3TY-02 type E type bolt, the original main engine factory is Northwest Benniu (Ningxia Dibenniu, Northwest Coal Machine Factory), equipped with 3TY-01 type scraper, 113S-01 scraper, is the Northwest Benniu 764 scraper The commonly used E-type bolt drawing number has a total length of about 280mm, a center distance of 130mm, and a weight of about 3.2KG. The commonly used material is 45 steel. It can also be customized according to customer requirements.