High Speed Steel - Chatterless Countersink - 3 Flute - 60 Deg - 5/16 X 1/4 X 2-1/2 — HTC Mfg.
HTC Mfg. HSS Countersink generic category product image
High Speed Steel - Chatterless Countersink - 3 Flute - 60 Deg - 5/16 X 1/4 X 2-1/2 — HTC Mfg.
HTC Mfg. HSS Countersink generic category product image

High Speed Steel - Chatterless Countersink - 3 Flute - 60 Deg - 5/16 X 1/4 X 2-1/2

Countersink
$6.59 each
Item
Quantity
- +

5/16" body 60° countersink, 3 flutes.

A countersink cuts the tapered seat that lets a flat-head screw finish flush with the surface. This one has a 5/16" cutting body on a 1/4" shank, 2-1/2" overall, ground to a 60° included angle.

The "chatterless" grind stays in contact with the work rather than skipping across it, which is what stops the tool from cutting a lobed, faceted hole.

A 60° included angle is the usual choice for deburring and for centring work.

Specifications

  • Body size (cutting diameter): 5/16"
  • Shank diameter: 1/4"
  • Overall length (OAL): 2-1/2"
  • Included angle: 60°
  • Flutes: 3
  • Style: Chatterless
  • Tool material: High-Speed Steel (HSS)
  • Item number: 33003

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