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The 1/4 inch UNC hand tap has a nominal diameter of 0.25 inches and a thread pitch of 20 threads per inch TPI, conforming to the Unified National Coarse standard. Its thread angle of 60 degrees enhances mechanical strength and improves joint quality. This tap is made from high-speed steel HSS with a hardness of 60-65 HRC, providing optimal resistance to wear and heat. The overall length typically ranges between 50 to 70 millimeters, and its square shank allows easy installation in a tap wrench. Precise flutes ensure uniform chip removal and extend tool life.
This tool is highly suitable for cutting internal threads in medium to hard metal parts. The recommended pilot drill size for this tap is 5.3 millimeters, ensuring optimal thread engagement. The suggested manual operating speed ranges from 12 to 18 revolutions per minute. The 1/4 UNC tap is widely used in machining, repair, and industrial equipment manufacturing, delivering precise and standard thread quality.
WEBSITE: HAND TAPS 1/4 UNC Iran
