Cotter Pin A4

Cotter pin A4 is a fastener made of stainless steel wire.

The blank is bent in half so that a loop or a T-shaped bridge forms at the bend point. A separate variety is spring (hairpin) cotter pins.

3% molybdenum in the austenitic steel composition increases resistance to corrosion and aggressive environments. High strength characteristics and durability make the use of A4 cotter pins economically justified, with a virtually unlimited service life.

Cotter pin A4 is used in joints where it is necessary to increase connection strength and prevent bolts from spontaneously loosening due to vibration or wear. Such fasteners simplify and speed up installation, ensure the reliability of parts under operating loads, and are used to secure rotating mechanisms. Used in industry and construction.