Overview
OST 23.2.2-79 Spring needle cotter pin is a fastener that is a metal rod of semicircular cross-section bent in half, with an eyelet formed at the bend. The straight part of this part enters the hole prepared for it in advance, and the bent part is snapped in several places.
Fastening group OST 23.2.2-79
OST 23.2.2-79 is mainly made of stainless steel and belongs to the group of stainless fasteners.
Materials of manufacture of cotter pin OST 23.2.2-79
- Steel, which can be additionally coated with zinc.
- Stainless steel, steel grades A2 and A4. This material does not require additional coating.
Areas of application of the D-shaped cotter pin
Such cotter pins are used in mechanical engineering as a more reliable way to fix nut connections. Its main task is to prevent self-tightening of fastening nuts in the assembly of various components.
The scope of application also directly depends on the material of manufacture and coating of the cotter pin:
- Zinc-coated steel is less susceptible to corrosion if OST 23.2.2-79 is to be used in an aggressive environment.
- Stainless steel. Steel grade A2 allows the use of OST 23.2.2-79 at significant temperature drops and in aggressive and humid environments.
