Overall lengthThread length Thread+Neck lengthShank lengthShank dia.Size of squareLength of square
T SimpleThread Inspection ToolsLℓnℓsDsKℓk
SizeClassCodeL (mm)ℓ (mm)ℓn (mm)ℓs (mm)Ds (mm)K (mm)ℓk (mm)TypeStock
9/16-12UNCFor Go For Not-go2BITM2U09SG ITM2U09SN9526 17474812.510133 4
9/16-18UNFFor Go2BITM2U09OG9520474812510133
For Not-goITM2U09ON13.4
5/8-11UNCFor Go2BITM2U10UG9526474812510133
For Not-goITM2U10UN17.4
5/818UNFFor Go2BITM2U10OG9520474812510133
-For Not-goITM2U10ON13.4