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Nut, Bolt & Screw Gauge (Standard & Metric) (Coarse & Fine) Diameter, Length & Thread Pitch (Green)

Nut, Bolt & Screw Gauge (Standard & Metric) (Coarse & Fine) Diameter, Length & Thread Pitch (Green)

Q: Where is the size 12? this product appears to skip 12 and go from size 10 to 1/4?

#12 is not 1/4"---imperial machine screw sizes are in 64th's--- Therefore, #12 = 12/64 = 6/32 = 3/16---NOT 1/4

Q: I thought it supposed to have thread in it

This is a thread gauge. The thread gauge is on the back side of the gauge. One of the listing pictures clearly shows this.

Q: How does this tool define internal thread pitch (e.g. nuts)?

This gauge doesn't measure "internal" threads, only external threads. It can find the size of a nut but not the thread pitch of a nut. However, if you know the size of the nut then it's pretty easy to determine the thread pitch. There's only two thread options per size so just look at the threads and you can see if it's the coarse thread or fine thread. For instance, if the gauge determines that the nut is 1/2" then your two thread options are 13 or 20. The gauge shows you that part. If the threads look fine then you have a 20 thread if it looks coarse then you have a 13 thread. Hope this helps.

Product ID: 613112968

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Details

Material
Plastic
Thread size
M22
Exterior finish
Unfinished
Manufacturer grade
Grade 2
Head style
Hex

📏Measures up to 7" / 180mm length

🔩Covers #4 to 1" & 3mm to 22mm diameters

⚙️Supports coarse & fine thread pitch

Frequently Bought Together

Marine Bolt Supply Nut, Bolt & Screw Gauge (Standard & Metric) (Coarse & Fine) Diameter, Length & Thread Pitch (Green)

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Description

🔧 Gauge your way to flawless fixes — don’t get left behind!

TRUSTED BY PROS - MarineBoltSupply branding ensures quality you can rely on every time.
DURABLE DEPENDABLE - Crafted from 1/4" thick hard plastic to withstand daily workshop demands.
ALL IN ONE THREAD CHECKER - Instantly identify coarse and fine thread pitches to avoid costly errors.
COMPACT YET COMPREHENSIVE - 8.75" x 3.25" size fits easily in your toolkit without sacrificing range.
PRECISION MEETS VERSATILITY - Seamlessly switch between standard and metric measurements for every project.

This green Nut, Bolt & Screw Gauge by MarineBoltSupply is a precision tool designed for professionals and DIYers alike. It measures fractional (standard) sizes from #4 to 1" and metric sizes from 3mm to 22mm, including lengths up to 7" (180mm). Made from durable 1/4" thick plastic, it accurately checks both coarse and fine thread pitches, making it an essential compact companion for any hardware toolkit.

Specifications

Manufacturer	Marine Bolt Supply
Part number	1-NBG
Item Weight	59 g
Item model number	1-NBG
Size	1/2 in, M22
Color	Green
Finish	Unfinished
Material	Plastic
Shape	Rectangular
Item Package Quantity	1
Number Of Pieces	1
Head Style	Hex
Cutting Diameter	22 Millimeters
Measurement System	Metric
Batteries Included?	No
Batteries Required?	No
Item diameter	22 Millimeters

Have a Question? See What Others Asked

Where is the size 12? this product appears to skip 12 and go from size 10 to 1/4?

I thought it supposed to have thread in it

How does this tool define internal thread pitch (e.g. nuts)?

Where is gauge made?

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