About us
Sadra Alborz Equipment Trading and Production Company (Privately held) started its activities since 2006 with the aim of supplying, producing and distributing all kinds of special industrial, automotive and… nuts and bolts. The company is attempting to do the best by employing the most expert and
experienced managers and staff, consulting with some European and Asian reputable companies and using automatic cold forging machine. One of our goals is improving our brand by producing diverse fasteners according to the existing standards which can compete with the best foreign products in order to provide a part of the domestic requirements of our country, Iran.
Depending on the type of use, screws are usually made of low-carbon iron class 4.6 and 5.6, high carbon iron class 8.8 and above, steel and titanium. Each of these materials has its own advantages and disadvantages, which give the screw a unique feature for special use. In general, steel and galvanized screws are a good choice for humid regions or acidic and corrosive environmental conditions due to their high resistance to rust and corrosion. The grade or class of bolts and nuts is the most important factor in determining tensile stress, shear stress, torsion, and actually physical and intrinsic properties of bolts, and in fact, what is stated in engineering handbooks for choosing bolts and nuts is usually more related to Dimensional characteristics of nuts and bolts.
