CE V S PHG 250 0910 Cop yright 2010 b y Wur th 12 0006 Identi cation Grade Mark Speci cation Mat erial Proof Load psi Y eild S t rengt h Min psi T ensile S t rengt h psi Metric Eq uiv alent S AE J429 Gr ade 2 ASTM 8307 Lo w or Median Steel 33000 36000 60000 Class 46 S AE J429 Gr ade 5 ASTM A449 Medium Carbon Steel 85000 74000 92000 thr ough 81000 120000 thr ough 105000 Class 88 S AE J429 Gr ade 8 ASTM A354 Medium Allo y Steel 120000 130000 150000 Class 109 F593C 304307 188 ASTM 193 Chr omium Nick el Allo y 64800 76900 72000 85500 80000 thr ough 95000 A2 F593 C316 316 1610 ASTM 193 Chr omium Nick el Allo y 64800 76900 72000 85500 80000 thr ough 95000 A4 Diameter inches No of thr eads per inch Length inches Size Ex am ple 58 11 x 5 Dia TPI Lengt h ST AND AR D B O L T IDE NTIFICA TION