GOST 11871-88 Schlitzmutter

 GOST 11871-88 A spline nut is a nut used to fix coaxial parts on shafts, such as bearings, bushings, ball bearings and other rotating parts. Usually they are lower and smaller in external parameters than standard hex nuts, but they are often used on large shafts, so a design was invented in which they can be tightened with a special wrench that is smaller than a regular open-end wrench of the corresponding nut diameter. The wrench clings to one of the nut's splines with a special tooth and, bending around its body, rests against it, making it possible to apply force when turning it.

Fastening group of GOST 11871-88

     Nuts of GOST 11871-88 are most often made of stainless steel and belong to the stainless fasteners group.

Materials for manufacturing nuts of GOST 11871-88

     Nuts of GOST 11871-88 are made of the following materials: 

• Steel, hardness class 14H
• Stainless steel, grade A2. Strength class A2 allows the use of bolts at significant temperature changes and in aggressive and humid environments.

Application range of GOST 11871-88 nuts

     Nuts of GOST 11871-88 are widely used in the machine-building industry. The main function of these nuts is to fasten bearings to the shaft and ensure their reliable fixation. Even if the connection is subjected to constant vibration and dynamic loads, it remains strong and can withstand any impact. 

     GOST 11871-88 is directly used on machine tool assemblies, in cars on shock absorbers, in bicycle assemblies, on photographic lenses, etc.