® Mill - Thread Inserts Product Identification Mill-Thread Inserts Ordering Codes 30 E 12 UN MT7 Thread Thread Carbide Pitch Profile Grade ISO MT7 UN WHIT 12 NPT 1421 NPTF 30 BSPT 40 E = External NPS I = Internal NPSF - = Ext. + Int. PG UNJ ACME AM. BUTT NPSM API RD Insert Size = A 12 14 21 30 40 H 6.3 7.5 12 16 20 T 2.9 3.1 4.7 5.5 6.3 B01-2