People who prefer tying with UTC thread will enjoy the similarities they find in this 52 denier waxed nylon from The Fly Smith.
They have this to say about it-
This thread is brand new on the market. I have worked very closely with the manufacturer to bring you the best thread possible. This thread stays flat for much longer than other brands. It is also very strong. It is a continuous filament, lightly waxed thread, which makes it great for split thread dubbing loops.
This thread is very light, so the 74D would be closer in size to 100D in other brands.
The difference in sizes between the 74D and 52D is very miniscule.
