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  • China supplier for DIN 6914  High-Strength Hexagon Bolts With Large Widths Across Flats For Structural Bolting

    China supplier for DIN 6914 High-Strength Hexagon Bolts With Large Widths Across Flats For Structural Bolting

                          Material:Steel, Strength class 10.9 by DIN ISO 898-1 Thread Size M12 M16 M20 M22 M24 M27 M30 M36 d                 P Pitch 1.75 2 2.5 2.5 3 3 3.5 4 ds Nominal Size 12 16 20 22 24 27 30 36 max 12.7 16.7 2...
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  • How do we call each dimension on hexagon head bolt?

    How do we call each dimension on hexagon head bolt?

                          Legend: b – length of the thread (at least) l – length of bolt d – the nominal diameter of the thread k – head height r – radius e – the diameter of the circumscribed circle (not less...
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  • Ready stock ISO 4014 12.9 M64, M56, M42, M48, M36

    Ready stock ISO 4014 12.9 M64, M56, M42, M48, M36

    Product:hexagon head screws / half thread Specification:M20-M72 Property Class: ISO898-1  8.8, 10.9 Elongation after fracture Minimum tensile strength Lower yield strength or stress ar 0.2% non-proportional elongation Stress under proof load Strength under wedge loading Hardness Impact streng...
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  • Yulong Group awards 2021 advanced collectives and individuals

    Yulong Group awards 2021 advanced collectives and individuals

      According to the selection method of advanced collectives and advanced individuals of the group company, after the recommendation and selection of various units, Yulong Group recently commended the advanced collectives and advanced individuals for 2021.   There are “excellent employees...
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  • Ready stock ISO 4017 hex head bolt with high strength, Class 8.8 10.9 12.9

    Ready stock ISO 4017 hex head bolt with high strength, Class 8.8 10.9 12.9

    DIN EN ISO 4017 – 2001 Hexagon head screws — Product grades A and B DIN EN ISO 4017-2001 is a hes head bolt standard for dimensions, more details to check below information.  Half thread hex bolt standard is DIN EN ISO 4014. Bolts’ properties need to follow ISO 898-1. Anyang Longteng...
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  • DIN 933 vs ISO 4017

    DIN 933 vs ISO 4017

              DIN 933 Geman standard, ISO 4017 international standard, EN ISO 4014 European standard.  Differences are dimensions for s, e are a little different, ISO 4017 is smaller than DIN 933. Rest parts are same. Main differences are in M10, M12, M14, M22 Mechanical pro...
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  • Hex head bolt DIN933

    Hex head bolt DIN933

    Hex head bolt can be divided as full thread hex bolt DIN933 and half-thread hex bolt DIN931. DIN933 hexagon bolt is similar to ISO4017 and GB/T 5783.     DIN933 is a bolt standarding for fully threaded hex bolt with thread diameter M1.6 ~M52, product grade: Grade A, Grade B.  Grade A,...
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  • Poverty alleviation received a pennant and praised

    Poverty alleviation received a pennant and praised

    On December 31, 2021, Feng Bo, General Manager of Anyang Longteng Heat Treatment Material Co.,Ltd and a party of 6 representatives visited Dongjiaokou Village, Duli Town, Yindu District, and brought them the care and warmth of the support unit. The secretary of Dongjiaokou Village and the main re...
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  • GB/T 5782 black oxide hex 8.8 grade bolt specification

    GB/T 5782 black oxide hex 8.8 grade bolt specification

    Product:hexagon head screws / half thread Specification:M20-M72 Property Class: ISO898-1  8.8, 10.9 Elongation after fracture Minimum tensile strength Lower yield strength or stress ar 0.2% non-proportional elongation Stress under proof load Strength under wedge loading Hardness Impact strength...
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  • Screw Thread Tolerances, According to ISO 965

    Screw Thread Tolerances, According to ISO 965

    Anyang Longteng thread tolerance standard, according to ISO 965, or GB/T 197-2003   This standard tolerance apply to all our thread steel bars, for example, wind turbine foundation anchor bolt, roof support bolt,high duty stud bolt, steel tie rod. More information for threaded bars, or if n...
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  • Anchor Bolt Thread Rolling Process

    Anchor Bolt Thread Rolling Process

    wind turbine foundation cage, anchor bolt Thread rolling operation process: Rolling thread into requested length according to drawings, and measure the length by regular rules piece by piece. Make sure 100% qualified. thread production standard according to GB/T 196-2003 General Purpose Metric ...
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  • EN 14399 bolt for wind turbines HR HV system

    EN 14399 bolt for wind turbines HR HV system

    EN14399 Product:High-strength structural bolting assemblies for preloading This standard on structural bolting reflects the situation in Europe where two technical solutions exist to achieve the necessary ductility of bolt/nut/washer assemblies. These solutions utilize different systems(HR and H...
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  • ISO 4032 hex nut grade8 10 CE

    ISO 4032 hex nut grade8 10 CE

    Product:hexagon nuts Mechanical properties according to ISO898-2  8  10 Thread tolerance:6g,6e,6h Dimension tolerance:ISO 4759-1 Surface quality:ISO 6157-2 Quality management systems: ISO9001   We provide ISO 4014/4017 bolt
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  • EN15048 hex head bolt CE certificate

    EN15048 hex head bolt CE certificate

    EN 15048-1 PRODUCTS:Non-preloaded structural bolting assemblies Bolts grade: 8.8  10.9 Nuts grade: 8  10 Washer hardness class: HV100, HV200, HV300 Thread size: M20-M72 Mechanical Properties meet ISO898-1, CL 8.8 10.9  Elongation after fracture   Minimum tensile strength Lower yield strength or...
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  • ISO 4014 hexagon head screws, supplier from China

    ISO 4014 hexagon head screws, supplier from China

    Product:hexagon head screws / half thread Specification:M20-M72 Property Class: ISO898-1  8.8, 10.9 Elongation after fracture Minimum tensile strength Lower yield strength or stress ar 0.2% non-proportional elongation Stress under proof load Strength under wedge loading Hardness Impact strength...
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  • The key technology of anti-impact prestressed support for coal mine roadway won the 2020 National Science and Technology Award

    The key technology of anti-impact prestressed support for coal mine roadway won the 2020 National Science and Technology Award

    On November 3, the Party Central Committee and the State Council solemnly held the 2020 National Science and Technology Awards Conference in the Great Hall of the People in Beijing. The project completed by Anyang Longteng Heat Treatment Material Co., Ltd. won the National Technical Invention Awa...
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  • Hexagon head screw ISO 4017, CE, DOP, full thread

    Hexagon head screw ISO 4017, CE, DOP, full thread

    Product:hexagon head screws / full thread  Specification:M20-M72 Property Class: ISO898-1  8.8, 10.9 Elongation after fracture   Minimum tensile strength Lower yield strength or stress ar 0.2% non-proportional elongation Stress under proof load Strength under wedge loading Hardness Impact stren...
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  • The 21st Suzhou Fasteners and Technology Exhibition

    The 21st Suzhou Fasteners and Technology Exhibition

                          The 21st Suzhou Fasteners and Technology Exhibition, time: October 27-29, 2021, location: Suzhou International Expo Center   Anyang Longteng Heat Treatment Material Co.,Ltd established in 19th Jan. 2005, with mor...
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  • Production License of Special Equipment People’s republic of China

    Production License of Special Equipment People’s republic of China

    On October 23, 2021, there was good news from the State Administration of Market Supervision: The company successfully passed the evaluation of the additional item of pressure piping component manufacturing, and obtained the special equipment production license of the People’s Republic of China (...
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  • 2021 Beijing International Wind Energy Exhibition

    2021 Beijing International Wind Energy Exhibition

    Anyang Longteng Heat Treatment Material Co., Ltd. We sincerely invite you to visit 2021.10.18—2021.10.20 2021 Beijing International Wind Energy Exhibition  COMPANY PROFILES Anyang Longteng Heat Treatment Material Co., Ltd. (formerly Anyang Longteng Special Steel Manufacturing Co., Ltd....
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  • Wind power big size hex bolts CE EN 14399-4 M48*210 10.9 HV bolt tornillo

    Wind power big size hex bolts CE EN 14399-4 M48*210 10.9 HV bolt tornillo

                      We are CE certified manufacturer producing high strength bolt assembly. EN14399-1 EN 14399-4 are availabe from HV M20-M64, grade 12.9, 10.9, 8.8. High-strength structural bolting assemblies for preloading – HV system Threaded a...
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  • Wind Turbine Blade stud bolt assembly – Anyang Longteng

    Wind Turbine Blade stud bolt assembly – Anyang Longteng

      Blade bolts are one of other fasteners and connectors. Dedicated to the transmission and connection of wind power equipment. Product specifications: M33×128 M30×428; material: B7, 10.9; runout degree of screw hole center to plane <0.02mm; bolt straightness <0.05mm; mechanical proper...
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  • Class 12.9 bolts Strength

    Class 12.9 bolts Strength

    According to ISO 898-1, Mechanical pr physical property for class 12.9 is as below: Tensile strength min 1220 MPa Stress at 0.2% non-proportional elongation, Rp0.2, min 1100 MPa Stress under proof load, 970MPa percentage elongation of area after fracture for machined test pieces, A,  8% Percentag...
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  • Why do bolts have 4.8/8.8/10.9/12.9 grades?

    Why do bolts have 4.8/8.8/10.9/12.9 grades?

    Take the 10.9 level as an example: 10 represents the nominal tensile strength (1000MPa), and 9 represents the yield strength ratio (0.9). The rest can be deduced by analogy. No other grades are currently seen, and grade 12.9 is relatively rare. The materials used for grade 8.8 and 10.9 are 42CrMo...
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