-threaded to fine-threaded ones, they can meet different strength and precision requirements. In terms of materials, there are many options such as carbon steel, stainless steel, and alloy steel, which are respectively suitable for general mechanical connections, corrosive environments, and high-load working conditions.
In terms of applications, bolts are involved in almost all industrial fields. From daily furniture assembly to large-scale bridge construction and aerospace, they are indispensable. Bolts are key components that ensure the stability of various structures and equipment.
DIN444
Name
ISO, JIS, GB, ANSI, BSW, DIN or
non standard as customize
Grade 4.8,6.8,8.8,12.9,etc
Size
M3-M24 or made to print as
customer’s specification
Specifications
Various shape size according to
client’s requirement
Thread unc,unf,metric thread
Finish
Plain, Zinc
Plated(Clear/Blue/Yellow/Black), black oxide, H.D.G, DAC,GOEMET, as custom need
Grade 4.8,6.8,8.8,12.9,etc
DIN933
DIN 933 is a standard for full-threaded hexagon head bolts, which specifies technical requirements such as the size, tolerance, and mechanical properties of the bolts, and is commonly used for fastening connections in fields like machinery and construction.
GB901/stud bolt
The information of GB901 is as follows:
diameter: 6 8 10 12 14 16 18 20 24
length: 40 45 50
material: 304 316 carbon steel
thread form: Coarse thread and so on
surface finishing: natural coating black galvanizing Dacromet coating and so on
