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5/16-18 Tap And Die Set, UNC Machine Thread Tap And UNC Round Thread Die Right Hand HSS Taper - Amazon.com
Tap Die Set Unc Unf | Thread Die 7 16 Unf | 3 8 16 Unc Thread | 3 4 16 Unf Thread - Right - Aliexpress
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Amazon.com: 5/16-24, 5/16-32, 5/16-36, 5/16-40 HSS Tap And Die Set, UNEF Machine Thread Tap And UNEF Round Thread Die Right Hand (5/16-24 UNF) : Industrial & Scientific
Osg Die Item, 5/16"-18 Die Thread, 2" W 2710400 | Zoro
5/16"-18 UNC Tap and Die Set HSS Thread Tap with Round Threading Die Right Hand | eBay