W.L. Fuller
Four Flute Type C Countersinks
Four Flute Type C Countersinks
$13.05Limited StockSee Product Details
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FUL-C3 -- 1/4 in Cut 3/32 in Drill Bit #3FUL-C65 -- 5/16 in Cut 9/64 in Drill Bit #6FUL-C411 -- 5/16 in Cut 11/64 in Drill BitFUL-C5 -- 3/8 in Cut 1/8 in Drill BitFUL-C6 -- 3/8 in Cut 9/64 in Drill Bit #6FUL-C7 -- 3/8 in Cut 5/32 in Drill Bit #7FUL-C8 -- 3/8 in Cut 11/64 in Drill Bit #8FUL-C9 -- 3/8 in Cut 3/16 in Drill Bit #9FUL-C913 -- 3/8 in Cut 13/64 in Drill Bit #10FUL-C10 -- 7/16 in Cut 13/64 in Drill Bit #10FUL-C92 -- 1/2 in Cut 3/16 in Drill Bit #9FUL-C12 -- 1/2 in Cut 7/32 in Drill Bit #12FUL-C14 -- 1/2 in Cut 1/4 in Drill Bit #14
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Product Details
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.
Tech Specs
| 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. |
| 2 | 1/4 | 3/32 | 5/64 | 1/16 | 1/16 | 1/4 |
| 3 | 1/4 | 7/64 | 3/32 | 5/64 | 1/16 | 1/4 |
| 4 | 1/4 | 7/64 | 3/32 | 5/64 | 1/16 | 1/4 |
| 5 | 5/16 | 1/8 | 7/64 | 3/32 | 5/64 | 5/16 |
| 6 | 5/16 | 9/64 | 1/8 | 7/64 | 3/32 | 5/16 |
| 7 | 3/8 | 5/32 | 9/64 | 7/64 | 3/32 | 5/16 |
| 8 | 3/8 | 11/64 | 5/32 | 1/8 | 7/64 | 3/8 |
| 9 | 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 |
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Reviews
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1 to 10 of 10 Reviews
1 – 10 of 10 Reviews
Most Recent
Kennebunkport, ME
5 out of 5 stars.
Sharp and accurate; used with tapered drill
5 years ago
Makes the perfect wood screw hole with a bung countersink
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mpls,mn
2 out of 5 stars.
countersink
5 years ago
the shaft is too short....and when using the drill bit, it slips after a few turns...yes, I tightened it, but even reducing the tourqe on my drill, it still slips....called your helpline....no help. good product when it works...
Helpful?
Haines, AK
5 out of 5 stars.
Completely Satisfied
6 years ago
We use these in a production wood shop. They seem to be of higher quality than ones we've used in the past. Very happy with them.
Helpful?
Saint James, NY
5 out of 5 stars.
Excellant Countersinks
7 years ago
I've been using Fuller countersinks for sometime now; first when building my Adirondack Guideboat and now in an ongoing restoration of a vintage 1950's German Pirate Class 5m sailing dingy, They work great! The mahogany carvel planked hull is in need of much repair and these bits stay sharp and are still going strong after many, many drilling sessions. Recommend them highly.
Helpful?
Old Saybrook
2 out of 5 stars.
I would have to think about buying this product again
7 years ago
To be fair, I was applying the Lust Varnish during very hot & humid July conditions. It did not dry well ( 4 coats over 2 days - 5 days later it was still not fully cured.) I might try it in less humid conditions when I was not in a rush to get the boat in the water....I have an unopened pint to experiment with.
Helpful?
San Diego, CA
5 out of 5 stars.
Work great
12 years ago
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.
Helpful?
Versailles, KY
4 out of 5 stars.
Worked great
12 years ago
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).
Helpful?
Upstate Ny
5 out of 5 stars.
Awesome countersink
13 years ago
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.
Helpful?
Westerly, R.I.
1 out of 5 stars.
Countersink comes loose
14 years ago
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.
Helpful?
Palo Alto, CA
5 out of 5 stars.
Nice way to center the countersink
16 years ago
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.
Helpful?
Questions
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1 - 10 of 10 Questions
Q: is a drill bit #12 for a #12 screw?
4 years ago1 Answer
A: yes
4 years agoHelpful?
Q: Does the Fuller C8 drill plug bit use a 3/8 bung or a 7/16 bung?
4 years ago4 Answers
A: 3/8""! That's the one I use most often.
4 years agoHelpful?
Q: Can Fuller countersinks be sharpened?
5 years ago7 Answers
A: Yes. You can do it on a sharpening wheel, but you need to take care to maintain the bevels correctly. I have some I have been using (and sharpening) for 40 years.
5 years agoHelpful?
Q: Hello, What is recommended for use with self tapping S/S #8 wood screws (tapered)? And also for #10 S/S wood screws? This is for a wood/boat building application with heads flush to the surface. I will be purchasing depth stops. Thank you.
5 years ago1 Answer
A: #8 screw is a C8 countersink 11/64 drill bit. #10 screw is a C102 countersink 13/64 drill bit.
5 years agoHelpful?
Q: Hello: I just purchased a brand new 14 pc. set of fuller countersinks.They are in an orange wood block,just like the type C,but mine say type H.The set goes from H5S to H18S.Are these the same countersink ?? are they made to use straight shank drills,or tapered shank drills ??? Thanks much. Bill G.
6 years ago1 Answer
A: H refers to High speed steel. C type are Case-hardened carbide steel. You can use either drill bit type, but the tapered bits are designed for wood or plastic applications.
6 years agoHelpful?
Q: What is the bore / countersink depth of the Type C at the collar. I need a 1/2"" diameter countersink that is 7/8"" deep using a 1/4"" bit. Which do you suggest I purchase. Thanks, Bill
7 years ago4 Answers
A: The C12 countersink only has a cut depth of roughly 1/2"" before you will run into the collar.
6 years agoHelpful?
Q: I want to cut a hole for a 1/4 inch shelf support peg. The hole should be 1/4 inch in diameter and 1/2 inch in depth, and countersunk. Can this product be used with a 1/4"" drill bit to do this? Thank you.
8 years ago1 Answer
A: Yes, the type C # C14 uses a 1/4"" drill bit and has a countersunk diameter of 1/2"".
8 years agoHelpful?
Q: I want to cut a hole for a 1/4 inch shelf support peg. The hole should be 1/4 inch in diameter and 1/2 inch in depth, and countersunk. Can this product be used with a 1/4"" drill bit to do this? Thank you. FUL-C284 TYPE C COUNTERSINK 7/8"" CUT, 1/4"" DRILL BIT, #14
8 years ago1 Answer
A: Yes, the C284 will cut a 7/8"" countersink.
8 years agoHelpful?
Q: does this come with 1/4__quote__ hex shaft for a drill?
11 years ago2 Answers
A: No, which drill bit you order determines whether or not you have a hex shank.
11 years agoHelpful?
Q: this counter sink 3/8 and 1/8 will will be fine to use in pocket hole screw #8 ?
12 years ago1 Answer
A: For a #8 screw if you're using a Taper Drill Bit, you will need the __quote__FUL-C8__quote__ and the corresponding __quote__11/64 Taper__quote__ for hard wood, for softwood you need the __quote__FUL-C7__quote__ and the __quote__5/32 Taper__quote__. If it's a straight drill bit you're using then the __quote__FUL-C5__quote__; __quote__1/8 Regular__quote__ for hardwood, and the __quote__FUL-C57__quote__; __quote__7/64 Regular__quote__ for softwood, thank you. Nathan JD Store (401)253-3840 ex130 < a href=__quote__http://store@jamestowndistributors.com__quote__ target=__quote___blank__quote__>store@jamestowndistributors.com< /a>
12 years agoHelpful?