DRA Qualtech DEWCBR3/16 3/16 X 3/32 Pilot Hole HSS Straight Shank Counterbore P13389221DRA-DEWCBR3-16 https://cdnimages.opentip.com/full/DRA/DRA-DEWCBR3-16.jpg Qualtech DEWCBR3/16 3/16 X 3/32 Pilot Hole HSS Straight Shank Counterbore Manufacturer Part Number: dewcbr3/16Counterboring is the enlargement of a portion of a hole that has previously been formedIf the counterbored portion is shallow (1/8\"\" or less), the operations is usually known as spot-facing; for example, a flat seat for a bolt head or nutIf the hole is enlarged to a considerable depth, it is designated as counterboringSize :3/16\"Overall Length :3\"Material :High Speed SteelFinish :Uncoated (Bright)Shank Size :15/64\"Decimal Equivalent :0.1875Metric Equivalent :4.7625mmShank Type :Round 13389221 887861128902 1.0000lbs 0.00 0.00 0.00

Qualtech

16.45 2025-05-01 66 In Stock Qualtech DEWCBR3/16 3/16 X 3/32 Pilot Hole HSS Straight Shank Counterbore

customer review - by Hamm, July 7, 2023

5/ 5stars

Very good product at an excellent price.

customer review - by Glenn S., October 10, 2021

4/ 5stars

I bought this counterbore to repair a damaged crown on an M1 carbine. I turned a brass pilot to fit the bore properly and this did a great job. I used plenty of cutting oil and went slow and steady. It pulled nice chips and left a nice finish. I'd guess a 16 to 32 Ra. I did not expect this from a $20 counterbore. I thought I would have to finish lap it. Nope. The pilot hole was rough and oversized. It was advertised as 5/32 but measured .164 with pin gauges. Might not work with standard pilots.

customer review - by Kenneth Olsen, August 8, 2021

4/ 5stars

First I have not used it yet. The one that I used survived the 220 holes that I had to countersink into the mild steel bars that I was milling. So once I put it to use I will update my response. The only disappointment is that it does not have a hole the diameter of the pilot through the tool. This comes in handy once in a while if the pilot just does not easily removable.

Qualtech DEWCBR3/16 3/16 X 3/32 Pilot Hole HSS Straight Shank Counterbore

Rating 4.5 | 3 reviews

Brand Qualtech

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UPC: 887861128902

SKU: DRA-P-383

Price:

$16.45Free shipping on orders over $350 on select DRA- items. Details

Size:

Quantity:

66 In Stock

1"	- + Stock: 29 $38.23
1-1/16"	- + Stock: 3 $43.86
1-1/2"	- + Stock: 4 $73.08
1-1/4"	- + Stock: 4 $56.21
1-1/8"	- + Stock: 21 $45.71
1-11/16"	- + Stock: 9 $107.06
1-13/16"	- + Stock: 10 $117.84
1-15/16"	- + Stock: 13 $133.22
1-3/16"	- + Stock: 12 $47.89
1-3/4"	- + Stock: 9 $107.06
1-3/8"	- + Stock: 9 $63.97
1-5/16"	- + Stock: 10 $63.97
1-5/8"	- + Stock: 3 $99.56
1-7/16"	- + Stock: 7 $71.70
1-7/8"	- + Stock: 7 $117.84
1-9/16"	- + Stock: 1 $99.56
1/2"	- + Stock: 131 $20.82
1/4"	- + Stock: 166 $17.71
11/16"	- + Stock: 60 $27.28
11/32"	- + Stock: 31 $18.60
13/16"	- + Stock: 30 $29.03
13/32"	- + Stock: 28 $19.69
13/64"	- + Stock: 17 $18.88
15/16"	- + Stock: 21 $31.90
15/32"	- + Stock: 55 $20.82
15/64"	- + Stock: 4 $18.88
17/32"	- + Stock: 42 $23.14
17/64"	- + Stock: 5 $18.88
19/32"	- + Stock: 11 $24.68
19/64"	- + Stock: 21 $19.63
2"	- + Stock: 4 $135.73
2-1/2"	- + Out of stock$214.55
2-1/4"	- + Stock: 2 $187.75
2-3/4"	- + Stock: 3 $280.24
2-7/8"	- + Out of stock$291.58
21/32"	- + Stock: 21 $27.28
21/64"	- + Stock: 4 $20.30
23/32"	- + Stock: 51 $28.36
23/64"	- + Stock: 3 $20.30
25/32"	- + Stock: 23 $29.94
25/64"	- + Stock: 9 $20.83
27/32"	- + Stock: 53 $31.86
27/64"	- + Stock: 4 $20.83
29/32"	- + Stock: 3 $31.90
29/64"	- + Stock: 10 $22.28
3"	- + Stock: 2 $302.35
3/16"	- + Stock: 66 $16.45
3/4"	- + Stock: 144 $28.36
3/8"	- + Stock: 193 $18.60
31/32"	- + Stock: 13 $38.23
31/64"	- + Stock: 11 $22.28
33/64"	- + Stock: 16 $25.09
35/64"	- + Stock: 8 $26.11
37/64"	- + Stock: 2 $27.36
39/64"	- + Stock: 2 $27.36
41/64"	- + Stock: 11 $29.22
43/64"	- + Stock: 8 $29.22
45/64"	- + Stock: 9 $29.94
47/64"	- + Stock: 3 $29.94
49/64"	- + Stock: 11 $31.80
5/16"	- + Stock: 95 $18.14
5/8"	- + Stock: 21 $24.68
51/64"	- + Out of stock$31.80
53/64"	- + Stock: 1 $33.90
55/64"	- + Stock: 5 $33.90
57/64"	- + Stock: 8 $34.79
59/64"	- + Stock: 24 $34.79
61/64"	- + Stock: 9 $38.38
63/64"	- + Out of stock$39.98
7/16"	- + Stock: 43 $19.69
7/32"	- + Stock: 30 $16.45
7/8"	- + Stock: 24 $30.40
9/16"	- + Stock: 97 $23.14
9/32"	- + Stock: 3 $17.71

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Pricing Note

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Product Description

Manufacturer Part Number: dewcbr3/16

Counterboring is the enlargement of a portion of a hole that has previously been formed

If the counterbored portion is shallow (1/8"" or less), the operations is usually known as spot-facing; for example, a flat seat for a bolt head or nut

If the hole is enlarged to a considerable depth, it is designated as counterboring

Size

3/16"

Overall Length

Material

High Speed Steel

Finish

Uncoated (Bright)

Shank Size

15/64"

Decimal Equivalent

0.1875

Metric Equivalent

4.7625mm

Shank Type

Round

Attention CA Residents: Prop 65 Warning

WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, go to www.p65warnings.ca.gov.

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By Hamm