Designation:A563-15 INTERNATIONAL Standard Specification for Carbon and Alloy Steel Nuts1 This standard is issued under the fixed designation A563;the number immediately following the designation indicates the year of original adoption or in the case of revision the year of last revision.A number in parentheses indicates the year of last reapproval.A superscript epsilon (e)indicates an editorial change since the last revision or reapproval. This standand has been approved for use by agencies of the U.S.Department of Defense. 1.Scope* High Temperature Service or Both 1.1 This specification2 covers chemical and mechanical A242/A242M Specification for High-Strength Low-Alloy requirements for eight grades of carbon and alloy steel nuts for Structural Steel general structural and mechanical uses on bolts studs.and A307 Specification for Carbon Steel Bolts Studs and other externally threaded parts. Threaded Rod 60 000 PSI Tensile Strength A325 Specification for Structural Bolts Steel Heat Treated NoTE I-See Appendix XI for guidance on suitable application of nut 120/105 ksi Minimum Tensile Strength grades. A354 Specification for Quenched and Tempered Alloy Steel 1.2 The requirements for any grade of nut may at the Bolts Studs and Other Externally Threaded Fasteners supplier's option and with notice to the purchaser be fulfilled A394 Specification for Steel Transmission Tower Bolts by furnishing nuts of one of the stronger grades specified Zinc-Coated and Bare herein unless such substitution is barred in the inquiry and A449 Specification for Hex Cap Screws Bolts and Studs purchase order. Steel Heat Treated 120/105/90 ksi Minimum Tensile 1.3 Grades C3 and DH3 nuts have atmospheric corrosion Strength General Use resistance and weathering characteristics parable to that of A490 Specification for Structural Bolts Alloy Steel Heat the steels covered in Specifications A242/A242M A588/ Treated 150 ksi Minimum Tensile Strength A588M and A709/A709M.The atmospheric corrosion ...