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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BCP Fasteners Screw Thread Gauge | Metric and SAE | Recommends Drill Bit & Tap Size (BCP675)

Product ID: 513302539

Details

Exterior finish
Plastic
Head style
Hex
Material
Plastic
Point style
Fein
Thread size
1 6 mm bis 16

📏Measures #0 to 3/4" & 1.6mm to 16mm

🔧Recommends drill & tap sizes instantly

🛡️Durable thick hard plastic build

€ 34.10

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Description

🛠️ Nail every measurement, every time — don’t get caught without it!

COMPACT PORTABLE - Lightweight and slim enough to fit in your shirt pocket or tool drawer — always ready when you are.
SMART SIZE RECOMMENDATIONS - Instantly know the perfect drill bit or tap size to avoid costly errors and delays.
PRECISION AT YOUR FINGERTIPS - Quickly identify screw sizes in both Metric & SAE standards for flawless projects.
TRUSTED BY PROS HOBBYISTS ALIKE - Join thousands of mechanics and DIYers who rely on this essential gauge for precision and speed.
BUILT TO LAST DESIGNED TO PERFORM - Crafted from thick, hard plastic that resists oil, grease, and wear — your shop’s reliable sidekick.

The BCP Fasteners Screw Thread Gauge (BCP675) is a durable, easy-to-clean plastic tool designed to quickly and accurately measure screw sizes from #0 to 3/4" (SAE) and 1.6mm to 16mm (Metric). It also recommends the correct drill bit or tap size, making it an indispensable tool for professionals and hobbyists seeking precision and efficiency in fastener identification.

Specifications

ASIN	B07K7W3NQQ
ASIN	B07K7W3NQQ
Best Sellers Rank	#171,351 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #37 in Thread Gauges
Brand	BCP Fasteners
Color	Black
Compatible Groove Diameter	0.08 Inches
Customer Reviews	4.6 4.6 out of 5 stars (2,721)
Customer reviews	4.6 4.6 out of 5 stars (2,721)
Date First Available	3 February 2019
Drive System	Hex
Exterior Finish	Plastic
Fastener Size	1/4" x 3/4" to 1/2" x 1" (UNC) and 6mm x 19mm to 12mm x 30mm (Metric)
Fastener Type	Sheet Metal Screws
Finish Types	Plastic Coated
Global Trade Identification Number	00688938509163
Head Type	Rundkopf
Included Components	Tool Organizers, Tool Trays
Is Discontinued By Manufacturer	No
Item Diameter	1.6 Millimeters
Item Type Name	ehf not applicable
Item Weight	0.02 Pounds
Item model number	BCP675
Manufacturer	BCP Fasteners
Manufacturer	BCP Fasteners
Material Type	Plastic
Metal Type	Plastic
Model	BCP675
Number Of Items	1
Number of Packs	1
Number of Pieces	1
Part Number	BCP675
Screw Head Style	Hex
Screw Point Style	Fein
Set Name	Machine Screws and Screws
Set Screw Thread Type	Unified National Coarse (UNC)
Size Name	1.6mm to 16mm
Thread Class	1A
Thread Coverage	Fully Threaded
Thread Size	1,6 mm bis 16 mm metrisch
Thread Style	Right Hand, Coarse
Thread Type	UNC
UPC	688938509163
Unit Count	1 Count

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€ 34.10

Duties & taxes included

In stock

Sold byAmazon GreeceDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Greece.

Secure transaction

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