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6-32 Tap, Spiral Point Plug, UNC STI thread, H3/H4, 3 flutes, HSS-E, TiN Coated

  • Item Code: 3990-3.505
  • Brand: Guhring
  • Unit Size: 1

Description

An STI tap thread tap is designed to create an oversized thread to accommodate the required Heli-Coil insert. Screw Thread Inserts (STI) are helically formed diamond shaped stainless steel or phosphorous bronze wire that screw into a threaded hole to form a mating internal thread. Screw thread inserts are a convenient way of repairing stripped out threads and are also used to provide stronger threads in softer materials than can be obtained by directly tapping the base metal.

Tech Specs

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Series 3990
Square Size (decimal) 0.11
Overall Length (mm) 60.2996
Coating TiN
Material HSS-E
chamfer (decimal) Spiral Point Plug
Brand Guhring
Diameter (mm) 3.503
Reach (decimal) 0.9450
threadtype UNC STI
H Limit H3/H4
Overall Length (decimal) 2.3740
Diameter 6-32
Number of flutes 3
Shank Diameter (mm) 4.9276