C&N offers high quality of PTFE Coated stud bolt,PTFE Coated STUD BOLT A193 B7 with 2 NUTS A194 2H, ESPARRAGOS STUD BOLT A193 Grado B7 w/2 NUTS A194 2H stud bolts A193 B7 material according to ASTM A193/A193M ,Thread as per ASME B1.1, 2A For the Hex Nuts A194 2H,material according to ASTM A194 ,Threas as per ASME B1.1, 2B