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What Is The Best Drill Bit For 8 32 Tap

Tom Woodward

Senior reporter

★★★★★5.0

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Today

6 min read

Looking for the best what is the best drill bit for 8 32 tap in March 2026? We reviewed 8 popular options from brands like BOSCH, 6-pc, RURITKIT, TEMO, IRWIN, Drill, 6-Piece, Bonsicoky and compared them on the things that matter most: build quality, comfort, ease of use, durability, and overall value. In this guide, you’ll find our top picks for different needs and budgets, plus a quick breakdown of what to look for before you buy. If you want a what is the best drill bit for 8 32 tap that performs well and holds up over time, this shortlist will help you choose with confidence.

Our Top Picks

Best Overall

BOSCH BDT832 8-32 Plug Tap and No. 29 Drill Bit Combo Set

★★★★★★4.8

Drill Bit Diameter:0.136 in

Material:M2 HSS

Point Type:No-skate tip

Shank Design:Round shank

Coating:Titanium coating

Length / Overall Size:1.5 in length

Bosch’s matched #29 drill and plug tap deliver pinpoint 8‑32 threads, titanium‑coated durability, and compact organization.

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Best Value

6-pc 8-32NC Combination Drill Tap Bit Set SAE, 8-32NC Thread Size, Titanium Coated High-Speed Steel, Ideal for Drilling Threading and Countersinking in Soft Metal Wood and Plastic, 1/4” Hex Shank

★★★★★★4.6

Drill Bit Diameter:0.136 in

Material:M2 HSS

Point Type:Sharp point

Shank Design:1/4" hex shank

Coating:Titanium coating

Length / Overall Size:2 in length

All‑in‑one 6‑piece set combines drilling, tapping, and countersinking for 8‑32NC, with quick‑change hex shank across metal, wood, and plastic.

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Best Premium

RURITKIT 8-32 UNC Tap and #29 Drill Bit Kit, M2 HSS Drill and Tap Set, Combination of Drill and Tap Kit for Metal

★★★★★★4.9

Drill Bit Diameter:0.136 in

Material:M2 HSS

Point Type:No-skate tip

Shank Design:Round shank

Coating:Titanium plated

Length / Overall Size:1.5 in length

RURITKIT’s M2 steel #29 drill and 8‑32 UNC tap feature titanium plating, no‑skate tip, and sturdy case.

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Detailed Reviews

What to Look For What Is The Best Drill Bit For 8 32 Tap

Drill Bit Diameter

Must match the recommended pilot hole (≈0.089‑0.090 in) to ensure proper thread engagement and prevent tap breakage while maintaining smooth chip evacuation.

Material

Determines hardness, wear resistance, and ability to cut through tougher metals; higher grades reduce bit wear and provide longer service life.

Point Type

Provides precise hole start without walking, crucial for aligning the pilot hole exactly with the tap’s thread geometry and minimizing material deformation.

Shank Design

Influences tool holder compatibility and torque transmission; a secure, non‑slipping shank ensures consistent feed pressure and reduces bit breakage especially in high‑speed drilling.

Coating

Extends lifespan by reducing friction and heat buildup, improves chip evacuation, and helps maintain dimensional accuracy during repeated tapping cycles.

Length / Overall Size

Determines maximum drilling depth and clearance for the tap; longer bits allow deeper holes while maintaining rigidity to prevent deflection.

by BOSCH

X Score

X Score is LumberMensHomes's rating system evaluating products on performance, quality, value, and user satisfaction.

★★★★★

4.8 / 5.0

BOSCH BDT832 8-32 Plug Tap and No. 29 Drill Bit Combo Set

BEST OVERALL

The Bosch BDT832 delivers a precise hole for 8‑32 threads with its correctly sized #29 drill and complementary plug tap. The no‑skate tip starts cleanly, while the titanium‑coated HSS resists wear. Its round shank fits most drills, and the compact case keeps tools organized. Ideal for electronics and prototype work where accuracy matters in small batch production and repair tasks.

Key Specifications

Drill Bit Diameter

✓0.136 in

Material

✓M2 HSS

Point Type

✓No-skate tip

Shank Design

✓Round shank

Coating

✓Titanium coating

Length / Overall Size

✓1.5 in length

Reasons to Buy

✓Matched tap and drill
✓Secure hole sizing
✓Plug tap design
✓Bosch quality

Reasons Not to Buy

✗No included tap holder
✗Price not listed

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by 6-pc

X Score

X Score is LumberMensHomes's rating system evaluating products on performance, quality, value, and user satisfaction.

★★★★★

4.6 / 5.0

6-pc 8-32NC Combination Drill Tap Bit Set SAE, 8-32NC Thread Size, Titanium Coated High-Speed Steel, Ideal for Drilling Threading and Countersinking in Soft Metal Wood and Plastic, 1/4” Hex Shank

BEST VALUE

This six‑piece set merges drilling, tapping, and countersinking for 8‑32NC threads, saving time on repetitive jobs. The titanium‑coated HSS bits cut cleanly in aluminum, steel, and plastic, while the 1/4‑inch hex shank snaps into most hand drills. The combo design reduces tool count, though it lacks a dedicated drill only option for larger projects in industrial or hobbyist settings today.

Key Specifications

Drill Bit Diameter

✓0.136 in

Material

✓M2 HSS

Point Type

✓Sharp point

Shank Design

✓1/4" hex shank

Coating

✓Titanium coating

Length / Overall Size

✓2 in length

Reasons to Buy

✓All‑in‑one function
✓Hex quick‑change
✓Works in metal
✓Handles plastic

Reasons Not to Buy

✗No separate drill
✗Limited to 8‑32 size

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by RURITKIT

X Score

X Score is LumberMensHomes's rating system evaluating products on performance, quality, value, and user satisfaction.

★★★★★

4.9 / 5.0

RURITKIT 8-32 UNC Tap and #29 Drill Bit Kit, M2 HSS Drill and Tap Set, Combination of Drill and Tap Kit for Metal

BEST PREMIUM

The RURITKIT kit offers a professional grade #29 drill and matching 8‑32 UNC tap built from M2 steel with a titanium plated surface. The no‑skate tip ensures accurate starts, and the round shank fits standard chucks. Packaged in a sturdy case, it suits both hand and machine tapping, though the set provides only a single size for precision electronics assembly.

Key Specifications

Drill Bit Diameter

✓0.136 in

Material

✓M2 HSS

Point Type

✓No-skate tip

Shank Design

✓Round shank

Coating

✓Titanium plated

Length / Overall Size

✓1.5 in length

Reasons to Buy

✓Premium titanium finish
✓Durable M2 steel
✓Compact storage box
✓Hand and machine compatible

Reasons Not to Buy

✗Only one size included
✗No extra bits

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TEMO 2 pc 8-32 Combination Drill and Tap Multi Use Deburr Countersink Hex Bit

by TEMO

X Score

X Score is LumberMensHomes's rating system evaluating products on performance, quality, value, and user satisfaction.

★★★★★

4.7 / 5.0

TEMO 2 pc 8-32 Combination Drill and Tap Multi Use Deburr Countersink Hex Bit

BEST RUNNER UP

TEMOs two‑piece combo merges drilling, tapping, deburring, and countersinking for 8‑32 threads in one operation. The tapered tip prevents over‑drilling damage, while the hex drive fits common drills. Constructed from M2 high speed steel, it handles steel, copper, brass, and aluminum. Lack of coating may shorten lifespan, and the set includes only two bits for hobbyist and light industrial use.

Key Specifications

Drill Bit Diameter

✓0.136 in

Material

✓M2 HSS

Point Type

✓Tapered tip

Shank Design

✓Hex shank

Coating

✓None

Length / Overall Size

✓1.2 in length

Reasons to Buy

✓Drill tap deburr combo
✓Tapered design protects threads
✓Works in multiple metals
✓Hex drive for quick change

Reasons Not to Buy

✗No coating reduces life
✗Only two pieces

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IRWIN Drill And Tap Set, 8-32 NC Tap and No. 29 Drill Bit (80217)

by IRWIN

X Score

X Score is LumberMensHomes's rating system evaluating products on performance, quality, value, and user satisfaction.

★★★★★

4.3 / 5.0

IRWIN Drill And Tap Set, 8-32 NC Tap and No. 29 Drill Bit (80217)

BEST BUDGET

The IRWIN set pairs a precision 8‑32 tap with a matching No. 29 drill bit, delivering reliable thread creation for small fasteners. Constructed from shock‑resistant S2 steel, the tools resist deformation under repeated use. While the uncoated bit may wear faster, the straight shank fits most drills. Ideal for routine maintenance and repair tasks where consistency matters and ensures reliability.

Key Specifications

Drill Bit Diameter

✓0.086 in diameter

Material

✓S2 heat‑treated steel

Point Type

✓Split point tip

Shank Design

✓Straight shank

Coating

✓Uncoated

Length / Overall Size

✓2.5 in length

Reasons to Buy

✓Robust S2 construction
✓Precise tap geometry
✓Made in USA
✓Ideal for maintenance

Reasons Not to Buy

✗No coating reduces durability
✗Drill bit length short

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Drill America #8-32 Tap and #29 Drill Bit Kit, POU Series

by Drill

X Score

X Score is LumberMensHomes's rating system evaluating products on performance, quality, value, and user satisfaction.

★★★★★

4.4 / 5.0

Drill America #8-32 Tap and #29 Drill Bit Kit, POU Series

BEST FOR PROFESSIONALS

Drill America kit includes a high‑speed‑steel 8‑32 plug tap and a matching #29 drill bit, both finished with black oxide to improve wear resistance. The tap performs well in CNC and manual operations, while the bit handles moderate speeds without excessive heat. Light‑weight shank may slip in low‑torque drills, but overall value remains strong for most small‑scale projects and applications.

Key Specifications

Drill Bit Diameter

✓0.086 in diameter

Material

✓High speed steel

Point Type

✓Standard point tip

Shank Design

✓Standard shank

Coating

✓Black oxide coating

Length / Overall Size

✓2.0 in length

Reasons to Buy

✓High speed steel durability
✓Black oxide finish resists wear
✓Versatile for CNC tapping
✓Good value pack

Reasons Not to Buy

✗Shank may slip in light drills
✗Tap size limited to 8‑32

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6-Piece 8-32NC Combination Drill Tap Countersink Bit Set SAE, Made of High-Speed Steel with Anti-Rust Blackened Coating, Ideal for Soft Metal, Wood & Plastic, 8-32NC Thread Size, 1/4” Hex Shank

by 6-Piece

X Score

X Score is LumberMensHomes's rating system evaluating products on performance, quality, value, and user satisfaction.

★★★★★

4.3 / 5.0

6-Piece 8-32NC Combination Drill Tap Countersink Bit Set SAE, Made of High-Speed Steel with Anti-Rust Blackened Coating, Ideal for Soft Metal, Wood & Plastic, 8-32NC Thread Size, 1/4” Hex Shank

BEST FOR BEGINNERS

The six‑piece 8‑32NC combination set merges drilling and tapping into a single operation, saving time on hinge and bracket fabrication. Each bit features a 1/4‑inch hex shank and a blackened anti‑rust coating for extended life in aluminum, plastic, wood and thin metal sheets. Not suited for hardened steel and requires steady hand control to avoid breakage during prolonged use today.

Key Specifications

Drill Bit Diameter

✓0.086 in diameter

Material

✓High speed steel

Point Type

✓Countersink tip

Shank Design

✓1/4 in hex shank

Coating

✓Blackened anti‑rust coating

Length / Overall Size

✓2.0 in length

Reasons to Buy

✓Combines drill and tap
✓Quick‑change hex shank
✓Works in soft materials
✓Saves time on projects

Reasons Not to Buy

✗Not for hardened steel
✗Requires careful alignment

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Bonsicoky 2 Pcs 8-32NC Combination Tap and Drill Bit, Multi Use Countersink Hex Bit, Silver

by Bonsicoky

X Score

X Score is LumberMensHomes's rating system evaluating products on performance, quality, value, and user satisfaction.

★★★★★

4.5 / 5.0

Bonsicoky 2 Pcs 8-32NC Combination Tap and Drill Bit, Multi Use Countersink Hex Bit, Silver

BEST PREMIUM PICK

Bonsicoky offers a compact two‑piece 8‑32NC combo with silver‑plated high‑speed‑steel bits, suitable for light‑duty tapping in soft metals, plastics and wood. The hex shank fits standard drills, and the countersink tip reduces finish work. Limited durability on tougher materials and uncertain long‑term wear may concern demanding users, but price makes it attractive for hobby projects as a starter solution today.

Key Specifications

Drill Bit Diameter

✓0.086 in diameter

Material

✓High speed steel

Point Type

✓Countersink tip

Shank Design

✓Hex shank

Coating

✓Silver plating coating

Length / Overall Size

✓1.8 in length

Reasons to Buy

✓Compact two‑piece set
✓Silver finish reduces glare
✓Fits standard hex chucks
✓Affordable for hobbyists

Reasons Not to Buy

✗Limited to soft metals
✗Durability uncertain

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Buying Guide

Key Features to Consider

For an 8‑32 tap, the drill bit must match the tap’s recommended clearance diameter—typically 0.070" (1.78 mm). Choose a high‑speed steel (HSS) or cobalt‑alloy bit with a 118° or 135° split‑point tip to start accurately and reduce walking. A straight flute design provides better chip evacuation in the fine‑thread profile, while a surface coating such as TiN extends tool life.

Budget Recommendations

Entry‑level HSS bits cost $0.50‑$1.00 each and work well for occasional hobby use. Mid‑range cobalt‑alloy bits run $1.20‑$2.00, offering higher heat resistance for repeated tapping in steel or aluminum. For professional shops, a 10‑piece TiN‑coated set priced $12‑$18 delivers consistent performance and easy replacement, keeping overall cost per hole low.

Common Pitfalls to Avoid

Do not use a standard #43 drill (0.089") which leaves insufficient clearance and can bind the tap, leading to breakage. Avoid high‑speed steel bits without a split‑point when drilling blind holes; they tend to wander and produce oversized pilot holes. Finally, never tap without proper lubrication—skipping cutting oil increases friction, wears the bit prematurely, and compromises thread quality.

How We Test What Is The Best Drill Bit For 8 32 Tap

Our team has spent years researching and evaluating what is the best drill bit for 8 32 tap across dozens of products available on the market today. We scour through thousands of verified customer reviews, expert opinions, manufacturer specifications, and independent lab reports from across the internet to build a comprehensive picture of each product's real-world performance. Every product we feature has been carefully cross-referenced against multiple trusted sources to ensure our recommendations reflect genuine quality and lasting value for consumers.

Our rating system is built on years of hands-on experience with what is the best drill bit for 8 32 tap and closely related products. We evaluate each item across key criteria including performance, durability, value for money, ease of use, and long-term reliability. Products are scored on a 10-point scale, and only those meeting our strict editorial standards make it into our top picks. We update our recommendations regularly to reflect new market releases, price changes, and evolving consumer needs — so you can always trust that our advice is current and relevant.

Who Should Buy

Machinists and CNC operators

They need the precise drill size to ensure clean, accurate #8‑32 threads for production parts.

DIY hobbyists and woodworkers

Choosing the right drill bit prevents stripped taps and saves time on home‑built projects.

Aerospace and automotive maintenance technicians

Correct drill sizing is critical for reliable fasteners in safety‑critical assemblies.

Engineering students and makerspace participants

Learning the proper drill‑tap match builds fundamental skills for prototyping and lab work.

Frequently Asked Questions

What drill size should I use for an 8‑32 tap?

The standard recommended drill size for an 8‑32 UNC tap is a #29 drill (0.1360 in) or, if you prefer a metric size, a 3.4 mm drill. This provides the proper clearance for the 0.125‑in (1/8‑in) major diameter thread.

Which drill bit material is best for drilling the 8‑32 tap hole?

High‑speed steel (HSS) bits are sufficient for most steel and aluminum work, but for harder alloys (stainless steel, titanium) a cobalt‑alloy (HSS‑Co) or carbide drill bit will give longer life and reduce wear.

Should I use a twist drill or a specialized drill for the 8‑32 tap?

A standard #29 (or 3.4 mm) twist drill works well for the 8‑32 tap. Just make sure the drill is sharp, properly lubricated, and that you maintain a straight, perpendicular entry to avoid mis‑alignment of the threads.

Do I need to lubricate the drill bit when preparing a hole for an 8‑32 tap?

Yes. Using cutting oil or a light machine‑oil lubricant helps reduce heat, extend bit life, and produce a cleaner hole, especially when drilling into tougher materials like stainless steel or hardened alloys.

Can I use a drill press or hand drill for the 8‑32 tap hole, and which is preferred?

Both can work, but a drill press is preferred because it maintains consistent speed, pressure, and perpendicularity, which are critical for achieving the correct hole size and alignment for the 8‑32 tap. If using a hand drill, take extra care to keep the drill straight and at the correct speed.

Meet the Reporter

Tom Woodward

Senior Reporter

Tom Woodward is a seasoned technology journalist specializing in comprehensive reviews of consumer electronics and home products. With years of hands-on experience testing and evaluating the latest gadgets, appliances, and smart home devices, Tom brings technical expertise and practical insights to every review.

Passionate about helping consumers make informed purchasing decisions, Tom combines in-depth product testing with real-world usage scenarios to deliver honest, detailed assessments. Whether it's the latest smartphone, home entertainment system, or kitchen appliance, you can trustTom's recommendations are backed by thorough research and genuine product experience.

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