lifeeconomic 
Best results for drill bit for 1/4 tap
DEWALT DWADT1420 20 UNC Drill Tap, 1/4"
Greenlee DTAP1/4-20 Combination Drill and Tap Bit, 1/4-20NC
$7.39
$10.27
Amazon.com
Last update was on: July 27, 2024 2:45 am
- Complete hole drilling, tapping, deburring and countersinking in one operation with power drill saves labor and time
- Back tapered beyond tap to prevent thread damage from over-drilling
- Deburr/countersink also provided on bit beyond back taper
- Made from hardened high-speed steel vs carbon steel for longer life
- Designed to tap up to 10-gauge metal
Greenlee DTAPKIT 6-32 to 1/4-20 6-Piece Combination Drill and Tap Set
Amazon.com
Last update was on: July 27, 2024 2:45 am
- Complete hole drilling, tapping, deburring and countersinking in one operation with power drill saves labor and time
- Back tapered beyond tap to prevent thread damage from over-drilling
- Deburr/countersink also provided on bit beyond back taper
- Made from hardened high-speed steel vs carbon steel for longer life
- Designed to tap up to 10-gauge metal
6Pcs/Set Hex Shank Drill Bits HSS 4341 Combination Drill and Tap Bit Screw Tap Deburr Countersink Bit (6-32NC 8-32 NC 10-32 NC 10-24 NC 12-24 NC 1/4-20 NC)
$13.99
$19.59
Amazon.com
Last update was on: July 27, 2024 2:45 am
- 6Pcs Hex Shank Drill Bits Set Inculued Size: 6-32NC (3.5mm), 8-32NC (4.2mm), 10-32NC (5mm), 10-24NC (5mm), 12-24NC (5.7mm), 1/4-20NC (6.35mm)
- Made of High-speed Steel 4341, Hard, Rustproof, Solid and Durable.
- Suitable for Low Hardness Materials Such as Wood, Aluminium Plate, Plank, Plastic, or Sheet Iron (thickness of less than 3mm).
- One-step Processing, Drilling, Tapping, Deburring and Countersinking in One Operation, Working Efficiently and Saving Time and Labor.
6 Pcs 1/4" HSS Spiral Hex Shank Combination Drill Screw Tap Bit Set (M3-M10) with Automatic Spring Loaded Center Punch Tool – Gold
$15.99
$22.23
Amazon.com
Last update was on: July 27, 2024 2:45 am
- Material: HSS (4341) High hardness, rustproof, solid and durable
- Self-centering design: do not need additional center drilling or center punching
- Fast replacement composite cone, uses drill edged principle. Drilling and tapping in one, one-step processing, greatly save processing steps and time costs, improve working efficiency.
- Metric: M3x0.5, M4x0.7, M5x0.8, M6x1, M8x1.25, M10x1.5.Shank:1/4 inch (6.35mm) hex shank
AUTOTOOLHOME Combination Drill and Tap Bit 6-32nc 8-32nc 10-32nc 10-24nc 12-24nc 1/4-20nc Set of 6
$11.89
$16.29
Amazon.com
Last update was on: July 27, 2024 2:45 am
- Complete hole drilling, tapping, deburring and countersinking in one operation with power drill saves labor and time
- Back tapered beyond tap to prevent thread damage from over-drilling
- Deburr/countersink also provided on bit beyond back taper
- Made from hardened high-speed steel (HSS 4341) vs carbon steel for longer life
- Designed to tap up to 10-gauge metal
DEWALT DWADTQTR5SET Impact Ready 5-Piece Drill Tap Set, 1/4" Capacity
IRWIN HANSON 1/4" – 28 NF Tap and No. 3 Drill Bit Set, 80232
$7.62
$11.05
Amazon.com
Last update was on: July 27, 2024 2:45 am
- Ideal for creating and threading fasteners holes in metal
- Creates 28 threads per inch
- Drill bit constructed of high speed steel for fast and precise drilling
- Tap crafted of high carbon steel for general purpose drilling
- Includes 1 drill bit and 1 tap
HUAZHICHUN 6Pcs Drill Tap Combination Bit Set, 1/4" Hex Shank High Speed Steel Drill Bit Spiral Screw Thread Taps Drill Bits Set HSS 4341 Counter sink
$12.89
$18.17
Amazon.com
Last update was on: July 27, 2024 2:45 am
- 1. High hardness, rustproof, solid and durable.
- 2.Self-centering point, do not need assistant center drilling or center punching.
- 3.Drilling and tapping in one, one-step processing, greatly save processing steps and time costs, improve working efficiency.
- 4.Suitable for drilling, tapping, cutting on soft metal, aluminum plate, iron, etc.
- 5.Great for fast drilling, tapping,etc. And Fast replacement composite cone, uses drill edged principle.
