GOST R 55742-2013 Cylinder head screwsScrews GOST R 55742-2013 – this product has a cylindrical head with an increased star-shaped angle, suitable for fastening one or more parts. Use will also require nuts (hex, square, or weld). The use of washers of different configurations (grovers, flat, etc.) will help to make the connection more reliable.
This standard specifies the characteristics of pan-head screws with an enlarged star-shaped socket wrench with threads from M5 to M20 inclusive for products of accuracy class A, property classes 8.8, 10.9 and 12.9.
Description of the design of the product and its features
The design of the screw consists of a cylindrical head with a star-shaped recess for a wrench and a cylindrical threaded rod. Products must be manufactured with accuracy class A and B.
Thread tolerance: 5g6g for strength class 12.9; for other strength classes: 6d
Accuracy class: A
Star-shaped recess designation of GOST R ISO 10664
The material of manufacture must have a strength class of 8.8, 10.9, 12.9.
Screws are coated with zinc, chromium, nickel, cadmium, etc. in our own electroplating workshop. A multilayer coating is also available, for example, copper-nickel (M.N.) or copper-nickel-chromium (M.N.X.6).
An example of designation GOST R 55742-2013: a screw with a cylindrical head and an enlarged star-shaped socket for a wrench, with M10 thread of nominal length I = 60 mm and strength class 10.9:
Cylinder head screw GOST 55742 – M10 x60-10.9
These screws are used in many industries. An increased demand for products, in particular, is observed in the aircraft and mechanical engineering industries, as well as in construction, energy and metalworking, where they are used for reliable fastening of parts and metal structures.
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