Century Drill & Tool fractional hexagon die for hand-cutting 3/8"-16 NC threads. High carbon steel, heat treated and tempered for file-hard threads and long service life. The 1" hex shape fits standard hex die stocks and can also be turned with a 1" wrench or socket in tight spots.

• Thread: 3/8"-16 NC National Coarse (UNC)
• 1" across flats hexagon shape
• Material: high carbon steel, heat treated
• Right-hand thread, precision cut
• Fits Century 98504 and 98511 die stocks (1" hex)
• For hand threading in steel, brass, aluminum, and other machinable metals

Tip: Use cutting oil and back the die off a half turn every full turn to break the chip and prevent binding.