Carbon Steel Flange Bolts

Product  introduction

Our carbon steel flange bolts are crafted from high-quality medium carbon steel, formed by hot forging and processed with quenching and tempering, endowing them with excellent mechanical properties and strong high-strength connection capabilities. With a tensile strength ranging from 800MPa to 1200MPa and stable yield strength, these bolts can withstand high-pressure and high-vibration working conditions, effectively preventing loosening and breakage, and ensuring the stability and tightness of flange connections.​

Available in various strength grades such as 4.8, 8.8, and 10.9, they meet different engineering requirements. Grade 4.8 is suitable for general civil construction and light equipment installation; Grade 8.8 is commonly used in industrial pipelines and machinery manufacturing; Grade 10.9 is capable of handling high-strength tasks in bridges, pressure vessels, and other scenarios. Thread sizes range from M6 to M48, and lengths vary from 10mm to 500mm, fitting various flange dimensions. Surface treatments like galvanizing and blackening are available to enhance rust resistance and extend service life.​

Widely applied in industries such as petrochemicals, power engineering, shipbuilding, and construction steel structures, our products are manufactured and tested in strict accordance with international standards like ISO and ASTM. With a professional after-sales team, we offer installation guidance, technical consultations, and other services, delivering reliable fastening solutions to customers worldwide.

Product information

Product name: Hexagon Flange Bolts

Grade: 4.8、8.8、 10.9、 12.9

Surface treatment：Black oxide、Galvanized、Dacromet etc.

Kind: Toothed、Untoothed

Material：Carbon steel

Specification: M6-M48

Standard: GB5787 GB5789 DIN6921