What are the standard screws and nuts available in the market? What are the specifications?

There are countless standard parts in the market now, and there will be any standard screws if you want to buy any standard screws.

Let's talk about screws first. Screws are a general term in the industry, which generally includes screws and bolts.

There are many standards for screws in the market: DIN912(GB7-85)

hexagon socket head cap screws,

Its minimum specification can reach M2. Thread length is not limited) For example, M25

M3

M4

M5

M6

M8

M1

M12

M14 and so on (the length is not limited)

By the way, I'm telling you about the specifications of the screw and what it is made of: it is made of screw threads. Let me take the above data as an example. For example, the professional standard name of the smallest M2 is M2-.4X5(M2 is the length of the threaded rod, .4 is the thread pitch, and 5 is the diameter of the threaded rod). Generally, their materials are: 4.8

8.8

1.9

12.9 and so on. There are stainless steel, S4

S16, etc.

standards for screws include:

DIN7991 (hexagon socket countersunk head screw)

DIN913 (flat head hexagon socket fastening)

DIN914 (pointed hexagon socket fastening)

din 915 (column end hexagon socket fastening)

DIN916

(concave end hexagon socket fastening). Bolts

DIN933 (external hexagon bolt)

DIN6921 (hexagon flange bolt)

DIN261(T-bolt) and so on, so I won't describe them one by one. These standards can refer to the above description.

There are nuts, and there are many standards for nuts.

For example, there are:

DIN934 (this is a common nut, hexagonal nut)

DIN928 (four-corner welded nut)

DIN929 (hexagonal welded nut)

DIN439 (this is similar to DIN934, but the size is not the same.

the specifications of nuts are different from those of screws, so take DIN934 as an example. Its minimum can reach M2, M25

M3

M4

M5

M6

M8

M1

M12

M16

M2

M24, etc. The specifications of the nut are composed of: the inner diameter of the nut and the thread of the nut, for example, B. .5 is the thread of the nut)

For example:

m3-5

M4-.7

M5-.8

M6-1.

M8-1.25

M1-1.5

M12-1.75

.

I hope I can help you!

above? M2-.4X5(M2 is the length of the threaded rod, .4 is the thread pitch and 5 is the diameter of the threaded rod)? Is it wrong? M2-.4X5(M2 is the diameter of the threaded rod, .4 is the thread pitch, and 5 is the length of the threaded rod)? That's right, you're all wrong, dizzy! ! !