Bolts grade, strength distinction and tighteningStrength to distinguish4.85.66.87.68.810.912.9Minimum breaking strength40kg/mm250kg/mm260kg/mm270kg/mm2800kg/mm2100kg/mm2120kg/mm2The material45#35#40chromiumAlloy steel (hot)Chromium-molybdenum alloy steel (hot)Ni-cr-mo alloy steel (hot)Ni-cr-mo alloy

螺纹规格 Thread SpecificationM5M6M8M10M12M14M16M18M20M22M24p牙距 Tooth Spacing0.811.251.51.75222.52.52.53S对边 公称 Opposite Nominal810131719222427303236 K头厚 公称 Thick Head Nominal3.545.36.47.58.81011.512.51415

螺纹规格（D） Nominal Size,in.(D)牙数 Threads/ln. 应力截面积 Stress Area,Ain2.牙数 Threads/ln. 应力截面积 Stress Area,Ain2.牙数 Threads/ln. 应力截面积 Stress Area,Ain2.1/4 (0.250)200.0318 280.0364 5/16 (0.3125)180.0524 240.0580 3/18 (0.375)160.0775

The 2020 China (Jiaxing) Fastener Industry Expo will be held on October 28-30, 2020. The 2020 China (Jiaxing) Fastener Industry Expo (hereinafter referred to as "Jiaxing Fastener Expo") will be held at the Jiaxing International Convention and Exhibition Center in Zhejiang held with grandeur.Affected

Definition of thread: A thread is a shape with a uniform spiral protrusion on the outer or inner surface of a solid. Why use thread?Tightening and connection: suitable for most screw products at this stage.Transmission function (displacement function): such as a micrometer for QC to check the size.S