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

A194 American standard I know is the US system, but now do not understand is GR3 in the end is what it means

Q:High-strength screw standard parts of the quality of what data

High strength bolts are used for connecting bridges, rails, high pressure and ultrahigh pressure equipment.

Q:Does the fastener include screws?

It usually includes the following types of parts

Q:What is the name of the screw (fastener)?

By hole type: a. Through hole b. Blind hole Material: a. Iron (Fe) b. Aluminum (Al) c. Stainless steel (sus)By color: a. Colorful (character) b. Blue zinc c. Black zinc

Q:What are all the fasteners?

Under the national standard 13 categories: are studs, nuts, screws, bolts, washers, retaining rings, pins, wood screws, tapping screws, rivets, welding nails, assemblies and connecting vice, innovative and non-standard products

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

True color refers to the surface of the fastener is not any treatment, copper is copper color, iron is the color of iron, aluminum is the color of aluminum. Galvanized iron is the surface of the fastener coated with a layer of zinc, the role is rust. Oxidation refers to the surface of the fastener to the chemical reaction, to produce a layer of anti-rust film, the main role is rust, the other can also beautify the appearance.

Q:What fasteners are manufacturers in China?

(11) Ningbo Ningli high-strength fasteners Ltd.(12) Ningbo Donggang Fastener Manufacturing Co., Ltd.