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10-32 Tap, UNC STI thread, H3/H4, 3 flutes, HSS-E, TiN Coated

  • Item Code: 3991-4.826
  • 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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Coating TiN
Coolant without
Material HSS-E
Square Size (decimal) 0.152
Diameter (mm) 4.826
Number of flutes 3
Series 3991
Shank Diameter (mm) 6.477
H Limit H3/H4
Overall Length (mm) 63.5
Overall Length (decimal) 2.5000
Brand Guhring
Diameter 10-32
threadtype UNC STI
Reach (decimal) 1.1810