What is the bolt hexagonal head?
bolt hexagonal head is a hexagon type external screw fastener, designed to rotate with the spanner.
Application field of bolt hexagonal head:
agricultural machinery bolts: tractor, seeder, harvesting machinery, etc.
heavy mining machinery bolts: metallurgical machinery, mining machinery, lifting machinery, loading and unloading machinery, industrial and mining vehicles, cement equipment, kiln equipment, etc.
engineering machinery bolts: forklift, shovel soil transport machinery, compaction machinery, concrete machinery, etc.
general mechanical bolts for petrochemical industry: petroleum drilling and production machinery, refining machinery, chemical machinery, pumps, fans, valves, gas compressors, refrigeration and air conditioning machinery, paper-making machinery, printing machinery, plastic processing machinery, pharmaceutical machinery, etc.
electrical and mechanical bolts: power generation machinery, transformer, motor, high and low voltage switch, wire and cable, battery, welding machine, household appliances, etc.
machine bolt: metal cutting machine, forging and pressing machine, casting machine, woodworking machinery, etc.
automobile bolts: truck, highway bus, car, automobile modification, motorcycle, etc.
packing machinery bolts: packing machine, packing machine, conveyor, etc.
environmental protection machinery bolts: water pollution prevention and control equipment, air pollution prevention equipment, solid waste treatment equipment, etc.
Bolt hexagonal head material
At present, the hexagon screws in the market mainly include carbon steel bolts, stainless steel bolts, and copper bolts.
Carbon steel.
1008,1015,1018,1022, etc. Mainly used for bolts of grade 4.8
Alloy steel
Add alloy elements to ordinary carbon steel, and increase some special properties of steel: such as 35K,45K,40CrMo, SCM435, 10b38.
Stainless steel.
Performance grade: 45, 50, 60, 70, 80 mainly divided into austenite (18% Cr, 8% Ni) has good heat resistance, good corrosion resistance, and weldability. A1, A2, A4 martensite, and 13% Cr have poor corrosion resistance, high strength, and good wear resistance. C1, C2, C4 ferritic stainless steel. 18% Cr has better upsetting property and stronger corrosion resistance than martensite. At present, the imported materials are mainly Japanese products. According to the level, it is mainly divided into sus3204, SUS316.
Copper.
The common materials are brass, zinc, and copper alloy. In the market, H62, H65, and H68 copper are mainly used as standard parts.
Standard for hexagon head bolts
The standard for hexagon bolts: DIN ANSI BS
Dimensions of hexagon bolts
Diameter: 5mm-20mm, 1 / 4 ″ to 3 / 4 ″
Length: 8mm-200mm, 5/16 ″ to 8 ″
Thread: metric, coarse, fine, British
Grade: 4.8, 5.8, 6.8, 8.8, 9.8, 10.9, 12.9
Surface treatment: natural color, zinc plated, blackened, nickel-plated