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20C981 Counterbores with Built-In Pilots

$20.36

Bulk orders will be discounted, please contact us.

High-speed steel counterbores are the most common choice for creating a flat-bottomed cavity at the top of the hole so that a bolt, nut, or other part is hidden beneath or sits flush with the top of the hole when installed into it. High-speed steel is less brittle than cobalt and can better withstand vibration and chattering. Sometimes known as solid pilot counterbores, these counterbores have a built-in pilot that cannot be removed and which keeps the counterbore centered in the hole to ensure a level seat.

Product Number: 20C981

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  • Description
Mfr Model 303-0.54
Measurement System Wire
Pilot Dia 9/64 in
Overall Length 4-1/8 in
Shank Dia 3/16 in
Material Machining High Speed Steel
UNSPSC 23171610
Country of Origin USA (subject to change)
Counterbore Type Oversized
For Screw Size #5
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