国我人隆 Metric Classes2 .Metric tolerances are given in grades of 3 through 9 .Allowance is given in terms of 5 positions: >two,G and H,for internal threads >three,e,g,and h for extemal threads >Other allowances es,esg and Ele for the M profile are defined in terms of pitch as shown in table 43 国活我大燮 Metric Classes2 Extemal Thread 8÷088R a015+001p Tolerenee Grade ea 43 988 TD -04830-019 TD .02g 字： B I 含： 4443 Metric Classes2 •Metric tolerances are given in grades of 3 through 9 •Allowance is given in terms of 5 positions: two, G and H, for internal threads three, e, g, and h for external threads Other allowances ese, esg and EIG for the M profile are defined in terms of pitch as shown in table 44 Metric Classes2