GOST 13438-68 Spherical or ball washer is a hardware product designed to fasten structural elements in non-parallel surfaces. There are three types of shapes - C (curved), D and G (concave). They are most popular in mechanical engineering and instrumentation.
Fastener group of GOST 13438-68
Washers of GOST 13438-68 are most often made of stainless steel and belong to the stainless fasteners group.
Materials for the manufacture of GOST 13438-68 washers
GOST 13438-68 Spherical washers are made of the following materials:
- Steel, which can be additionally coated with zinc. Zinc (Plated) protects against corrosion if the fastener is to be used in aggressive environments.
- Stainless steel grades A2 and A4. Steel grade A2-80 allows the fasteners to be used at significant temperature fluctuations and in aggressive and humid environments.
Application range of washers according to GOST 13438-68
Spherical washers and tapered sockets of GOST 13438-68 are used when clamping elements need to adapt to non-parallel surfaces.
Spherical washers and conical (ball) sockets of GOST 13438-68 are parts for machine tools designed to clamp components with non-parallel planes. They can be used in construction and machine building to fasten structural elements whose planes are not parallel. They are used with metric rods and nuts. They are made of high hardness carbon steel, uncoated or galvanized.
