Four Flute Type C Countersinks, Fuller Type C, Fuller countersink
W.L. Fuller W.L. Fuller
  • Four Flute Type C Countersinks, Fuller Type C, Fuller countersink

Four Flute Type C Countersinks

Fuller Type C Four Flute Countersinks are used to countersink and counter bore for the heads of screws in woods, plastics, and non-ferrous metals. Manufactured of case-hardened carbide steel for long wear, the 82 degree angle is designed to accommodate flat or oval head screws. Drills Bits and Stop Collars are sold separately.

Fuller's Type C Countersinks are heat treated for long tool life. The countersink is held in place with two hex-socket screws and is easily adjustable up and down the drill. As a result, only one countersink and length of drill is required for one screw size. (Drills are not included unless specified.)

You can also use a Type C countersink with a stop collar to drill, countersink, and counterbore in one step.

 
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Tech Spec Product Info User Generated Content
Recommended Drill Bit sizes  Countersink Diameter  Taper Point Drill  Taper Point Drill  Straight Drill  Straight Drill 
Screw Size  Cut Size  Hardwood  Softwood  Hardwood  Softwood  Bung Dia. 
1/4  3/32  5/64  1/16  1/16  1/4 
1/4  7/64  3/32  5/64  1/16  1/4 
1/4  7/64  3/32  5/64  1/16  1/4 
5/16  1/8  7/64  3/32  5/64  5/16 
5/16  9/64  1/8  7/64  3/32  5/16 
3/8  5/32  9/64  7/64  3/32  5/16 
3/8  11/64  5/32  1/8  7/64  3/8 
3/8  3/16  11/64  9/64  1/8  3/8 
10  7/16  13/64  3/16  9/64  1/8  7/16 
12  1/2  7/32  13/64  5/32  9/64  1/2 
14  1/2  1/4  15/64  11/64  5/32  1/2 
16  5/8  9/32  17/64  3/16  11/64  5/8 
18  5/8  5/16  19/64  7/32  13/64  5/8 
20  3/4  21/64  5/16  15/64  7/32  3/4 
24  7/8  3/8  3/8  17/64  1/4  7/8 
BRAND: W.L. Fuller
Type: Countersink
4 5

REVIEW SNAPSHOT®

by PowerReviews
W.L. FullerFour Flute Type C Countersinks
 
4.0

(based on 5 reviews)

Ratings Distribution

  • 5 Stars

     

    (3)

  • 4 Stars

     

    (1)

  • 3 Stars

     

    (0)

  • 2 Stars

     

    (0)

  • 1 Stars

     

    (1)

80%

of respondents would recommend this to a friend.

Pros

    Cons

      Best Uses

          • Reviewer Profile:
          • Avid do-it-yourselfer (3)

        Reviewed by 5 customers

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        Displaying reviews 1-5

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        5.0

        Work great

        By tuxamation

        from San Diego, CA

        About Me Avid Do-It-Yourselfer

        Verified Reviewer

        Pros

        • Easy To Store

        Cons

          Best Uses

            Comments about W.L. Fuller Four Flute Type C Countersinks:

            If you own the counter sink and the matching plug cutter, you can always find scraps from the same wood to use for the plug cutting. That assures the plugs match very well. Much better than buying a bag of plugs (of the same wood type, but often very different in the way they take the finish) The set screws can have a hard time griping the smooth shaft of the drill bit, but if you're able to get the set screws at the top of the drill bit flutes they will grip like crazy.

             
            4.0

            Worked great

            By wb9tpg

            from Versailles, KY

            About Me Avid Do-It-Yourselfer

            Pros

            • Strong

            Cons

            • Cleanout

            Best Uses

            • In The Workshop

            Comments about W.L. Fuller Four Flute Type C Countersinks:

            I owned some cheap countersinks that I attempted to use for the #8 1-1/4" screws on the gunwales of the canoe I'm building and broke the bit on the first test hole. I ordered the Fuller C8 countersink and extra bits (just in case) to replace it. It worked great and I drilled the 60+ holes without breaking any bits at all. My only complaint is that it did not clean out the debris very well and I had to stop 3 times on every hole to clean out the bit (drilling ash).

             
            5.0

            Awesome countersink

            By REM

            from Upstate Ny

            About Me Professional

            Pros

            • Easy To Use
            • Powerful

            Cons

              Best Uses

                Comments about W.L. Fuller Four Flute Type C Countersinks:

                Best countersink I've seen. Having 4 flutes gives it super smooth cuts that are fast to do. Also, having 4 flutes they last forever. Do yourself a favor and dont cheap out on countersinks. Another plus is that Fuller is a U.S. based family owned company and they have great customer service and are very helpful and pleasant to deal with. If you cant find something, call them and they will help you. I did, otherwise I would have never found these #2 and #3 countersinks.

                (1 of 2 customers found this review helpful)

                 
                1.0

                Countersink comes loose

                By Dave

                from Westerly, R.I.

                About Me Professional

                Verified Reviewer

                Pros

                  Cons

                  • Hard To Use

                  Best Uses

                    Comments about W.L. Fuller Four Flute Type C Countersinks:

                    I bought the Type C countersink along with a tapered drill and stop collar to mount PVC toerail on my boat. The counterbore will not stay locked onto the drill bit no matter how tight I make the set screws. This thing is barely useable.

                     
                    5.0

                    Nice way to center the countersink

                    By Allen

                    from Palo Alto, CA

                    About Me Avid Do-It-Yourselfer

                    Pros

                    • Easy To Use

                    Cons

                      Best Uses

                      • In The Yard

                      Comments about W.L. Fuller Four Flute Type C Countersinks:

                      I drilled the pilot hole then put this countersink on some round stock the same diameter as the pilot hole. This allowed me to center the pilot hole before I drilled the relief hold for the shank. I used a drill guide for the pilot hole so could not put this on the drill, although I guess that is what they had in mind when they made them.

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