Materials, grades, standards, and application solutions for hexagon head bolts

Materials, grades, standards, and application solutions for hexagon head bolts

Hexagon head screws refer to the hexagon head mechanical plastic screws - complete teeth (metric system) with excellent insulation properties, non-magnetic, heat insulation, lightweight, individual materials of plastic screws also have high-temperature resistance, high strength, corrosion resistance, widely used in various industrial fields. Hexagon head bolts are common mechanical connectors widely used in mechanical equipment, vehicles, building structures, and other fields.

What are the materials of hexagon head bolts?

Hexagon head bolts are mainly made of carbon steel, stainless steel, copper, aluminum, titanium alloy, and other materials. The materials usually include carbon steel, alloy steel, stainless steel, and so on. Carbon steel is the most commonly used material, with high strength and rigidity, and is suitable for general mechanical equipment connectors. Alloy and stainless steel have higher strength and corrosion resistance, making them ideal for more demanding mechanical equipment and environments.

Carbon Steel: We distinguish low-carbon steel, medium-carbon steel, high-carbon steel, and alloy steel by the carbon content of the carbon steel material.

1. Low carbon steel: C% ≤ 0.25% domestic usually called A3 steel. Overseas, known as 1008, 1015, 1018, 1022, and so on, and mainly used for 4.8-grade bolts and four nuts, small screws, and other products without hardness requirements (Note: Drill screws mainly with 1022 material).

2. Medium carbon steel: 0.25%0.45%. The current market is not used.

3. Alloy steel: plain carbon steel into the alloying elements to increase some of the unique properties of steel, such as 35, 40 chromium molybdenum, SCM435, and 10B38. Fangsheng screws mainly use SCM435 chromium molybdenum alloy steel; the main components are C, Si, Mn, P, S, Cr, and Mo.

4. Stainless steel: performance level: 45, 50, 60, 70, 80 main points austenitic (18% Cr, 8% Ni) good heat resistance, corrosion resistance, and weldability. A1, a2, a4 martensite, 13% Cr corrosion resistance is poor, high strength, good wear resistance. c1, c2, c4 ferritic stainless steel. 18% Cr upsetting is better than the martensite, corrosion resistance. Currently, imported materials are mainly Japanese products on the market, according to the level of the main points SUS302, SUS304, SUS316.

5.Copper: commonly used materials for brass zinc-copper alloy. H62, H65, and H68 copper are mainly used as standard parts. Carbon steel products used in the disk element: serial number type of optional material 1 4.8 grade hexagonal screws 1008K 1010 1015K 2 6.8 grade hexagonal screws.

Hexagon head bolts are standard.

The standards for hexagon bolts are meticulously defined by ISO 4014,ISO 4016 ,DIN 931-2,DIN 7964 ,DIN 931,DIN 7964,DIN EN 3007,ASME/ANSI B 18.2.3.5M,ASME B 18.2.1,BS 4190. These standards leave no room for ambiguity, specifying thread sizes of M3~M64, A and B grade hexagon head bolts. A grade is used for bolts with D<=24 and L<=10D or L<=150mm (by smaller value); B grade is used for bolts with D>24 or L>10D or L>150 (by smaller value). Hexagon bolts size, hexagon bolts standard: DIN ANSI BS GB

Material: stainless steel or carbon steel

Diameter: 5mm～20mm,1/4″～3/4″.

Length: 8mm～200mm,5/16″～8″

Thread: Metric system, coarse thread, fine thread, inch system

Mechanical properties: 4.8,5.8,6.8,8.8,9.8,10.9,12.9

Surface treatment: natural color, galvanized, blackened, nickel plated, ROHS colored zinc, ROHS blue zinc, zinc-nickel alloy, Dacromet, phosphating, black zinc, etc.

Unlocking the Power of Hexagon Head Bolts: Understanding Performance Grades

Hexagon head bolt performance levels 3.6, 4.6, 4.8, 5.6, 6.8, 8.8, 9.8, 10.9, 12.9, and so on, more than ten grades, of which 8.8 and above bolts made of low-carbon alloy steel or medium-carbon steel and heat-treated (quenched, tempered), commonly known as high-strength bolts, and the rest of the widely known as ordinary bolts. Bolt performance level labeling has two parts of the digital composition: the nominal tensile strength of the bolt material value and the flexural strength ratio value. For example:

Performance level 4.6 grade bolts, the meaning of which is:

1. Nominal tensile strength of the bolt material up to 400MPa level;

2. Bolt material yield strength ratio of 0.6;

3. bolt material nominal yield strength up to 400 × 0.6 = 240MPa level performance grade 10.9 high-strength bolts, the material can be heat-treated:

4. Nominal tensile strength of the bolt material up to 1000MPa level;

5. Bolt material yield strength ratio of 0.9;

6. The nominal yield strength of the bolt material up to 1000 × 0.9 = 900MPa level bolt performance level of the meaning of the international standard, the same performance level of the bolt, regardless of the difference between its material and origin, its performance is the same, the design of only the performance level can be selected. Strength grades 8.8 and 10.9 refer to the bolt's shear stress levels of 8.8GPa and 10.9GPa.

High-Strength Steel Hex Head Screws with Phillips Drive: When clearance for a wrench is limited, these screws have a Phillips drive so that you can install them with a screwdriver. With a tensile strength of 160,000 psi, they are stronger than Grade 8 screws and can be used in high-stress applications, such as valves, pumps, motors, and automotive suspension systems. The cadmium plating provides good corrosion resistance to salt water. Screws meet NAS (National Aerospace Standards) specifications for material and construction. Length is measured from under the head.

Match the thread spacing of mating components. Coarse threads are the industry standard; choose these screws if you don’t know the threads per inch. Fine threads are closely spaced to prevent loosening from vibration.

Aluminum Hex Head Screws: Aluminum screws are one-third the weight of steel and have good corrosion resistance. Length is measured from under the head.

Screws that meet ISO (formerly DIN) or DIN comply with specifications for dimensional standards.

High-Strength Grade 8 Steel Flanged Hex Head Screws: Made from Grade 8 steel, these screws can be used in high-stress applications, such as valves, pumps, motors, and automotive suspension systems. They are at least 25% stronger than medium-strength steel screws. The flange distributes pressure where the screw meets the surface, eliminating the need for a separate washer. The material meets SAE J429 specifications for quality. Dimensions meet IFI 111 specifications. Grade 8 steel hex head screws are marked with six radial lines. Head height includes the flange. Length is measured from under the flange.

Black-phosphate steel screws are mildly corrosion-resistant in dry environments. Zinc yellow-chromate plated steel screws resist corrosion in wet environments.

Match the thread spacing of mating components. Coarse threads are the industry standard; choose these screws if you don’t know the threads per inch. Fine threads are closely spaced to prevent loosening from vibration. For high-quality High-Strength Steel Hex Head Screws with Material Certification Fastener and professional technical support, don't hesitate to contact us at adelajonly@gmail.com or visit our website at [Juxin Fasteners]: https://www.juxinfasteners.com.

Hexagon head bolts application industry

Hexagon head bolts, a versatile type of fastener, find extensive use in machinery, electronics, and construction, among other fields. Their wide application in diverse industries such as construction, aviation, and automobile underscores their importance and adaptability.

1. Construction industry: Hexagonal head bolts are widely used in the construction industry, such as steel structures, large machinery installations, bridge construction, and so on.

2. Aviation and automobile industry: Hexagon head bolts also play a very important role in the manufacture of aircraft and automobiles. They can be used as fasteners to connect various components, such as engines, wings, landing gear, etc. 3.

3. Manufacturing industry: Hexagon head bolts are often used as fasteners in the manufacturing field. They are widely used in the fields of machinery manufacturing, electrical appliances manufacturing, communication equipment manufacturing, and so on.

4. Other industries: In assembling various fields, hexagon head bolts also play a fastening role, such as furniture, sports equipment, doors, and windows. The primary role of hexagonal bolts is to tightly connect two or more objects, characterized by persistence, sealing, and reliability. When in use, it is necessary to choose the appropriate material and specification according to the weight of the connecting parts and the working environment and to install and tighten them correctly. When installing, the bolt should first pass through the hole of the connecting member. Then, the nut should be installed on the other side of the bolt and gradually tightened with a wrench or torque wrench until there is a slight elastic deformation between the bolt and the nut.

It is worth noting that hexagonal bolts may become loose, deformed, corroded, or have other problems during use. They need to be inspected and maintained regularly, and if problems occur, they should be replaced or repaired in time.

In short, hexagonal bolts are indispensable fasteners in the modern manufacturing industry, and their correct use and maintenance are crucial for ensuring the safe and stable operation of mechanical equipment.