ASTM A563 Gr DH Heavy Hex Nuts

Ningbo Haixin specializes in the production of all kinds of high strength fasteners. ASTM A563 Gr DH heavy hex nuts are the typical products of them. Based firmly on the ISO9001 quality system, our factory operates each link from raw material to the production process in strict accordance with the procedures. And as a direct sales factory, we can offer the best price and delivery for you. To choose ASTM A563 Gr DH heavy hex nuts from Ningbo Haixin is to choose safety, quality and success. We warmly welcome customers at home and abroad for business cooperation.

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Product Description

ASTM A563 is the standard for carbon and alloy steel nuts. This standard covers chemical and mechanical requirements for ASTM A563 Gr DH heavy hex nuts. Our factory has 27 years of production experience in the fasteners industry. We target quality, security and efficiency in our daily work. They are standards, processes, records, inspections, supervisions and training for every key process in order to form the quality chain in our operations. Ningbo Haixin can offer perfect fastening solutions to meet your various requirements and demands.

Product Parameter (Specification)

Dimension	Grade	Diameter	Surface
ASME/ANSI	ASTMA563 Gr.A	3/8”-4”	Plain
B18.2.2	ASTMA563 Gr.B		Zinc Plating
	ASTMA563 Gr.C		HDG
	ASTMA563 Gr.DH

Product Features

Heat treatment is the most critical process for high strength nuts. Grade DH heavy hex nuts shall be heat treated by quenching in a liquid medium from a temperature above the transformation temperature and tempering at a temperature of at least 800. ASTM A563 Gr DH heavy hex nuts shall be marked with the grade DH and a symbol to identify the manufacturer. Marks for ASTM A563 Gr DH heavy hex nuts may be raised or depressed at the option of the manufacturer and customer. However, if markings are located on the bearing surface, they shall be depressed.

Product Applications

ASTM A563 Gr DH heavy hex nuts are carbon and alloy steel nuts for general structural and mechanical uses on bolts, studs, and other externally threaded parts. They are widely used in oil and gas, agriculture, architectural, and heavy equipment.

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