Home > Products > Industrial Supplies > Machine Hardware > Nuts & Bolts

Basic Info

Model NO.: ASTMA563
Type: Heavy Hex Structural Nuts
Head Style: Hexagonal
Material: Carbon Steel
Standard: ASTM
Export Markets: USA, Canada, Brazil, U.K., France, Germany, Spain, Italy, Switzerland, Dubai
, Singapore, Malaysia, Japan, Korea.etc.




Additional Info

Trademark: M
Packing: 25kgs+36ctns

Origin: Ningbo, China




Product Description

1) Grade: ASTMA563 Gr. C
2) Size: 1/4"-4"
3) Material: Carbon steel, alloy steel ,stainless steel
4) Surfaces: Black, zinc plated, zinc (Yellow) plated, H.D.G. etc.
5) Packaging: 25kgs per box, 36 boxes per pallet

1. Scope

1. This specification covers chemical and mechanical requirements for eight grades of carbon and alloy steel nuts for general structural and mechanical uses on bolts, studs, and other externally threaded parts.

2. Materials and Manufacture

2.1 Steel for nuts shall be made by the open-hearth, basic-oxygen, or electric-furnace process except that steel for Grades O, A, and B nuts may be made by the acid-bessemer process.

2.2 Nuts may be made cold or hot by forming, pressing, or punching or may be machined from bar stock

2.3 Grades DH 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°F.

2.4 Grades C and D nuts made of steel having carbon content not exceeding 0.20%, phosphorus not exceeding 0.04%, and sulfur not exceeding 0.05% by heat analysis may be heat treated by quenching in a liquid medium from a temperature above the transformation temperature and need not be tempered.

2.5 Grades C, and D nuts made of any steel permitted for these grades may 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°F.

2.6 Zinc Coatings, Hot-Dip and Mechanically Deposited:

2.6.1 When zinc-coated fasteners are required, the purchaser shall specify the zinc coating process, for example, hot-dip, mechanically deposited, or no preference.

2.6.2 Hot-dip zinc-coated nuts shall be tapped after zinc coating.

2.6.3 Mechanically deposited zinc-coated nuts for assembly with mechanically deposited zinc-coated bolts shall be tapped oversize prior to zinc coating and need not be retapped afterwards.

2.7Lubricant:

2.7.1 Hot-dip and mechanically deposited zinc-coated Grade DH nuts shall be provided with an additional lubricant which shall be clean and dry to the touch.