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Alvord Polk 500 High-Speed Steel Counterbore, Built-In Pilot, Uncoated (Bright) Finish, 7/16" (On Size) Size

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Product Specifications
Body Outside Diameter
0.663  inches
Compatible Fastener Description
7/16 inches (On Size)
Flute Length
1.6875  inches
Flute Type
right hand spiral
Narrow End Diameter
0.4375  inches
Number of Items
Outside Diameter
0.663  inches
Overall Length
7  inches
Shank Diameter
0.5  inches
Shank Width
0.437  inches
Size Name
7/16 inches (On Size)
Special Features
Right Hand Spiral Flute
System of Measurement
Specification for this product family (See all  products)
Manufacturer Series Number
Finish Types
Uncoated (Bright)
Shank Type
Material Type
High-Speed Steel
Part Number
Style Name
Built-In Pilot
Brand Name
Alvord Polk

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Key Features

  • Used to enlarge existing holes
  • One piece construction including the pilot
  • Round shank tools are cylindrical and should be held in a good quality tool holder in order to prevent the counterbore from slipping in high torque applications
  • High-speed steel is a common general purpose steel for cutting tools, is compatible with a variety of materials, and tends to be lower in price
  • Uncoated (bright) tools have no finish or coating. They are a good choice for general purpose applications.

Package Details

Shipping Weight: 0.4 pounds
Package Size: 7 x 1.1 x 0.9 inches

Product Description

Counterbores are cutting tools that have a pilot to guide them into a previously drilled hole. They are used to form a recess or pocket for a socket head capscrew. These tools are of a solid high speed steel construction. High speed steel is a common general purpose material for cutting tools and is used to cut a variety of different materials.

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