... 22ER 11IR/16IR/22IR etc.. Items are ISO,A,AG,G,W,UN,NPT,ACME,API carbide internal & external threading ... 16ER/22ER11IR/16IR/22IR etc..Items are ISO,A,AG,G,W,UN,NPT,ACME,API et1.tolerance below +0. ... M LF901116 ER 12 UN LDC16 IR 11 BSPT LDAMGMN200-G LDA16 ER 12 W LDC16 IR 11 BSPT LDCMGMN300- ... threading insert). LDC shows yellow coating,suitable for processing steel.16 ER 19 W LDA16 IR 18 NPT LDC16 ER 19 ...