Do the holes have threads so you can screw in a bolt?

Yes. The gauge is a thin piece of plastic and each hole is threaded. There is, of course, a limited number of threads because the plastic is thin. I believe it should be used gently to avoid damaging plastic threads. I believe it will be useful for identifying whether a screw has one standard thread (such as 1/4-NC20) or another standard thread (such as 1/4-NF28), but I don't think it can be used to finely test accuracy of threads cut on a lathe. I have not had an occasion to use it yet.

what is the thickness of this gauge?

My micrometer says it's about a quarter inch. The only caveat is it is a polymer gauge, good news is that means it's durable and can flex around truly messed up screws and bolts; the bad news is it's not super precise because it's not stainless or Ti. For example it might be hard to discern a 24 vs. 28 pitch thread, but in my experience in the machine shop it determines the right threading well especially when you are trying to match a screw that's broken, old or damaged.

will this guage work for very small computer screws ?

Yes! The guage goes down to M1.4 which is much smaller than any fastener that your going to find in any computer. The guage also has inch sizes down to #0 (.060 inch). Mike

Why do they show two different kinds of cards in the picture? One says "pitch" at the top right, and the other says "drill". Which one do we get?

The pitch is for metric screws.

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Screw Thread Gauge SAE Metric w/Drill and Tap Size Chart

Product ID: 92271026

Details

Exterior Finish
Plastic
Head Style
Round
Material
Plastic
Point Style
Fein
Thread Size
0-80

📏Dual SAE & Metric range

⏱️Fast, precise thread ID

🛠️Drill & tap size guide

₩25243

Duties & taxes included

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Sold byAmazon South KoreaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🛠️ Nail every thread, every time—because precision waits for no one!

COMPACT PORTABLE DESIGN - Fits effortlessly in your pocket or tool drawer—always on hand when precision counts.
INSTANT THREAD IDENTIFICATION - Slash downtime with rapid, accurate screw size detection—no more guesswork in your workflow.
BUILT IN DRILL TAP SIZE CHART - Confidently select the perfect drill bit or tap size with integrated recommendations.
DURABLE OIL RESISTANT CONSTRUCTION - Rugged hard plastic resists grease and grime—ready for the toughest shop environments.
UNIVERSAL SAE METRIC COMPATIBILITY - Seamlessly switch between #0 to 3/4" and 1.6mm to 16mm threads for every project.

The BCP Fasteners Screw Thread Gauge is a compact, durable tool designed for fast and accurate identification of both SAE and metric screw threads, ranging from #0 to 3/4" and 1.6mm to 16mm. Featuring a built-in drill and tap size chart, it streamlines your workflow by eliminating guesswork. Constructed from oil-resistant hard plastic, this gauge is built to withstand demanding shop conditions while remaining lightweight and portable for everyday use.

Specifications

ASIN	B07K7W3NQQ
Best Sellers Rank	#17,123 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #23 in Thread Gauges
Brand	BCP Fasteners
Color	Plastic
Compatible Groove Diameter	0.75 inches
Customer Reviews	4.6 out of 5 stars 2,872 Reviews
Drive System	External Hex
Exterior Finish	Plastic
Fastener Size	No. 0
Fastener Type	Machine Screw
Finish Types	Uncoated
Global Trade Identification Number	00688938509163
Head Style	Round
Head Type	Flat
Item Diameter	1.6 millimeters
Item Highlight	Metric & SAE, #0 to 3/4" & 1.6mm to 16mm, Coarse & Fine Thread, Drill Bit & Tap Reference, Hard Plastic, Easy-Clean (BCP675)
Item Weight	9.07 g
Manufacturer	BCP Fasteners
Material	Plastic
Material Type	Plastic
Metal Type	Plastic
Model	BCP675
Number Of Items	1
Number of Packs	1
Number of Pieces	1
Part Number	BCP675
Point Style	Fein
Screw Head Style	Round
Screw Point Style	Fein
Set Screw Thread Type	Metric
Size Name	1.6mm to 16mm
Thread Class	coarse fine
Thread Coverage	Partially Threaded
Thread Size	0-80
Thread Style	Right Hand, Coarse
Thread Type	Unc, Unf
UPC	688938509163
Unit Count	1 Count

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