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 […]
ASTM Heavy Hex Structural Bolt
Material: 45# steel, 4OCr, 35crMoA, 40MnB, 40MnVB and other alloy steel
Color: white, blue, yellow, black, OEM
Standard: DIN, ISO, ANSI, BS, JIS
Grade: 8.8, 10.9 and 12.9
Diameter: M10-M48, 3/8-2″
Finishing: zinc plate (white, blue, yellow, black), Cr3+, black oxide, Ni plate, brass plate, electrophoresis, dacromet, hot-dipped galvanized, etc.
The Most Precise Tolerances ASTM Heavy Hex Structural Bolt
1) Shaft diameter below 6 mm and maximum pore size tolerance up to 0.003 mm
2) Shaft diameter larger than 6 mm and pore size tolerance is 0.005 mm
3) Linearity below 100 mm distance etc, tolerance is up to 0.005 mm
4) 100 mm or more distance linear tolerance is up to 0.01 mm
5) A form tolerance is up to 0.003 – 0.005 mm
6) Position tolerance is up to 0.01 mm
1) CNC Machining Center
2) CNC Lathe
3) CNC Milling Machine
4) Precision Cutting Machine
Various Bolts, Screws, Studs(Threaded rods), Nuts, Non standard Products, Casting parts, etc.
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.
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.