Threading Inserts ACME EXTERNAL ANSI/ASME 1.5-1988 A B ACME NUT 29° I.C. L ACME SCREW PITCH CATALOG NUMBER DIMENSIONS TPI RIGHT HAND LEFT HAND L mm I.C. A B 16 ACME 16 ER11 ACME 16 EL11 11 6.35 1.0 1.1 16 ACME 16 ER16 ACME 16 EL16 1.0 1.1 14 ACME 14 ER16 ACME 14 EL16 1.0 1.2 12 ACME 12 ER16 ACME 12 EL16 16 9.525 1.1 1.2 10 ACME 10 ER16 ACME 10 EL16 1.3 1.4 8 ACME 8 ER16 ACME 8 EL16 1.4 1.5 6 ACME 6 ER22 ACME 6 EL22 1.8 2.1 22 12.70 5 ACME 5 ER22 ACME 5 EL22 2.0 2.3 4 ACME 4 ER27 ACME 4 EL27 27 15.875 2.4 2.6 34