The Letter 'd' in Nail Sizes

Carpenters always talk about 16d common nails or 8d finish nails or 10d sinkers, but nobody ever explains what the heck ‘d’ means. This article

3 Ways to Hang a Painting - wikiHow

trying to identify hardwood type

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What are the 5 most popular nail styles of 2020? - Quora

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3 Ways to Hang a Painting - wikiHow

How to Fix Popped Drywall Nails and Screws (DIY)

Tapcon 3/16 in. x 2-1/4 in. Phillips Flat-Head Concrete Anchors (225-Pack) 24560 - The Home Depot