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A 3/8ths 24 bolt has 24 threads per inch (TPI), and a 32 thousandths (0.032) hole that has been completely bottom tapped for 3/8ths 24 fastener will have 24 x .032 or 0.768 threads in it. And yes, that isn't even one complete turn of the bolt before it bottoms out.
Most cotton is made of singles yarn meaning that strands of the cotton staple are spun to make a single thread. This thread can then used to weave fabrics. To make two-fold yarn these separate yarns from the cotton staple are then spun together again giving a very fine yarn that has effectively been 'folded together' twice. The "Cotton Count" 100 means the fabric has 100 threads per inch. So if a fabric has a high cotton count it means more threads per inch, so the threads are be finer and the fabric is of a higher quality. Many shirtmakers use cotton with between 80 and 200 threads per inch.
(9) x (number of pixels per inch)2
200
gram per inch is 1 inch of molecule contain specific gram