Threadbar Bolt na-eji ebe mgbakwasa ma ọ bụ mkpuchi zuru oke n'elu ụlọ na ngwa bolting, yana profaịlụ elu ya nwere ribbed, eriri eriri nwere ike inye mixing resin na mbufe ibu.A na-ejikwa ya n'ọtụtụ ebe maka nkwado ala na Ngwuputa, ọwara na ọrụ mkpọda