BIG BOLT NUT is a largest manufacturer & exporter of Astm A563 Bigger Diameter Bolt and nuts. the ASTM A563 specification covers the chemical and mechanical requirements for carbon and alloy steel nuts used on bolts, studs, and externally threaded fasteners.

This is important because some nut grades are not readily available in certain sizes and finishes. Additionally, the specification allows for the substitution of ASTM A563 grade 2H nuts in lieu of A563 grade DH nuts due to the lack of availability of grade DH nuts in nominal sizes 3/4″ and larger.

BigBoltNut is committed to providing our clients with the best-in-class products and services. With our planned expansion and continuous focus on quality, we are well-positioned to fulfil the worldwide market's expanding expectations. Contact BigBoltNut today for more information on our goods and services, or to make an order, and find out why we are a preferred fasteners manufacturer in India.