High strength ASTM Double End Stud Bolt, High Strength Stud Bolt Double end stud bolt black Grade: SAE J429 Gr.2, 5,8; ASTM A307Gr.A, Class 4.8, 5.8, 6.8, 8.8, 10.9, 12.9 and etc. Material: Carbon Steel, Alloy Steel, Stainless Steel, Brass and etc. Standard: ASME B 18.2.1, IFI149,DIN931, DIN933, DIN558, DIN960, DIN961, DIN558, ISO4014, DIN912 and […]
Grade 8.8 Hex Bolt For Steel Structure
Alloy steel: 40Cr/42CrMo/B7/35CrMo
Other available standards: ASTM A325,ASTM A490
SIZE RANGE(Inch): Dia.: 1/2~1 1/2 Length:1 1/4~12
Dia.: M12~M36 Length:40mm~300mm
Normal finish: Black oxide, Dacromet, phosphating, Hot dip galvanized,etc.
Head Marking: accept customer
Certification: CE,SGS,ISO 9001
From raw materials to end product delivery, it has a strict control program. Accurate completion is done about:
Standard parts: wiring- roughing – annealing- pickling – drawing – heading(cold forging or hot forging) – threading(rolling) – heat treatment -surface treatment –cleaning –inspecting-packaging
Customization parts: heading, stamping or casting-wire cut edm machine -CNC (machining center) -grinder threading (rolling) – heat treatment -surface treatment –cleaning –inspecting-packaging.
Grade 8.8 Hex Bolt Perfect Quality:
We have strict quality control from producing to delivery. Our company had strong technology support. We have cultivated a group of managers who are familiar with product quality, good at modern concept of management.
Laboratory currently has the calliper, micrometer, depth and height gauge, thread gauge, plug and ring gauge, tension and torque gauge, hardness tester, salt spray tester, Film thickness tester, desktop direct- reading spectrometer, metallographic analyzer, carbon sulfur analyzer, multifunctional electrolysis thickness gauge, spectroscope, projector, hydraulic tensile tester, automatic screening machine, magnetic detection machines and a variety of specialized testing equipment.