Q:Our company to purchase a number of fasteners to see when the CAD drawings in the technical requirements I do not know the specific to write those content

1, the product used by the material (the available material is too much to see what your company to ask) 2, the accuracy of the thread (bolt type of external thread is generally 6g, nut class internal thread is generally 6h) 3, surface treatment Stainless steel materials generally do not do treatment, carbon steel, color, galvanized, Dacromet, nickel, chrome, etc.) 4, product tolerances before the surface treatment or surface treatment of the above is the standard parts of the standard, But also depends on the actual use, we must deal with the landlord.

Q:For the commonly used standard parts, for some of the quality of good or bad, how to distinguish,

According to the relevant standards, such as size, appearance, thread quality, surface finish, through the rules, hardness, etc., should be considered, according to the standard about.

Q:Who include who btween them?

Some people have a national (industry) standard type of fasteners called standard fasteners, referred to as standard parts.

Q:A194 GR3 is what style fasteners

GR3 is GRADE 3 abbreviation, A194 GR3 is carbon steel red or cold beat nut, the minimum tempering temperature of 565 degrees. High pressure and high temperature conditions with the bolt alloy steel nut.

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:Who is the information on fasteners ah?

Testing equipment machinery, various parts and related technical equipment. And screw mold.

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:Are there categories of fasteners classified by material?

According to the use of different materials, fasteners are divided into carbon structural steel fasteners, alloy structural steel fasteners, stainless steel fasteners, high temperature alloy fasteners, aluminum alloy fasteners, titanium fasteners, titanium Niobium alloy fasteners and non-metallic fasteners.

Q:The main meaning is that the design to make some specific requirements to achieve consistency.

Referred to the selection must be selected in the national standard parts, otherwise the changeability does not exist. Speaking of norms nothing less than the following: function according to national standards (strength, rust, shape ....);

Q:Fasteners often say that the nature of galvanized oxidation is what it means

True color means that the surface of the fastener is not treated. Galvanized refers to non-zinc easily oxidized metal fastener surface coated with a layer of zinc, the role is to prevent its rust. Oxidation refers to the surface of the metal fastener through a chemical reaction to produce a layer of rust-proof film, the main role is rust, the other can also beautify the appearance.