ASTM A563-00 - 10.1.2000
 
1. Scope

1.1 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.

Note 1-See Appendix X1 for guidance on suitable application of nut grades.

1.2 The requirements for any grade of nut may, at the supplier's option, and with notice to the purchaser, be fulfilled by furnishing nuts of one of the stronger grades specified herein unless such substitution is barred in the inquiry and purchase order.

1.3 Grades C3 and DH3 nuts have atmospheric corrosion resistance and weathering characteristics comparable to that of the steels covered in Specifications A 242/A 242M, A 588/A 588M, and A 709/A 709M. The atmospheric corrosion resistance of these steels is substantially better than that of carbon steel with or without copper addition (see 5.2). When properly exposed to the atmosphere, these steels can be used bare (uncoated) for many applications.

Note 2-A complete metric companion to Specification A 563 has been developed-A 563M; therefore, no metric equivalents are presented in this specification.

 
2. Referenced Documents

A242/A242M-24

Standard Specification for High-Strength Low-Alloy Structural Steel

A307-21

Standard Specification for Carbon Steel Bolts, Studs, and Threaded Rod 60 000 PSI Tensile Strength

A325-14

Standard Specification for Structural Bolts, Steel, Heat Treated, 120/105 ksi Minimum Tensile Strength (Withdrawn 2016)

A354-26

Standard Specification for Quenched and Tempered Alloy Steel Bolts, Studs, and Other Externally Threaded Fasteners

A394-08(2024)

Standard Specification for Steel Transmission Tower Bolts, Zinc-Coated and Bare

A449-14(2020)

Standard Specification for Hex Cap Screws, Bolts and Studs, Steel, Heat Treated, 120/105/90 ksi Minimum Tensile Strength, General Use

A490-14

Standard Specification for Structural Bolts, Alloy Steel, Heat Treated, 150 ksi Minimum Tensile Strength

A563M-07

Standard Specification for Carbon and Alloy Steel Nuts [Metric]

A588/A588M-24

Standard Specification for High-Strength Low-Alloy Structural Steel, up to 50 ksi [345 MPa] Minimum Yield Point, with Atmospheric Corrosion Resistance

A687-93

Standard Specification for High-Strength Nonheaded Steel Bolts and Studs (Withdrawn 1999)

A709/A709M-26

Standard Specification for Structural Steel for Bridges

A751-25

Standard Test Methods and Practices for Chemical Analysis of Steel Products

B695-21

Standard Specification for Coatings of Zinc Mechanically Deposited on Iron and Steel

D3951-18(2023)

Standard Practice for Commercial Packaging

F606-14

Standard Test Methods for Determining the Mechanical Properties of Externally and Internally Threaded Fasteners, Washers, Direct Tension Indicators, and Rivets

F812/F812M-12(2022)e1

Standard Specification for Surface Discontinuities of Nuts, Inch and Metric Series (Includes all amendments and changes 9/12/2023).

F1789-26

Standard Terminology for F16 Mechanical Fasteners

F2329-13

Standard Specification for Zinc Coating, Hot-Dip, Requirements for Application to Carbon and Alloy Steel Bolts, Screws, Washers, Nuts, and Special Threaded Fasteners

G101-04(2025)

Standard Guide for Estimating the Atmospheric Corrosion Resistance of Low-Alloy Steels

A194/A194M-26

Standard Specification for Carbon Steel, Alloy Steel, and Stainless Steel Nuts for Bolts for High Pressure or High Temperature Service, or Both