Thread Checker Set 70-Piece Metric & Inch Aluminum with Case
Thread Checker Set 70-Piece Metric & Inch Aluminum with Case
Thread Checker Set 70-Piece Metric & Inch Aluminum with Case
Thread Checker Set 70-Piece Metric & Inch Aluminum with Case
Thread Checker Set 70-Piece Metric & Inch Aluminum with Case
Thread Checker Set 70-Piece Metric & Inch Aluminum with Case
Thread Checker Set 70-Piece Metric & Inch Aluminum with Case
Thread Checker Set 70-Piece Metric & Inch Aluminum with Case
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Thread Checker Set 70-Piece Metric & Inch Aluminum with CaseThread Checker Set 70-Piece Metric & Inch Aluminum with CaseThread Checker Set 70-Piece Metric & Inch Aluminum with CaseThread Checker Set 70-Piece Metric & Inch Aluminum with CaseThread Checker Set 70-Piece Metric & Inch Aluminum with CaseThread Checker Set 70-Piece Metric & Inch Aluminum with CaseThread Checker Set 70-Piece Metric & Inch Aluminum with CaseThread Checker Set 70-Piece Metric & Inch Aluminum with Case

Thread Checker Set 70-Piece Metric & Inch Aluminum with Case

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$60.99 USD $65.35 USD
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Only 49 units left

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Description

Thread Checker Set — Match Nuts and Bolts with Color-Coded Gauges

A drawer of mixed nuts and bolts can turn a simple repair into a guessing game. This thread checker set helps DIYers, mechanics, and workshop users identify fastener threads by checking the fit against labeled gauges rather than judging size by appearance.

The set contains 70 aluminum alloy thread checkers: 33 red metric gauges and 37 blue inch gauges. Each checker has an external thread for checking nuts and an internal thread for checking bolts. Metric coverage runs from M2 to M24, corresponding to nominal diameters of 2–24 mm (approximately 0.079–0.945 in), with the specific diameter and pitch combinations listed below. These are thread sizes, not the physical dimensions of the gauges.

Use this metric and inch nut and bolt size finder to sort loose hardware, identify replacement fasteners for furniture repairs, or check threads during automotive maintenance. A handled case with a labeled foam insert keeps the gauges organized between tasks.

✅ For nuts and bolts matching the listed metric and inch thread sizes. Not for NPT pipe threads. Match both diameter and pitch; this is a thread-identification set, not a tap-and-die set.

Key Features

  • 🔩 Dual-ended thread checker set: external threads check nuts, while internal threads check bolts.
  • 🔴 33 red metric checkers cover the listed thread combinations from M2-0.4 through M24-3.0.
  • 🔵 37 blue inch checkers distinguish standard fasteners from metric hardware at a glance.
  • 🛠️ Aluminum alloy gauges feature a solid-top external-thread design shown in the product images.
  • 🔎 Double-sided etched gauge markings, printed foam labels, and a lid reference chart provide three ways to locate a size.
  • 🧰 A carry case with a handle, closing latches, and fitted foam positions keeps the set together for storage and transport.

What's in the Box

  • 33 metric thread checkers, red
  • 37 inch thread checkers, blue
  • Carry case with labeled foam insert and printed lid reference chart

Who Is This For

🔧 Home DIYers

Identify existing nut and bolt threads before choosing replacements for furniture or workshop repairs.

🚗 Automotive Repair Users

Check removable fasteners against the listed thread sizes during maintenance and parts matching.

🗂️ Workshop Organizers

Separate mixed metric and inch hardware, then label storage bins with the identified thread sizes.

Technical Specifications

Product Type Nut and Bolt Thread Checker Set
Checker Quantity 70: 33 metric and 37 inch
Gauge Material Aluminum alloy
Color Coding Red: metric; blue: inch
Checking Interfaces External thread for nuts; internal thread for bolts
Metric Sizes (diameter–pitch, mm) M2-0.4, M2.5-0.45, M3-0.5, M3.5-0.6, M4-0.7, M5-0.8, M6-1.0, M7-1.0, M8-1.0, M8-1.25, M9-1.25, M10-1.0, M10-1.25, M10-1.5, M11-1.0, M11-1.25, M11-1.5, M12-1.0, M12-1.25, M12-1.5, M12-1.75, M14-1.5, M14-2.0, M16-1.5, M16-2.0, M18-1.5, M18-2.5, M20-1.5, M20-2.5, M22-1.5, M22-2.5, M24-2.0, M24-3.0
Inch Sizes (diameter or numbered size–TPI) 1-12, 1-8, 7/8-9, 7/8-14, 3/4-16, 3/4-10, 5/8-18, 5/8-11, 9/16-20, 9/16-18, 9/16-12, 1/2-20, 1/2-13, 7/16-24, 7/16-20, 7/16-14, 3/8-24, 3/8-16, 5/16-24, 5/16-18, 1/4-28, 1/4-20, #12-28, #12-24, #10-32, #10-24, #8-36, #8-32, #6-40, #6-32, #5-40, #4-48, #4-40, #3-56, #3-48, #2-64, #2-56
Identification Labels Double-sided etched gauge markings, labeled foam insert, printed lid chart
Storage Handled carry case with fitted foam insert and latches
Excluded Thread Type NPT pipe threads

Frequently Asked Questions

How do I check a nut or bolt?

Thread a nut onto the checker's external thread, or thread a bolt into its internal thread. Start gently by hand. If the fit binds, stop and try the appropriate alternative rather than forcing the fastener.

How are the metric and inch gauges separated?

Metric gauges are red and inch gauges are blue. Each gauge has size markings, with corresponding positions labeled in the foam insert and a reference chart inside the lid.

Are the 70 pieces split between nuts and bolts?

The images identify 33 metric and 37 inch checkers. Each checker provides both an external nut-checking thread and an internal bolt-checking thread; these are not separate packs of nuts and bolts.

Does the set cover every size between M2 and M24?

No. It covers the 33 specific metric diameter and pitch combinations listed in the specifications, not every possible combination between the endpoints.

Can I check NPT pipe fittings with this set?

No. The product images expressly state that the set does not use NPT threads. Choose a suitable pipe-thread identification tool for NPT fittings.

What do the size markings mean?

Metric labels indicate nominal diameter and pitch in millimeters. Inch labels indicate fractional diameter or a numbered screw size, followed by threads per inch. Always match the complete marking, not just the diameter.

Is the storage case included?

The pictured set includes a handled carry case with fitted, labeled foam positions and a printed size chart inside the lid.

Can these gauges repair damaged threads?

No. They identify thread fit and are not cutting or thread-repair tools. Damaged threads can interfere with identification; do not force them onto a checker.

Is this set suitable for children?

This is a workshop tool containing small parts. The case carries a choking-hazard warning for children under five; keep it out of children's reach.

Organize mixed fasteners and identify matching threads before your next repair. Check the listed sizes, then equip your workshop with this 70-piece metric and inch thread checker set.

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