Q:The Symbolic Meaning of Screw

The symbolic meaning of the screw is generally refers to Lei Feng's "screw spirit", is consciously put the individual into the cause of the party and the people, the individual obey the whole, obey the organization, loyal to duty, work conscientiously, do a line of love, and serve the people wholeheartedly the spirit of.

Q:The idiom of the screw

Meaning modesty, that their own small insignificant, insignificant but indispensable.

Q:Nominal diameter 12 washers, outside diameter?

due to the material and craft limits to threaded fasteners, bolts and other fasteners supporting surface is not big, therefore to reduce the pressure on the surface compressive stress protection by fitting of surface, it adopts the washer.In order to prevent the loose connection vice with locking spring washer and more tooth lock washer, round nut and lock washer with saddle, waveform, conical spring washer.

Q:What is the role of flat washers? There is a friend who can introduce

Flat washer is generally used in the connecting piece is a soft texture, a hard brittle, its main role is to increase the contact area, pressure distribution, to prevent the soft texture of the crush.2 parts between the connecting piece and the nut. A flat metal ring is generally used to protect the surface of the connecting piece from the nut.3 flat pad is to increase the contact area, and to prevent the bolt and workpiece friction;The main function of the 4 flat washer is to protect the surface of the connector, to prevent the bolt nut tightening when the workpiece surface

Q:What does the screw m4x6 mean?

Diameter 4mm length 6mm (just the length of the thread)

Q:what parts do Fasteners include

nut: with a threaded hole, the shape was generally flat hexagonal cylindrical, there are flat square or flat cylindrical

Q:A general set of screws have a few nuts, bolts, washers?

Different bolt standards have different supporting methods, such as GB1228 big six angle a set of bolts contains 1 bolts a nut, and the gasket, and the shear bolt type is the 1 set of the bolts of a nut, the 1 gasket 1

Q:Will the stainless steel fastening standard parts of the national standard code and name?

Because the fastener is a standard part, so the size of stainless steel fasteners and ordinary fastener size is the same, other standard GB / T 5267.4-2009 fastener surface treatment corrosion-resistant stainless steel passivation treatment

Q:how much Specification for washers

Conventional M3-M130, there is a "SP" large outer diameter M8-M36, in general, large diameter washers used for long hole or flange nut assembly

Q:What is a self-tapping nail? Is it used? What are the characteristics of the shape? What is the difference with ordinary screws?

Self-tapping screws are in the metal or non-metallic materials in the pre-drilling in the self-drilling with a threaded thread with a threaded fastener. Self-tapping screws with high tension, single, unilateral combination of features. Self-tapping screws are used for connection between thin metal plates (steel plates, saw boards, etc.). When connecting, first thread the bottom of the connector, and then screw the tapping screw into the threaded bottom hole of the connected part. As the tapping screw thread surface has a high hardness (≥ 45HRC), can be connected to the threaded bottom hole in the internal thread, thus forming a connection.