High Strength Grade Class 4.8 8.8 Carbon Steel Metal bolt Square Head Bolt Zinc plated

Product Specifications

Name	Metal Bolt
Standard	DIN, ASME, ANSI, ISO
Material	carbon steel
Place of Origin	China
Finish	Polish, Passivation, Black, Galvanization, Chromate, Dacromet
Certificate	ISO9001:2008, ROHS
Used	Building Industry Machinery
Thread Type	Coarse, Fine
Usage	Fastening
Function	Connection, Fastening and Decoration
Strength	High
Size	Various sizes available
Measurement System	INCH, Metric system

Square head bolts (square head screws) are essential fasteners across industries. Their defining feature is the square - shaped head, which delivers practical advantages. Material - wise, they can be fabricated from diverse metals; stainless steel variants (such as 18 - 8 (A2), A4, SUS304, SUS316, SUS316L) are highly favored for their superior corrosion resistance, enabling use in harsh settings like marine or chemical facilities. In coastal regions with high saltwater exposure, these bolts withstand corrosion and retain structural integrity. The square - head geometry enables straightforward manual tightening/loosening via wrenches or sockets. Unlike round - headed bolts that may slip under torque, the flat square - head surface ensures a stable grip, simplifying installation and maintenance—especially in confined spaces or when power tools are inaccessible. Available in sizes like M2, M8, M12, M16 and strength ratings (e.g., A2 - 70, A2 - 80, A4 - 70, A4 - 80), they meet specific load demands. High - strength square head bolts are frequently employed in structural applications (e.g., buildingames, heavy fr- machinery assembly) to guarantee structural stability and safety.

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