20 Best Counterbore Size For 1 4 20 [2024]

Are you looking for the best Counterbore Size For 1 4 20? Based on expert reviews, we ranked them. We've listed our top-ranked picks, including the top-selling Counterbore Size For 1 4 20.

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1 Socket Head Cap Screw, 1/4-20 x 1-1/4', Alloy Steel, Black Oxide, Hex Socket Coarse Thread, 1/4 inch... Socket Head Cap Screw, 1/4-20 x 1-1/4", Alloy Steel, Black Oxide, Hex Socket Coarse Thread, 1/4...
2 Socket Head Cap Screw, 1/4-20 x 1', Alloy Steel, Black Oxide, Hex Socket Coarse Thread, 1/4 inch... Socket Head Cap Screw, 1/4-20 x 1", Alloy Steel, Black Oxide, Hex Socket Coarse Thread, 1/4 inch...
3 50 Pieces 1/4-20 Threaded Inserts for Wood Nutsert Furniture Screw-in Nut 15mm Length Hex Drive 50 Pieces 1/4-20 Threaded Inserts for Wood Nutsert Furniture Screw-in Nut 15mm Length Hex Drive
4 TMAX 2 pc 1/4-20 Combination Drill and Tap Multi Use Deburr Countersink Hex Bit TMAX 2 pc 1/4-20 Combination Drill and Tap Multi Use Deburr Countersink Hex Bit
5 Socket Head Cap Screw, 1/4-20 x 1/2', Alloy Steel, Black Oxide, Hex Socket (Quantity: 100) Coarse... Socket Head Cap Screw, 1/4-20 x 1/2", Alloy Steel, Black Oxide, Hex Socket (Quantity: 100) Coarse...
6 Socket Head Cap Screw, 1/4-20 x 1 1/2', Alloy Steel, Black Oxide, Hex Socket (Quantity: 100) Coarse... Socket Head Cap Screw, 1/4-20 x 1 1/2", Alloy Steel, Black Oxide, Hex Socket (Quantity: 100)...
7 Snappy Tools 1/8 Inch x 3/8 Inch 3-Flute Flat Bottom Counterbore with TiN coated twist drill #32408 Snappy Tools 1/8 Inch x 3/8 Inch 3-Flute Flat Bottom Counterbore with TiN coated twist drill #32408
8 Big-Sert 5420 1/4-20 Oversized Inch Thread Repair Kit Big-Sert 5420 1/4-20 Oversized Inch Thread Repair Kit
9 SmallRig 15mm Rod Clamp Single Camera Rod Mount for 15mm Rods Support System, EVF Mount, LCD Light,... SmallRig 15mm Rod Clamp Single Camera Rod Mount for 15mm Rods Support System, EVF Mount, LCD...
10 Socket Head Cap Screw, 1/4-20 x 5', Stainless Steel 18-8, Hex Socket (Quantity: 25) Coarse Thread,... Socket Head Cap Screw, 1/4-20 x 5", Stainless Steel 18-8, Hex Socket (Quantity: 25) Coarse...
11 1/4'-20 x 1/4' Socket Head Cap Screw, Allen Socket Drive, 18-8 Stainless Steel, Full Thread,... 1/4"-20 x 1/4" Socket Head Cap Screw, Allen Socket Drive, 18-8 Stainless Steel, Full Thread,...
12 50PCS L Brackets Corner Brace, Heavy Duty Small Brackets, Stainless Steel Right Angle Brackets, 90... 50PCS L Brackets Corner Brace, Heavy Duty Small Brackets, Stainless Steel Right Angle Brackets,...
13 Socket Head Cap Screw, 1/4-20 x 1', Alloy Steel, Black Oxide, Hex Socket Coarse Thread, 1/4 inch... Socket Head Cap Screw, 1/4-20 x 1", Alloy Steel, Black Oxide, Hex Socket Coarse Thread, 1/4 inch...
14 Socket Head Cap Screw, 1/4-20 x 3/4', Alloy Steel, Black Oxide, Hex Socket (Quantity: 100) Coarse... Socket Head Cap Screw, 1/4-20 x 3/4", Alloy Steel, Black Oxide, Hex Socket (Quantity: 100) Coarse...
15 Meichoon Step Drill Bit 4-20mm HSS M35 Co Spiral Groove Hex Shank, Multi-Functional Drilling Tool... Meichoon Step Drill Bit 4-20mm HSS M35 Co Spiral Groove Hex Shank, Multi-Functional Drilling Tool...
16 Meichoon Forstner Drill Bits 15-35mm 5 Pcs, Carbide Forstner Bits High Speed Steel Flat Wing... Meichoon Forstner Drill Bits 15-35mm 5 Pcs, Carbide Forstner Bits High Speed Steel Flat Wing...
17 TruePower 6pcs Combination Drill (SAE) HSS Combination Drill and Tap Bit Set Metric Deburr... TruePower 6pcs Combination Drill (SAE) HSS Combination Drill and Tap Bit Set Metric Deburr...
18 Socket Head Cap Screw, 1/4-20 x 1 1/4', Alloy Steel, Black Oxide, Hex Socket (Quantity: 100) Coarse... Socket Head Cap Screw, 1/4-20 x 1 1/4", Alloy Steel, Black Oxide, Hex Socket (Quantity: 100)...
19 1/4'-20 x 7/8' Socket Head Cap Screw, Allen Socket Drive, 18-8 Stainless Steel, Full Thread,... 1/4"-20 x 7/8" Socket Head Cap Screw, Allen Socket Drive, 18-8 Stainless Steel, Full Thread,...
20 10 Pcs 90 Degree Right Angle L-Shaped Bracket, 4 Size Stainless Steel Corner Braces- 2 Pcs 80 x... 10 Pcs 90 Degree Right Angle L-Shaped Bracket, 4 Size Stainless Steel Corner Braces- 2 Pcs 80 x...
Bestseller No. 1
Socket Head Cap Screw, 1/4-20 x 1-1/4", Alloy Steel, Black Oxide, Hex Socket Coarse Thread, 1/4 inch...
  • Thread: Coarse / Full Thread / Alloy Steel / Black Oxide
  • Recommended Hex Socket Allen Key Wrench: 3/16
  • High Quality: Industrial grade steel bolts reduce corrosion and increase thread strength
  • Fits all common climbing holds: Our climbing bolts will fit in all standard climbing holds on the market today. We offer different length packs to...
  • Black Oxide is not a protective finish and will rust if exposed to moisture. Stainless Steel material is recommended for environments with moisture
Bestseller No. 2
Socket Head Cap Screw, 1/4-20 x 1", Alloy Steel, Black Oxide, Hex Socket Coarse Thread, 1/4 inch...
  • Thread: Coarse / Full Thread / Alloy Steel / Black Oxide
  • Recommended Hex Socket Allen Key Wrench: 3/16
  • Black Oxide is not a protective finish and will rust if exposed to moisture.
  • Fits all common climbing holds: Our climbing bolts will fit in all standard climbing holds on the market today. We offer different length packs to...
  • Stainless Steel material is recommended for environments with moisture
SaleBestseller No. 3
50 Pieces 1/4-20 Threaded Inserts for Wood Nutsert Furniture Screw-in Nut 15mm Length Hex Drive
  • 1/4-20 threaded inserts for woodworking applications, 15mm length, hex drive Allen key included.
  • Threaded inserts are easy to install, simply drill the appropriately sized hole and Install the inserts with the hex key provided or other optional...
  • 1/4-20 threaded inserts are the ideal solution for softwood, hardwood, plywood, MDF, and composition board.
  • Threaded inserts head diameter: 0.461" / 11.7mm, body diameter: 0.315" / 8mm, threads diameter: 0.410" / 10.4mm.
  • In Softwood, recommended drill bits for these threaded inserts are 8.5mm, 9mm, 9.5mm / 3/8". In hardwood such as white oak or maple, recommended drill...
Bestseller No. 4
TMAX 2 pc 1/4-20 Combination Drill and Tap Multi Use Deburr Countersink Hex Bit
  • 2 pc 1/4-20 Combination Drill and Tap Multi Use Deburr Countersink Hex Bit
  • Made of high speed M2 steel. For use with: steel, copper, brass, aluminum. drill, tap and deburr in one operation.
  • Drill, tap and deburr in one operation. Tapered tap design prevents thread damage from over-drilling.
  • One piece construction guarantees proper drill for tap size. | 135 self-centering split point tip. 10 gauge (3.5mm) capacity. Usage suggestions: use...
  • US-BASED CUSTOMER SERVICE: Available by chat, email, phone, or visit us at our customer service center in La Crosse, WI.
Bestseller No. 5
Socket Head Cap Screw, 1/4-20 x 1/2", Alloy Steel, Black Oxide, Hex Socket (Quantity: 100) Coarse...
  • Thread: Coarse / Full Thread / Alloy Steel / Black Oxide
  • Recommended Hex Socket Allen Key Wrench: 3/16
  • Black Oxide is not a protective finish and will rust if exposed to moisture. Stainless Steel material is recommended for environments with moisture
Bestseller No. 6
Socket Head Cap Screw, 1/4-20 x 1 1/2", Alloy Steel, Black Oxide, Hex Socket (Quantity: 100) Coarse...
  • Thread: Coarse / Partial Thread / Alloy Steel / Black Oxide
  • Recommended Hex Socket Allen Key Wrench: 3/16
  • Black Oxide is not a protective finish and will rust if exposed to moisture. Stainless Steel material is recommended for environments with moisture
SaleBestseller No. 7
Snappy Tools 1/8 Inch x 3/8 Inch 3-Flute Flat Bottom Counterbore with TiN coated twist drill #32408
  • Drive Shank: 1/4 Inch Hex Power Bit Shank
  • Drill Size: 1/8 Inch
  • Counterbore Size: 3/8 Inch
Bestseller No. 8
Big-Sert 5420 1/4-20 Oversized Inch Thread Repair Kit
  • Second time thread repair for 1/4-20 holes
  • Recommended by leading automotive manufacturers
  • Designed & Manufactured in the United States
Bestseller No. 9
SmallRig 15mm Rod Clamp Single Camera Rod Mount for 15mm Rods Support System, EVF Mount, LCD Light,...
  • ▶ Multiple Screw Holes: A standard 15mm railblock is equipped with two counterbore holes and one 1/4’’ threaded hole that can be used on any...
  • ▶ Work with Handlegrip: It can be used on new version SmallRig camera handle 1955, 1983 or 1984, and secure a 15mm rod for microphone mount or...
  • ▶ Work with 15mm Rod: Can be used a 15mm rod to connect EVF mount, microphone mount, monitor mount or any other rigs with 15mm rod clamp
  • ▶ Delicate and Portable: Made of aluminum alloy, weighs only 48 grams
  • ▶ HASSLE-FREE WARRANTY: At SMALLRIG, not only we offer high quality products,we back them up with 18-month warranty and a 30-day money back guaranty
Bestseller No. 10
Socket Head Cap Screw, 1/4-20 x 5", Stainless Steel 18-8, Hex Socket (Quantity: 25) Coarse Thread,...
  • Thread: Coarse / Partial Thread / 18-8 /
  • Recommended Hex Socket Allen Key Wrench: 3/16
Bestseller No. 11
1/4"-20 x 1/4" Socket Head Cap Screw, Allen Socket Drive, 18-8 Stainless Steel, Full Thread,...
  • Head Diameter 3/8"
  • Drive Size: 3/16"
  • Head Height 0.250"
  • Coarse Thread
  • Thread Diameter: 0.250"
SaleBestseller No. 12
50PCS L Brackets Corner Brace, Heavy Duty Small Brackets, Stainless Steel Right Angle Brackets, 90...
  • 【50 PCS L corner brackets and 100 PCS screws Included】50PCS (20x20mm/0.79x0.79 Inch) right angle small shelf brackets for wood with 100PCS screws...
  • 【Stainless Steel made and Durable】L corner brackets for wood are made of stainless steel, rust-resistant and durable, brushed finish, no burrs....
  • 【Perfect for reinforcing right angle corner joints】stainless steel small angle brackets for wood are widely applications for book shelves, chair...
  • 【Super easy to Install Metal Corner Brackets】small l brackets with screws for perfect fit fastening. You just need to drill the hole, install the...
  • 【Precise Size Stainless Steel Corner Bracket】 - Metal L Brackets :20 * 20 * 16 mm / 0.79 * 0.79 * 0.63 inch; Mount Hole Diameter: 5mm/ 0.2";...
Bestseller No. 13
Socket Head Cap Screw, 1/4-20 x 1", Alloy Steel, Black Oxide, Hex Socket Coarse Thread, 1/4 inch...
  • Thread: Coarse / Full Thread / Alloy Steel / Black Oxide
  • Recommended Hex Socket Allen Key Wrench: 3/16
  • Black Oxide is not a protective finish and will rust if exposed to moisture.
  • Fits all common climbing holds: Our climbing bolts will fit in all standard climbing holds on the market today. We offer different length packs to...
  • Stainless Steel material is recommended for environments with moisture
Bestseller No. 14
Socket Head Cap Screw, 1/4-20 x 3/4", Alloy Steel, Black Oxide, Hex Socket (Quantity: 100) Coarse...
  • Thread: Coarse / Full Thread / Alloy Steel / Black Oxide
  • Recommended Hex Socket Allen Key Wrench: 3/16
  • Black Oxide is not a protective finish and will rust if exposed to moisture. Stainless Steel material is recommended for environments with moisture
SaleBestseller No. 15
Meichoon Step Drill Bit 4-20mm HSS M35 Co Spiral Groove Hex Shank, Multi-Functional Drilling Tool...
  • M35 High Speed Steel - classic high speed steel with cobalt for proven capability and durability in drilling holes in plastic, aluminum, copper,...
  • Good Design - Hex Shank fits into power tools chuck securely and eliminates slip; two-flute design clears chips faster and allows particles to escape...
  • A necessity for family or handyman or professionals - Perfect for home repairs and light jobs such as drilling holes in plastic, aluminum, copper and...
  • Split point tip increases speed. It can automatically deburr holes while drilling to keep the drill bit clean.
  • You can use water to cooling it when it is work and it can be used for even longer.
SaleBestseller No. 16
Meichoon Forstner Drill Bits 15-35mm 5 Pcs, Carbide Forstner Bits High Speed Steel Flat Wing...
  • High-speed steel woodworking hole saw open hole neat, smooth, no tremor can sharp cutting edge improves opening speed, easy chip removal also for...
  • High speed steel shank, sturdy - Suit for drill press, pistol drill, bench drill, vertical drilling machine, hand held electric drill, stand...
  • Forstner Drill Bit Package include 5PCS, 15mm/20mm/25mm/30mm/35mm, can meet your different needs.
  • Small incision resistance, improve the opening speed, chip easy and no tremor.
  • Perfect used for mounting spherical door shoot tip, drawer; perforation on wood products , plastic products, wood and plywood etc.
Bestseller No. 17
TruePower 6pcs Combination Drill (SAE) HSS Combination Drill and Tap Bit Set Metric Deburr...
  • ▲ 6PCS 1/4 Inch Hex Shank Metric Tap and Drill Combination Bit Set HSS Deburr Countersink Bit
  • ▲ Material: High Speed Steel
  • ▲ Complete hole drilling, tapping, deburring and countersinking in one operation with power drill saves labor & time
  • ▲ Applicable to some types of carbon steel and ordinary steel, copper and aluminum magnesium alloy drilling hole.
  • ▲ Drilling and tapping 2 in 1.Suitable for wood, plank, plastic, aluminium plate or sheet iron (thickness of less than 3mm).
Bestseller No. 18
Socket Head Cap Screw, 1/4-20 x 1 1/4", Alloy Steel, Black Oxide, Hex Socket (Quantity: 100) Coarse...
  • Thread: Coarse / Full Thread / Alloy Steel / Black Oxide
  • Recommended Hex Socket Allen Key Wrench: 3/16
  • Black Oxide is not a protective finish and will rust if exposed to moisture. Stainless Steel material is recommended for environments with moisture
Bestseller No. 19
1/4"-20 x 7/8" Socket Head Cap Screw, Allen Socket Drive, 18-8 Stainless Steel, Full Thread,...
  • Head Height: 0.250"
  • Drive Size: 3/16"
  • Head Diameter: 3/8"
  • Coarse Thread
  • Thread Diameter: 0.250"
Bestseller No. 20
10 Pcs 90 Degree Right Angle L-Shaped Bracket, 4 Size Stainless Steel Corner Braces- 2 Pcs 80 x...
  • 🔨Stainless Steel Corner Brackets Set: 10 Pcs corner brackets, 36 Pcs screws; 4 size corner brackets include 80x 80mm, 65x 65mm, 40x 40mm, 20x20mm....
  • 🔨Sturdy & Durable: Our right angle brackets and screws are made of high quality stainless steel to smooth surface, strong carrying capacity....
  • 🔨Easy To Use: The steps to install the corner brackets are easy. Firstly, use a drill to dig a hole on the wall or board and then install the...
  • 🔨Special Design: Our bracket is different from the bracket on the market, our brackets have perfect thickness and surface drawing treatment,...
  • 🔨Wide Application: Small size can play a very big role. Widely used in furniture, such as tables and chairs, cabinets, wardrobes, flower stands...

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FAQ:

Q: What is a counterbore bit used for?

A: After the hole for the bolt or screw has been drilled, this counterbore is used to cut a larger hole around the first one. The counterbore shaft must be the same diameter as the bit used to drill the original hole, as it will guide the cutter to make a perfectly centered round recess.

Q: What does countersink and counterbore mean?

A: A countersink is a cone-shaped hole that is cut into the PCB to allow the flat head of a socket cap screw to fit flush with the surface of the board. A counterbore is a cylindrical flat-bottomed hole that is designed to house a hex head or socket head cap screw to be used to secure a PCB board.

Q: What is a countersink and counterbore?

A: A countersink produces a conical hole matching the angle of the screw so that when the screw is fully engaged the head will sit flush or slightly below the surface. A counterbore is used to enlarge the opening of a hole producing a flat bottom so a socket-head screw will fit flush with the surface of the part.