Astm A193 B7 Hex alloy steel A320 L7 L7m Stud Bolt SS 317L Fastener
ASTM A320 Grade L7 is a material specification for bolts, studs, nuts, and other fasteners designed for high temperature bolting applications. ASTM A320 L7 grades are divided into 4 performance classes, A, B, C, and D, each with different tensile and stress rupture properties. Class 660 fasteners are used to bolt boilers, pressure vessels, pipe flanges and valves for high temperature service.
Type “Stud Bolt
Hex Bolt £¨full thread£¬partial thread)
Thread Rod
U-Bolt U
Hex Socket Cap Screw
Hex Nut
Flat Washer
Spring Washer ”
Size DIN£ºStud Bolt £ºM6~M100 £¬Hex Bolt £ºM6~M64
ASME£ºStud Bolt£º1/4″~5″£¬ Hex Bolt £º1/2″~2 1/2″
Finish Cold galvanizing ,Hot-dip Galvanizing ,PTFE ,Zinc Nickel ,Black coating ,Plain
Producing Standard ASME £ºASME B18.2.1
ASME B18.2.2
ASME B18.22.1 Plain Washer
DIN£ºDIN931 Hex Bolt with partial thread
DIN 933 Hex Bolt with full thread
DIN 912 Hex Socket Cap Screw
DIN 934 Hex Nut
DIN 125 Plain Washer
DIN127 Spring Washer
DIN 975 Threaded Rods
DIN 976 Stud Bolts
DN 3570 U-Bolt
Material Grade Alloy Steel: A193 B7 ,A194 2H , A320 L7,L23M