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Accusize Industrial Tools H.S.S. Solid Cap Screw Counterbore Set, 3 Flute, Straight Shank, 7 Pc, 508S-0007

4.3 4.3 out of 5 stars 129 ratings

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Purchase options and add-ons

Material High Speed Steel
Shank Type Straight
Brand Accusize Industrial Tools
Item Dimensions LxWxH 2.76 x 9.45 x 12.2 inches
Tool Flute Type Straight

About this item

  • Inch Set (7 PC) : 6#, 8#, 10#, 1/4'', 5/16'', 3/8'', 1/2''
  • High Speed Steel. Straight Shank.
  • Cap screw counterbores are tools that are used to create a recess in a workpiece for the head of a cap screw. You might use a cap screw counterbore when you need to attach a component to your workpiece using cap screws, and the component has a thickness that is greater than the length of the cap screw.
  • Another reason you might use a cap screw counterbore is if you want to create a flush or countersunk appearance for the heads of the cap screws on your workpiece. A cap screw counterbore allows you to create a recess in the workpiece that is sized to fit the head of the cap screw, giving the screw a flush or countersunk appearance.
  • Overall, cap screw counterbores can be useful when you need to attach components to a workpiece using cap screws, or when you want to create a flush or countersunk appearance for the heads of the cap screws on your workpiece.
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Accusize Industrial Tools H.S.S. Solid Cap Screw Counterbore Set, 3 Flute, Straight Shank, 7 Pc, 508S-0007

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Product details

  • Is Discontinued By Manufacturer ‏ : ‎ No
  • Product Dimensions ‏ : ‎ 2.76 x 9.45 x 12.2 inches; 1 Pounds
  • Item model number ‏ : ‎ 508S-0007
  • Date First Available ‏ : ‎ December 16, 2013
  • Manufacturer ‏ : ‎ Accusize Co., Ltd.
  • ASIN ‏ : ‎ B00RY558JM
  • Customer Reviews:
    4.3 4.3 out of 5 stars 129 ratings

From the brand


Product Description

Accusize Cap Screw Counterbore Set
Accusize Industrial Tools

HSS Solid Cap Screw Counterbore Set

Seven-piece set, three flute, high-speed steel, straight shank.

SKU: 508S-0007

SKU: 508S-0007

H.S.S. Solid Cap Screw Counterbore Set


Seven-piece set, three flute, high-speed steel, straight shank: 6#, 8#, 10#, 1/4", 5/16", 3/8", and 1/2"

The video has two counterbore sets. One is inch; the other is mm. It means we also supply metric cap screw counterbore set

Specification of Each Cap Screw Counterbores

Specification of 508S-0007
Cap Screw Counterbore Application Theme A

Insert a bolt?

We often need to insert a bolt into a hole on a workpiece

Cap Screw Counterbore Application Theme B

Try Accusize Solid Cap Screw Counterbores

  1. Use a center drill
  2. Use a drill bit
  3. Use a solid cap screw counterbore

Recommended Cutting Parameters for Each Cap Screw Counterbores

Recommended Cutting Parameter of 508S-0007

Compare Accusize Inch and MM Solid Cap Screw Counterbore Sets

508S-0007

Inch Set

508S-007M

MM Set

509S-0007

Inch Set, Premium

509S-007M

MM Set, Premium

Customer Reviews
4.3 out of 5 stars
129
4.1 out of 5 stars
61
4.4 out of 5 stars
58
4.4 out of 5 stars
58
Measuring System
Imperial Metric Imperial Metric
Material
High Speed Steel High Speed Steel Premium High Speed Steel Premium High Speed Steel
Size
6# to 1/2 M3, M4, M5, M6, M8, M10, & M12 6# to 1/2 M3, M4, M5, M6, M8, M10, & M12
SKU
508S-0007 508S-007M 509S-0007 509S-007M
Packaging Case
Carton Carton Aluminum Aluminum

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Customer reviews

4.3 out of 5 stars
4.3 out of 5
129 global ratings

Customers say

Customers like the quality, material and sharpness of the drill bits. For example, they mention that it's well made, works well and is good value for money. That said, some complain about the size.

AI-generated from the text of customer reviews

18 customers mention15 positive3 negative

Customers like the quality of the drill bits. They say it's well made, holds up very well, and looks nice.

"The product itself is of good quality. The reason for the 4-star review is the shipping container...." Read more

"...a number of accusize products, including their QCTP AX.. the quality is good and the value for the money is EXCELLENT.very pleased" Read more

"...Regardless, the quality was still good. I expect to use these again for more projects." Read more

"Great quality, sharp as can be...was able to do 38 holes in 3/8 steel plate with the 5/16 size....just used cutting fluid and the proper pilot hole,..." Read more

9 customers mention9 positive0 negative

Customers like the material of the drill bits. They say it works well for knife scales and the counter bores work well on aluminum.

"Works great, bits are sharp and effective. I used these on a cast iron cylinder head to do some modifications...." Read more

"Worked great on aluminum.Would be great if they'd include a durable storage case." Read more

"Have not used these for metal only for knife scales, worked very good only wish pilots were removable" Read more

"...They worked perfectly and absolutely no issues, I used these on aluminum, as well as steel. So far they have held up very well and still sharp...." Read more

9 customers mention9 positive0 negative

Customers appreciate the value of the drill bit.

"...however, for the hobbyist and limited production an excellent value for the money.. Over the years I have purchased a number of accusize..." Read more

"a quality product at a reasonable price" Read more

"...So far they have held up very well and still sharp. Excellent value." Read more

"Sharp and true, I like this set. Good price." Read more

8 customers mention8 positive0 negative

Customers are satisfied with the sharpness of the drill bits. They mention that they have held up very well, are still sharp, and effective. Some say that the cutting edges were still intact.

"Works great, bits are sharp and effective. I used these on a cast iron cylinder head to do some modifications...." Read more

"Great quality, sharp as can be...was able to do 38 holes in 3/8 steel plate with the 5/16 size....just used cutting fluid and the proper pilot hole,..." Read more

"They cut fine. However, the pilots are over sized." Read more

"...The cutting edges were still intact, so he's happy to use all of the cutters as they are...." Read more

5 customers mention0 positive5 negative

Customers are dissatisfied with the size of the drill bits. They mention that the pilots are not the correct size and the diameter was off.

"They cut fine. However, the pilots are over sized." Read more

"...accommodated the pilot hole but not the counterbore which was too small in diameter to allow the cap screwto be fitted...." Read more

"These counter bores are well made but oversize in sizes. i.e. about .010 too big. not acceptable for my work." Read more

"Got these and went to use the diameter was off would not work had to return there just not very good" Read more

Good quality product, very poor shipping container...
4 Stars
Good quality product, very poor shipping container...
The product itself is of good quality. The reason for the 4-star review is the shipping container. They were shipped in a much too large box without wrapping the high-speed steel counter-bores to prevent them from banging against each other during the shipping process. I was so disappointed when I received them knowing there would be damage to the flutes, but there was not damage to the flutes near the pilot, so they are useable, but still very unprofessional shipping practice. Other than that they are great.
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Top reviews from the United States

Reviewed in the United States on January 18, 2024
Reviewed in the United States on March 2, 2019
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4.0 out of 5 stars Good quality product, very poor shipping container...
Reviewed in the United States on March 2, 2019
The product itself is of good quality. The reason for the 4-star review is the shipping container. They were shipped in a much too large box without wrapping the high-speed steel counter-bores to prevent them from banging against each other during the shipping process. I was so disappointed when I received them knowing there would be damage to the flutes, but there was not damage to the flutes near the pilot, so they are useable, but still very unprofessional shipping practice. Other than that they are great.
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Reviewed in the United States on March 22, 2023
Reviewed in the United States on June 10, 2017
3 people found this helpful
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Reviewed in the United States on April 27, 2021
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Reviewed in the United States on September 17, 2023
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Reviewed in the United States on June 10, 2021
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Reviewed in the United States on December 6, 2021

Top reviews from other countries

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Melody
5.0 out of 5 stars Good quality
Reviewed in Canada on January 6, 2024
John T.
5.0 out of 5 stars So glad I ignored the negative reviews….
Reviewed in Canada on July 16, 2023
Customer image
John T.
5.0 out of 5 stars So glad I ignored the negative reviews….
Reviewed in Canada on July 16, 2023
Needed to make a 3/4” spacer for my lathe's tool post. Using 3/8-16 cap screws to attach the spacer to the compound slide, so needed a counterbore for the cap screws. Decided to buy the set. Was initially concerned about the 8% negative reviews… So glad I ignored them and ordered.. These things arrived well packaged (see photo) and each bore was in its own plastic sleeve (removed by me prior to photo). Not sure why people are b$**hing about the pilot being the wrong size. A 3/8-16 cap screw requires a 13/32” hole as a 3/8” is too snug - and that’s exactly what the 3/8 counterbore has. I’ve only used the 3/8” so far (see photo of spacer), but with some cutting fluid - you guys were using cutting fluid, right? - it cut through the 3/4” cold rolled steel like butter. Second item I’ve bought from the seller and both have been top notch and reasonably priced!
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Jean Leon Desgagne
4.0 out of 5 stars counter bore
Reviewed in Canada on October 1, 2023
Dave
5.0 out of 5 stars Good quality, fast delivery.
Reviewed in Canada on February 28, 2019
Pierre Lafrance
3.0 out of 5 stars Good
Reviewed in Canada on March 9, 2021