9/32-24 UN HSS Left Hand Thread Plug Tap, Stanley Plane Restoration Tools

9/32-24 UN HSS Left Hand Thread Plug Tap, Stanley Plane Restoration Tools, see #8 & 8A on the attached Stanley parts diagramStanley changed from right hand to left hand thread on the Plane Iron Depth Position Stud starting with Type 7 Unified aka UN is a 60 degree thread pitch used by Stanley on this size thread. High Speed Steel (HSS) will stay sharp longer than High Carbon Steel (HCS). Wholesale cost of HSS is 12 times that of HCS. Cutting fluid reduces friction and helps produce smoother threads. *** Please wear your safety glasses *** We will combine shipping on multiple items and refund the savings. Receive a $3.00 refund on this item when you order more than one item for shipping at the same time. MWTCA organization members will receive a 10% discount rebate. Send us a message and let us know you are a member. We will send your rebate promptly through eBay. Thank you for supporting Mid West Tool Collectors Association.