Metric Heavy Hex Head Structural Bolt, ASTM A325 A490 Heavy Hex Bolts, Hot dip galvanized 8.8 heavy hex bolt for electric equipment Finish: ZINC, Plain Material: Steel, carbon steel Standard: DIN FINISHED: Black,ZINC HDG,Dacroment. PLAIN SIZE: M45,M4,M12 M72,M56 M3.5 LENGTH: 60MM-300MM GRADE: 4.8,6.8 8.8 10.9 TYPE: hexagon bolt customized Certificate: ISO9001 Metric Heavy Hex Head […]
DIN931 Black Heavy Hex Bolt
Material: Stainless steel 303/304/316/316L,Carbon Steel,Alloy Steel Brass,Bronze,Aluminum.
Surface: Bronze, Zinc, Rainbow, Plain, Nickle, Passivated, Electrophoresis, Dacromet, Chrome plated.
Head Type: Pan,Binding,Cheese,Truss,Flat,Oval,Round,Fillister, (Trim) Hexagon (Socket Cap), Lotus, Square.
Drive Type: Slotted(Socket), Square, Pz, Philips, Triangle, H, Torx(Pin), Rri-Wing, Lr, Sing Way.
Heat Treatment: Tempering,Hardening,Stress Relieving,etc.
Available Sizes: M1.6,M2,M2.5,M3,M3.5,M4,M5,M6,M8,M10-M20
Standard: GB,JIS,ANSI,DIN,BS,ISO,Sample is free but freight charge is under cost.
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.
Perfect Quality in DIN931 Black Heavy Hex Bolt:
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.
We aslo can provide series control plan document, such as incoming material quality control(IQC), in-process quality control(IPQC), statistical process control(SPC), final QC(FQC), Faliure mode & effect analysis (FMEA), PPAP.
We will respond to you within 24 hours. We can manufacture nonstandard parts according to your drawings. And we will continue to serve you after sales and will be responsible for the mistakes from us.