Case IH OPTUM 270 CVT - Page 22

INTRODUCTION
Gradesofinchprevailingtorquelocknuts,allmetal(threecommonmarkingmethods)
Onprevailingtorquelocknuts,thegradeofnutisidentiedbyoneofthreedifferentsetsofmarkingsthatdenotethe
strengthlevelandmanufacturer.
Commonprevailingtorquelocknutgradeidenticationmarkings
Gradeidenticationmarking
Grade
Markingdescription
GradeA
Nomarks
GradeB(hexnut)andGradeF(angenut)
Threeraisedorindenteddotmarks
(Marksdonothavetobeincorners.)
GradeC(hexnut)andGradeF(angenut)
Sixraisedorindenteddotmarks
(Marksdonothavetobeincorners.)
GradeA
Nolettermarkonsideat
GradeB
LetterBonsideat
GradeC
LetterConsideat
GradeA
Nonotches
GradeB
Onecircumferentialnotchonallsixcorners
GradeC
Twocircumferentialnotchesonallsixcorners
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