Home / Drilling & Tapping / Tapping / Tap, Pipe, 1-1/2″ x 11-1/2 NPTF 7 Flute, 4-1/4″ OAL, USA Tap, Pipe, 1-1/2″ x 11-1/2 NPTF 7 Flute, 4-1/4″ OAL, USA$30.00 Category: Tapping Related products Tap, Acme Tandem , 1″ – 5 TPI Right Hand $95.00 Read more Die Head, Threading Threads, National Acme DS 1-5/8 $149.00 Read more Tapping Head, Procunier #3 MT #2 Shank $199.00 Read more Tapping Head, Ettco 1-B , JT 6 Shank $49.00 Read more