Best Counterbores In September 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

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

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*
• 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
• Set includes: 6#, 8#,10#, 1/4'', 5/16'', 3/8'', 1/2'' sizes

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

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

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

• 3 flute
• 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"+
• Metric set (7pc): m3, m4, m5, m6, m8, m10, m12
• High speed steel
• Straight shank

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

• 1/64" corner radius, tool diameter tolerance: +.001"/-0". shank diameter tolerance: +0"/-.001"
• For counterboring and spotfacing in applications where machine requires a smaller shank
• 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.
• Set screw to hold a pilot or drill bit in place (if you are using a pilot or drill bit)

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

• Carbide tipped

7. 7/8" Interchangeable Pilot Counterbore

• Short series
• Straight shank
• High speed steel,