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USA inventory with fast free shipping from Florida! 9/32-24 UN M2 HSS Left Hand Thread Bottom Tap, Stanley Plane Restoration Tools, see #8 & 8A in blue on the attached Stanley Parts Diagram This tap will let you thread and chase the plane iron depth position brass nut and the plane iron depth position stud hole in the back of the frog A taper tap is best for starting and threading a new hole due to the extended chamfer. If your budget allows for only one tap, I recommend a plug tap. A plug tap will let you start and thread a new hole and also allow threading a blind hole to within ~1/8″ of the bottom. A bottom tap allows chasing and tapping threads very close to the bottom of blind holes. This bottom tap will allow threading a blind hole to within ~1/16” of the bottom. All taps and dies can be used for chasing. Chasing is the process of rethreading damaged, rusty or paint filled threads. Unified or Unified National aka UN is a 60 degree thread angle used by Stanley on this size thread. High Speed Steel (HSS) is a broad description of steel grade. A chair made of wood is also a broad description. Is the chair made of soft wood like pine or something hard like hickory? Our HSS taps and dies are made from M2 HSS, a premium grade tool steel utilizing 0.85% carbon (C) 4.15% chromium (Cr) 6.15% tungsten (W) 5.0% molybdenum (Mo) and 1.85% vanadium (V). These added elements provide a high level of hardness and increased resistance to wear. 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.