® Mill - Thread Inserts UNJ 5/16 P Pitch Insert Size = A TPI 14 21 24 Ext. 14 E 24 UNJ 21 E 24 UNJ 24 Int. 14 I 24 UNJ 21 I 24 UNJ 20 Ext. 14 E 20 UNJ 21 E 20 UNJ 20 Int. 14 I 20 UNJ 21 I 20 UNJ 18 Ext. 14 E 18 UNJ 21 E 18 UNJ 18 Int. 14 I 18 UNJ 21 I 18 UNJ 16 Ext. 14 E 16 UNJ 21 E 16 UNJ 16 Int. 14 I 16 UNJ 21 I 16 UNJ 14 Ext. 14 E 14 UNJ 21 E 14 UNJ 14 Int. 14 I 14 UNJ 21 I 14 UNJ 12 Ext. 14 E 12 UNJ 21 E 12 UNJ 12 Int. 14 I 12 UNJ 21 I 12 UNJ Order example: 21E 16 UNJ MT7 American Buttress ABUT thread inserts are one-sided and may be used for both External and Internal threading Pitch Insert Size = A TPI 21 30 40 16 21 - 16 ABUT 30 - 16 ABUT 12 21 - 12 ABUT 30 - 12 ABUT 10 21 - 10 ABUT 30 - 10 ABUT 8 21 - 8 ABUT 30 - 8 ABUT 6 30 - 6 ABUT 4 * 30 - 4 ABUT 40 - 4 ABUT Order example: 30 - 6 ABUT MT7 * Inserts to be used only on Multi-Insert toolholders see page B02-5 B01-9