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Single Flute Countersink (Sizes)
Single Flute Countersink (Sizes)
Please Note: We try very hard to present accurate product images, but product changes occur constantly. All images should be considered approximations. If a particular product feature, color or characteristic is especially important, please call us to verify that information before placing your order. Thank you.
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Single Flute Countersink (Sizes)


  • 82 degree pitch
  • 1/4 In shank
  • For machine countersinking holes of small diameter.
  • Hooked rake angle gives a smooth surface finish in almost all materials.
  • It is suggested that the diameter of the tool chosen be at least 50% larger than the finished diameter required.
  • Not to be used in portable applications.

Stocking Data is current as of 3/24/2026 5:45:02 PM CT

Product SKU Mfr Part # Selling Unit Qty Avail/Qty On-order Price Order
Single Flute Countersink 1/4 In 27818 XL801-1/4X82 EA 2/0In Stock
1- 4
$14.790
5-24
$13.311
25+
$12.572
Single Flute Countersink 3/8 In 27820 XL801-3/8X82 EA 2/0In Stock
1- 4
$16.790
5-24
$15.111
25+
$14.272
Single Flute Countersink 1/2 In 27817 XL801-1/2X82 EA 6/0In Stock
1- 4
$20.990
5-24
$18.891
25+
$17.842
Single Flute Countersink 5/8 In 27821 XL801-5/8X82 EA 2/0In Stock
1- 4
$29.290
5-24
$26.361
25+
$24.897
Single Flute Countersink 3/4 In 27819 XL801-3/4X82 EA 1/0In Stock
1- 4
$38.990
5-24
$35.091
25+
$33.142