Century Drill & Tool fractional hexagon die for hand-cutting 3/8"-16 National Coarse (UNC) threads. Made from high carbon steel, heat treated and tempered for file-hard threads and long service life. The 1-inch hex shape fits standard hex die stocks, and can also be turned with a 1-inch wrench or socket for confined-space work.

• 3/8"-16 National Coarse (UNC) thread
• 1" across flats hexagon shape
• High carbon steel, heat treated
• Right-hand thread, precision cut
• Fits Century 98504 and 98511 die stocks
• For hand threading in steel, brass, and aluminum