Standard_Parts_Catalogue

| Extract from DIN / ISO Standard Page 2147 DIN 228 Pipe Threads Extract Nominal thread size Gradient P Bolt thread Nut thread Number of gears of 25,4 mm equal to mm Major-Ø d Pitch-Ø d 2 Minor-Ø d 1 Major-Ø D Pitch-Ø D 2 Minor-Ø D 1 Max. Min. Max. Min. A Min. B Max. Min. Max. Min. Min. Max. Min. Max. G ⅛ 28 0,907 9,728 9,514 9,174 9,040 8,933 8,566 not specified not specified  9,728 9,254 9,147 8,848 8,566 G ¼ 19 1,337 13,157 12,907 12,301 12,176 12,051 11,445 13,157 12,426 12,301 11,890 11,445 G ⅜ 19 1,337 16,662 16,412 15,806 15,681 15,556 14,950 16,662 15,931 15,806 15,395 14,950 G ½ 14 1,814 20,955 20,671 19,793 19,651 19,509 18,631 20,955 19,935 19,793 19,172 18,631 G ⅝ 14 1,814 22,911 22,627 21,749 21,607 21,465 20,587 22,911 21,891 21,749 21,128 20,587 G ¾ 14 1,814 26,441 26,157 25,279 25,137 24,995 24,117 26,441 25,421 25,279 24,658 24,117 G ⅞ 14 1,814 30,201 29,917 29,039 28,897 28,755 27,877 30,201 29,181 29,039 28,418 27,877 G 1 11 2,309 33,249 32,889 31,770 31,590 31,410 30,291 33,249 31,950 31,770 30,931 30,291 G 1⅛ 11 2,309 37,897 37,537 36,418 36,238 36,058 34,939 37,897 36,598 36,418 35,579 34,939 G 1¼ 11 2,309 41,910 41,550 40,431 40,251 40,071 38,952 41,910 40,611 40,431 39,592 38,952 G 1½ 11 2,309 47,803 47,443 46,324 46,144 45,964 44,845 47,803 46,504 46,324 45,485 44,845 G 1¾ 11 2,309 53,746 53,386 52,267 52,087 51,907 50,788 53,746 52,447 52,267 51,428 50,788 G 2 11 2,309 59,614 59,254 58,135 57,955 57,775 56,656 59,614 58,315 58,135 57,296 56,656 The pitch diameter d 2 of the bolt thread has two tolerance classes: A and B. The nut thread has only one tolerance class. The metal pipe threads listed in this catalog are made according to the „more accurate“ tolerance class A. For threads in plastic standard parts, this tolerance class can usually not be maintained for manufacturing reasons. Description