Best Counterbores In October 2026

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In this Best Counterbores product guide, we’ll help you make a more informed decision and select the product with the benefits you need.

To help you in your search, we have completed this list of the Best Counterbores.

Top Rated Best Counterbores Of 2026

Rank	Product Name	Score
1	Accusize Industrial Tools 7 Pc'' H.S.S. Solid Capscrew Counterbore Set 3 Flute Straight Buy Now	9.7 Buy Now
2	DBM IMPORTS 7 Pcs HSS Solid Cap Screw Counterbore Set 6# 8 10 Buy Now	9.5 Buy Now
3	Accusize Industrial Tools H.S.S. Solid Cap Screw Counterbore Set, 3 Flute, Straight Shank Buy Now	9.1 Buy Now
4	Accusize Industrial Tools 7 Pc Metric Hss Solid Capscrew Counterbore Set, 3 Flute Buy Now	8.8 Buy Now
5	1/2" Aircraft Counterbore, Carbide Tipped, (Reduced Shank Counterbore), 1/4" Shank Diameter, 3 Flutes Buy Now	8.6 Buy Now
6	Amana Tool 55141 Carbide Tipped Shankless Counterbore with Slow Spiral #20 Screw 3/4 Buy Now	8.3 Buy Now
7	7/8" Interchangeable Pilot Counterbore Buy Now	8.1 Buy Now

1. Accusize Industrial Tools 7 Pc'' H.S.S. Solid Capscrew Counterbore Set 3 Flute Straight

• Bright finished
• Packed in solid strong wooden box
• H.s.s., straight shank
• Inch sizes: 6#, 8#,10#, 1/4'', 5/16'', 3/8'', 1/2''
• Premium quality

2. DBM IMPORTS 7 Pcs HSS Solid Cap Screw Counterbore Set 6# 8 10

• 7 pcs hss solid cap screw counterbore set 6# 8 10 1/4 5/16 3/8 1/2 sizes
• Unit weight: 2.45 lbs, box dim l x w x h (in): 4-7/8 x 8-1/4 x 1-1/2 *estimated*
• Set includes: 6#, 8#,10#, 1/4'', 5/16'', 3/8'', 1/2'' sizes
• Sizes #6: length: 3'' long, cutter dia: .242" , pilot: .150" , shank size: 7/32", sizes #8: length: 3'' long , cutter dia: 19/64" , pilot: .11/64" , shank size: 1/4", sizes #10: length: 3-1/2'' long , cutter dia: .21/64" , pilot: .13/64" , shank size: 5/
• Used for expanding general rough hole or hole processing for bolts, smooth chip flow and powerful cutting resistance because of 3 lips for regrinding, high speed steel, supplied fitted wooden box

3. Accusize Industrial Tools H.S.S. Solid Cap Screw Counterbore Set, 3 Flute, Straight Shank

• High speed steel
• Inch set (7 pc) : 6#, 8#, 10#, 1/4'', 5/16'', 3/8'', 1/2''
• Straight shank

4. Accusize Industrial Tools 7 Pc Metric Hss Solid Capscrew Counterbore Set, 3 Flute

• Metric set (7pc): m3, m4, m5, m6, m8, m10, m12
• 3 flute
• High speed steel
• Straight shank
• Shank sizes: m3-5.5mm/.218", m4-7.9mm/.312", m5-7.9mm/.312", m6-12.7mm/.500", m8-12.7mm/.500", m110-12.7mm/.500", m12-15.8mm/.625"+

5. 1/2" Aircraft Counterbore, Carbide Tipped, (Reduced Shank Counterbore), 1/4" Shank

• Set screw to hold a pilot or drill bit in place (if you are using a pilot or drill bit)
• For counterboring and spotfacing in applications where machine requires a smaller shank
• 1/64" corner radius, tool diameter tolerance: +.001"/-0". shank diameter tolerance: +0"/-.001"
• Pilot hole diameter:1/8, if using a pilot this is the shank diameter of the pilot you should choose
• Minimum cut diameter: .156" because there is a pilot hole the tool will not cut below this diameter.

6. Amana Tool 55141 Carbide Tipped Shankless Counterbore with Slow Spiral #20 Screw 3/4

• Carbide tipped

7. 7/8" Interchangeable Pilot Counterbore

• High speed steel,
• Short series
• Straight shank