Like most mechanics and machinists I often need to reference a drill or tap chart to pick out the correct tap drill, clearance drill, or just to know what size a Letter U drill really is.
Until today I've either washed my hands thoroughly before opening up Machinery's Handbook or I've used a cardboard tap chart stashed in my toolbox. The problem with both of those is they're made out of paper and paper gets dirty, bent, torn and eventually wears out even when laminated. Wall charts are available, but unless you have them plastered on everything you can never see the damned thing from where you're working!
I decided it was time to do something about those grimy tap charts!
Here's a tap chart that won't tear, is easy to clean and rather hard to break, etched in .040" 3003 Aluminum.
The front side of the working prototype:
And the back side:
Hold it with greasy fingers? Wipe it off!
Drop it in a puddle of mud? Rinse it off with a hose!
Run it over with a semi? It will probably still be readable.
Heck, do all three at the same time!
In short, I'm DONE with paper and laminated cardboard drill and tap charts.

Ordering information from page 2
Hi guys,
For those who asked about size, the chart is approximately 6" x 8" and etched on both sides.
I worked out pricing today. The chart is priced at $24.50 each plus $4.75 USPS Flat Rate shipping.
Since I made this for myself, I'll be making a few minor changes to the "for sale" version, such as adding "Made in USA" to one side.
To purchase, please PM me or email me at:
The image keeps the spam bots from getting my email.
Note: As usual, my photos leave something to be desired. It isn't bent, that's just the lens.
Until today I've either washed my hands thoroughly before opening up Machinery's Handbook or I've used a cardboard tap chart stashed in my toolbox. The problem with both of those is they're made out of paper and paper gets dirty, bent, torn and eventually wears out even when laminated. Wall charts are available, but unless you have them plastered on everything you can never see the damned thing from where you're working!
I decided it was time to do something about those grimy tap charts!
Here's a tap chart that won't tear, is easy to clean and rather hard to break, etched in .040" 3003 Aluminum.
The front side of the working prototype:
And the back side:
Hold it with greasy fingers? Wipe it off!
Drop it in a puddle of mud? Rinse it off with a hose!
Run it over with a semi? It will probably still be readable.
Heck, do all three at the same time!
In short, I'm DONE with paper and laminated cardboard drill and tap charts.

Ordering information from page 2
Hi guys,
For those who asked about size, the chart is approximately 6" x 8" and etched on both sides.
I worked out pricing today. The chart is priced at $24.50 each plus $4.75 USPS Flat Rate shipping.
Since I made this for myself, I'll be making a few minor changes to the "for sale" version, such as adding "Made in USA" to one side.
To purchase, please PM me or email me at:
The image keeps the spam bots from getting my email.
Note: As usual, my photos leave something to be desired. It isn't bent, that's just the lens.
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