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3/8-16 Tap, Spiral Point Plug, UNC STI thread, H5/H6, 3 flutes, HSS-E, TiN Coated

  • Item Code: 3990-9.525
  • 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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Overall Length (mm) 85.6996
Coating TiN
Diameter 3/8-16
Number of flutes 3
Brand Guhring
chamfer (decimal) Spiral Point Plug
H Limit H5/H6
Shank Diameter (mm) 9.3218
Square Size (decimal) 0.286
Overall Length (decimal) 3.3740
Material HSS-E
threadtype UNC STI
Diameter (mm) 9.52
Series 3990