WIDIA GTD, 3/8"-24 Thread Size, 1 1/4 in Thread Lg, Straight Flute Tap - 3FML6|14194 - Grainger
Surge Stopper BL15-24-8-6s Relocatable Power Tap 8-Outlets 15A 125V 60 Hz | eBay
2pcs Hand Tap Round Die Set Unc 5/8 Unified Thread Dies Taps Unf 5/8-12 5/8-14 5/8-16 5/8-18 5/8-20 5/8-24 5/8-28 5/8-32 5/8-40 - Tap & Die - AliExpress
Micro Matic 1735-S 24 Inch Kool-Rite Glycol Cooled Center Outlet 8 Tap Insert Module With 3 Inch Centers And 1 5-8 Inch Shanks