Updated: 23 Feb 2025

nut and bolt thread checkers

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Updated: 23 Feb 2025

#1

Best Choice
SST Identibolt PRO ® Thread Checker with Magnetic Wall Mount | 28 Nut and Bolt Identifier Gauge | Measures #6 to ½" & 4mm to 14mm | Tight Tolerance & Industrial Grade Precision, USA Company

9.8

Stupid Simple Tools

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Why we love it

Durable and long-lasting materials.

Accurate and reliable measurements.

Compact and easy to store.

Main highlights

Precision Machining and Durable Design
Crafted from hardened steel and 6061 aluminum for lasting precision and durability.

Perfect for Professionals and DIY Enthusiasts
Ideal for accurate nut and bolt identification in diverse applications.

Highly Praised Build Quality
Customers commend its top-notch machining and robust construction.
#2

Value for Money
62 Nut and Bolt Thread Checker Standard and Metric,Bolt Size and Thread Gauge with 25 Standard & 25 Metric Bolt & 12 Drill Bit Gauge,Bolt and Nut Identifier Gauge

9.6

HONTAITUO

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Main highlights

62 Bolt and Nut Identifier Gauge:The 50 nut and bolt thread checker standard and metric quickly identifies 50 different sizes bolt and nut, bolt sizes and thread gauges including 25 metric sizes (M2 x 0.4 to M24 x 3.0), 25 standard sizes (4-40 Coarse to 1-12 Fine), 12 drill bit gauges and imperial and centimetre rulers, 0.5cm Thickened aluminium alloy plate makes it more sturdy and durable

25 Standard Thread Sizes:4-40 Coarse,6-32 Coarse,8-32 Coarse,3/16-24 Fine,10-24 Coarse,10-32 Fine,12-24 Coarse,1/4-20 Coarse,1/4-28 Fine,5/16-18 Coarse ,5/16-24 Fine ,3/8-16 Coarse ,3/8-24 Fine ,7/16-14 Coarse,7/16-20 Fine ,1/2-13 Coarse ,1/2-20 Fine ,9/16-12 Coarse ,9/16-18 Fine ,5/8-11 Coarse ,5/8-18 Fine ,3/4-10 Coarse ,3/4-16 Fine ,1-8 Coarse ,1-12 Fine

25 Metric Thread Sizes:2mm*0.4,2.5mm*0.45,3mm*0.5,3.5mm*0.6,4mm*0.7,5mm*0.8,6mm*1.0 ,7mm*1.0 ,8mm*1.0 ,8mm*1.25 ,10mm*1.0,10mm*1.25,10mm*1.5,12mm*1.0 ,12mm*1.25 ,12mm*1.5,12mm*1.75,14mm*1.5,14mm*2.0,16m*1.5 ,16m*2.0,20mm*1.5 ,20mm*2.5 ,24mm*2.0,24mm*3.0
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#3
42 Nut and Bolt Thread Checker - 19 Standard and 15 Metric Bolt Checker and 8 Drill Bit Gauge,Bolt Size and Thread Gauge,Wall-Mountable Bolt and Nut Identifier Gauge

9.5

SKABLIX

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Main highlights

【WIDE RANGE OF SIZES】The nut and bolt thread checker not only quickly identifies 34 different nut and bolt sizes, including 15 metric sizes (m4 x 0.7 to m16 x 2.0) and 19 standard sizes (6 -32 coarse to 3/4-16 fine), but also comes with 8 imperial drill gauges to meet your needs for fast and accurate identification of a wide range of thread sizes and types.

【LASER ETCHED - DURABLE & CLEAR & EASY TO READ】Our bolt identifier board utilize durable laser etching technology to ensure clear and accurate size marking numbers. This means that no matter how many times you use them, the numbers will not fade or peel off with repeated use, designed to provide you with a long-lasting and reliable experience!

【CRAFTED FROM ALUMINUM & STAINLESS STEEL】Our thread gauges are crafted from CNC machined anodized 6061 aluminum alloy and hardened SUS304 stainless steel threads to ensure high quality and durability, the surface is anodized to effectively prevent rust and corrosion, this thread gauge is carefully designed to withstand heavy use and ensure consistent strength and accuracy.
#4
SNSMBNSR 46pcs Thread Checker, Nut and Bolt Thread Checker, 24 Inch & 22 Metric Box Set Thread Gauge, Thread Checker Standard and Metric Suitable for Nut Bolt Size Finder in Narrow and Tricky Area

9.3

SNSMBNSR

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Main highlights

Three Ways To Read Size:This Thread Gauge Kit Has Three Ways to Read The Size, by Engraving The Sizes on The Thread Gauge, Printing The Sizes on the Sticker and Screen Printing the Sizes on the Foam. Each Size Printed on the Sticker Chart and Foam Corresponds to the Thread Gauge Size, When you Need to do a Thread Check, You Can See The Size More Clearly and Intuitively and Take it Out.

Convenient And Detachable Thread Gauge:46pcs Nut and Bolt thread Checker Includes 24 Inch & 22 Metric Size, Every Thread Checker is Inserted Into a Black Storage Box with a Foam Storage Rack, You Can Easily Take Out The Required Thread Gauge, Screw The Nut or Bolt Into The Thread Gauge, and Quickly Identify The Thread Size.More Convenient Than a Wire Cable Thread Checker When you're doing a Thread Check in a Narrow Area or going to the Hardware Store to Buy Missing Bolts or Nuts.

24 Inch & 22 Metric: Inch Blue Size:2-56, 4-40, 6-32, 8-32, 10-24, 10-32, 1/4-20, 1/4-28, 5/16-18, 5/16-24, 3/8-16, 3/8-24, 7/16-14, 7/16-20, 1/2-13, 1/2-20, 9/16-12, 9/16-18, 5/8-11, 5/8-18, 3/4-10, 3/4-16, 1-8, 1-12. Metric Red Size:M2X0.4, M3x0.5, M4x0.7, M5x0.8, M6x1.0, M7x1.0, M8x1.0, M8x1.25, M10x1.0, M10x1.25, M10x1.5, M12x1.25, M12x1.5, M12x1.75, M14x1.5, M14x2.0, M16x1.5, M16x2.0, M20x1.5, M20x2.5, M24x2.0, M24x3.0.
#5
44pcs Nut and Bolt Thread Checker Set Box Nut and Bolt Size Thread Gauge Box 23 Inch & 21 Metric Sizes, Bolt and Nut Identifier Gauge Tool for Size Check on Tricky and Narrow Area

9.1

MOCW

-11%

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Main highlights

【Supports Measuring in Tight Spaces】- 44 male / female bolt size and thread gauge unlike a wall mounted nut and bolt measurer or stationary nut and bolt board, each bolt and nut identifier gauge featured in our kit can be removed & used to measure thread pitch in cramped or enclosed spaces. It is a practical tool for handymen, mechanics and users who need to figure out the sizes of bolt and nuts in a short time.

【44 male female nut and bolt size checker gauges】Our nut and bolt checker set includes assortment of 44 male/female nut and bolt size checker gauges for measuring thread pitch. Use the detachable nut and bolt gauges to check, identify & verify nut and bolt size. Red gauges are metric, blue gauges are inches.

【44 Sizes: 23 imperial sizes and 21 metric sizes】- 23 imperial sizes include 6-32, 6-40, 8-32, 10-24, 10-32, 1/4-20, 1/4-28, 5/16-18, 5/16-24, 3/8-16, 3/8-24, 7/16-14, 7/16-20, 1/2-13, 1/2-20, 9/16-12, 9/16-18, 5/8-11, 5/8-18, 3/4-10, 3/4-16, 1-8 and 1-12. There are 21 metric sizes, including M3x0.5, M4x0.7, M5x0.8, M6x1.0, M7x1.0, M8x1.0, M8x1.25, M10x1.0, M10x1.25, M10x1.5, M12x1.25, M12x1.5, M12x1.75, M14x1.5, M14x2.0, M16x1.5, M16x2.0, M20x1.5, M20x2.5, M24x2.0 and M24x3.0.

-11%
#6
42 Nut and Bolt Thread Checker, Kinok Bolt Size and Thread Gauge, 19 Standard & 15 Metric Sizes & 8 Drill Bit Gauge Bolt and Nut Identifier Gauge with Inch and Centimeter Ruler Red

9.0

kinok

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Main highlights

【Wide-Ranging Sizes】Instantly identify 19 standard and 15 metric thread sizes, including Metric threads from M4 x 0.7 to M14 x 2.0 and Imperial threads from #6-32 to 1/2-20. Perfect for various hardware verification needs, this nut and bolt thread checker saves time and effort.

【Exceptional Quality】Nut and Bolt Thread Checker is made from high-grade CNC-machined 6061 aluminum alloy and stainless steel bolt , ensuring lasting durability and precision. Complies with Go & No Go Class 2B ANSI standards, making it a reliable thread checker tool for professionals and DIY enthusiasts alike.

【Easy Identification】Our thread gauge features laser-etched, easy-to-read markings for quick and accurate thread size identification. The built-in rulers with inch and centimeter scales help you measure bolt lengths effortlessly. Lightweight and portable, our bolt and nut thread checker includes pre-drilled mounting holes for convenient wall or toolbox installation.
#7
42 Nut and Bolt Thread Checker, Bolt Size and Thread Gauge, Bolt and Nut Identifier Gauge, Nut and Bolt Size Gauge with 19 Standard & 15 Metric Bolt Identifying 8 Drill Bit Gauge from #6 to 3/4"

8.8

Yayisum

-25%

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Main highlights

WIDE-RANGING SIZE DETECTION - Our nut and bolt thread checker instantly identifies 34 distinct sizes, encompassing 15 Metric thread sizes from M4 x 0.7 to M16 x 2.0, and 19 Imperial threads from #6 - 32 Coarse to 3/4 - 16 Fine. Your one-stop tool for all standard hardware identification.

MASTERFUL CRAFTSMANSHIP - Yaysium's thread checker identibolt is crafted from 6061 aluminum and features durable, easy-to-read laser-etched markings. All pillars are made from durable SUS304 and machined to the ultimate precision, ensuring each bolt and thread complies with the Go & No Go Class 2B ANSI Standard gauge.

DRILL GAUGES - This nut and bolt thread checker features 8 different size drill gauges with 4mm, 6mm, 8mm, 10mm,12mm, 14mm, 1/4inch and 1/2inch, help you gauge the drill bits quickly and easily when working with older, unmarked drill bits, or drill bits that are too small to fit the diameter markings.

-25%
#8
NAMOKA Thread Checker, Nut and Bolt Thread Checker, Thread Checker Standard and Metric, Identify 16 SAE & 15 Metric Sizes, Bolt Size Finder, Durable Aluminum Alloy & Stainless Steel Thread Gauge

8.5

NAMOKA

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Main highlights

WIDE COMPATIBILITY WITH 31 THREAD SIZES : Accurately identifies metric (M2 x 0.4 to M12 x 1.75) and standard (2-56 UNC to 1/2-20 UNF) threads. Includes smaller sizes often overlooked, making it a perfect bolt size finder for portable use, DIY tools, mechanic tools, and workshops

EFFICIENT DUAL-PANEL DESIGN : Separates small and large thread sizes for quick identification. The ergonomic design allows one-handed holding while aligning threads with the other hand. Its compact structure saves storage space, making it a practical addition to any toolbox

COMPLIES WITH AMERICAN UNIFIED THREAD STANDARD : The Namoka Thread Checker Gauge is a precision tool for accurate bolt size and thread gauge SAE and metric identification. Complies with ANSI B1.1 for 2B internal and 2A external threads, ensuring compatibility and performance. Made from SUS304 stainless steel, it offers durability and corrosion resistance for demanding environments
#9
44 Nut and Bolt Thread Checker,Bolt Size and Thread Gauge,Bolt and Nut Identifier Gauge with Metric and Standard,Inch and Centimeter Double Scale (Blue)

8.3

Tukeirt

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Main highlights

SPECIFICATION DIVERSITY: This Type 44 thread gauge, containing 44 different specifications of nuts and bolts, fully meets the measurement needs of metric and imperial threads, from 3MM×0.5 to 24MM×3.0 metric thread sizes, from 6-32 to 1-12 imperial thread sizes, with its comprehensive specification coverage and accurate measurement capabilities, to meet more diverse measurement needs. Be a part of your work.

HIGH PRECISION INSPECTION: Each product adheres to the Go & No Go Class 2B ANSI gauge standard to ensure maximum strength and accuracy for both metric and imperial threads. Accurate thread sizing is key to safety and efficiency in precision engineering and routine maintenance.

DURABLE: Thread gauge 6061 aluminum alloy, after precision CNC machining to ensure the accuracy of every detail, anodized treatment to give it a hard surface, enhance wear resistance and corrosion resistance, all thread pillars are made of SUS304 stainless steel, to ensure that they can be firmly positioned in the hole of the gauge, providing long-term stable use experience.
#10
AltitudeCraft Thread Checker, Nut and Bolt Thread Checker, Bolt Size and Thread Gauge, Bolt and Nut Identifier Gauge, Bolt Gauge

8.1

AltitudeCraft

-25%

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Main highlights

WIDE-RANGING SIZE DETECTION - Our Nut and Bolt Thread Checker instantly identifies 28 distinct sizes, encompassing Metric thread sizes from M4 x 0.7 to M14 x 2.0, and Imperial threads from #6 - 32 Coarse to 1/2 - 20 Fine. A one-stop-shop for all standard hardware verification.

MASTERFUL CRAFTSMANSHIP - Crafted with durable SUS304, all pillars are machined with ultimate precision, ensuring each bolt and thread complies with the Go & No Go Class 2B ANSI Standard gauge.

LASER-ETCHED DOUBLE SCALE - Our Bolt Size and Thread Gauge features durable laser-etched Inch and Centimeter scales on the edge, providing quick, accurate, and user-friendly identification of various thread sizes.

-25%

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Our top pick

#1

SST Identibolt PRO ® Thread Checker with Magnetic Wall Mount | 28 Nut and Bolt Identifier Gauge | Measures #6 to ½" & 4mm to 14mm | Tight Tolerance & Industrial Grade Precision, USA Company
The SST Identibolt PRO Thread Checker is a meticulously crafted tool designed for precise nut and bolt identification. Made from hardened steel and 6061 aluminum, it ensures long-lasting durability and accuracy. This tool is perfect for both professionals and DIY enthusiasts, offering a comprehensive range of 28 standard sizes for metric and imperial threads. Its magnetic detachable plates and double laser-etched rulers make it a convenient and portable solution, allowing users to measure and identify hardware with ease. Customers consistently praise its high-quality construction and precision, noting its practicality in reducing trips to the hardware store. With its ability to mount on walls or toolboxes, the Identibolt PRO is an indispensable addition to any workshop, providing reliability and efficiency for various applications. Its compact design strikes a balance between comprehensive functionality and easy storage, making it a must-have for anyone needing precise hardware identification.

nut and bolt thread checkers

SST Identibolt PRO ® Thread Checker with Magnetic Wall Mount | 28 Nut and Bolt Identifier Gauge | Measures #6 to ½" & 4mm to 14mm | Tight Tolerance & Industrial Grade Precision, USA Company

9.8

Why we love it

Main highlights

62 Nut and Bolt Thread Checker Standard and Metric,Bolt Size and Thread Gauge with 25 Standard & 25 Metric Bolt & 12 Drill Bit Gauge,Bolt and Nut Identifier Gauge

9.6

Main highlights

42 Nut and Bolt Thread Checker - 19 Standard and 15 Metric Bolt Checker and 8 Drill Bit Gauge,Bolt Size and Thread Gauge,Wall-Mountable Bolt and Nut Identifier Gauge

9.5

Main highlights

SNSMBNSR 46pcs Thread Checker, Nut and Bolt Thread Checker, 24 Inch & 22 Metric Box Set Thread Gauge, Thread Checker Standard and Metric Suitable for Nut Bolt Size Finder in Narrow and Tricky Area

9.3

Main highlights

44pcs Nut and Bolt Thread Checker Set Box Nut and Bolt Size Thread Gauge Box 23 Inch & 21 Metric Sizes, Bolt and Nut Identifier Gauge Tool for Size Check on Tricky and Narrow Area

9.1

Main highlights

42 Nut and Bolt Thread Checker, Kinok Bolt Size and Thread Gauge, 19 Standard & 15 Metric Sizes & 8 Drill Bit Gauge Bolt and Nut Identifier Gauge with Inch and Centimeter Ruler Red

9.0

Main highlights

42 Nut and Bolt Thread Checker, Bolt Size and Thread Gauge, Bolt and Nut Identifier Gauge, Nut and Bolt Size Gauge with 19 Standard & 15 Metric Bolt Identifying 8 Drill Bit Gauge from #6 to 3/4"

8.8

Main highlights

NAMOKA Thread Checker, Nut and Bolt Thread Checker, Thread Checker Standard and Metric, Identify 16 SAE & 15 Metric Sizes, Bolt Size Finder, Durable Aluminum Alloy & Stainless Steel Thread Gauge

8.5

Main highlights

44 Nut and Bolt Thread Checker,Bolt Size and Thread Gauge,Bolt and Nut Identifier Gauge with Metric and Standard,Inch and Centimeter Double Scale (Blue)

8.3

Main highlights

AltitudeCraft Thread Checker, Nut and Bolt Thread Checker, Bolt Size and Thread Gauge, Bolt and Nut Identifier Gauge, Bolt Gauge

8.1

Main highlights

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Our top pick

SST Identibolt PRO ® Thread Checker with Magnetic Wall Mount | 28 Nut and Bolt Identifier Gauge | Measures #6 to ½" & 4mm to 14mm | Tight Tolerance & Industrial Grade Precision, USA Company

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