Anyang Longteng Heat Treatmentδ™ Material Co.,Ltd of≤☆Ωfers high tensile, high impact©©>® performance alloy steel 414∏♦♣0 Fasteners including bolt♥δs, screws, stud bolts, full threaded r αods, hex bolts, nuts and washers. AIS♥•♣βI 4140 is high strength chro>​ mium molybdennum alloy steel grade used↔  for producing A193 B7€₽¥σ, B7M, A320 L7, L7M faσ$steners for low tempera£"&ture bolting applicatio±σ>♦ns. 

Anyang Longteng major produce st₹→ud bolts, fully thread bolts, d ₹>ouble head bolts, hex head bolts, rou✘✔σnd head bolts, anchor bolts in AΩ✘δΩISI 4140 alloy steel.