Production process for heat-treated hex head bolt

                                              -Anyang Longteng Heat Treatment Material Co.,Ltd

• Raw material retest

• Pealling(larger than M20) / drawing(smaller than M20)

• Cutting

• Chamfering

• Hot-forged

• Chamfering hex head

• Heat-treatment

• Lathing

• Thread Rolling

• NDT test

• Degreasing

• Sand blasting

• Corrosion protection (coating)

• Packaging

 Note: Above process only apply in Anyang Longteng Heat Treatment Material Co.,Ltd. Different drawings from customer may need changes in production process. If need further information or have any questions, contact infor@aylttg.com, Ms. Cora Tsao.