Fly tying thread has a simple job - hold your chosen materials to the hook.
It gets more confusing after that though due to the wide variety of sizes, colors, and materials.
Size is a constant source of confusion. Just remember that 3/0 is bigger/heavier then 6/0 (making 18/0 quite tiny). For thread measured by "denier", 210D is bigger/heavier than 140D.
For more variation, gel spun diameter is different from a polyester or nylon thread. In other words 3/0 gel spun isn't the same as 3/0 polyester or nylon.
For stretch, nylon has about 25% stretch, polyester around 15% stretch, and gel spun only 3% stretch.
Danville Flat Waxed 210 Thread is an ideal general purpose tying thread. Builds up quickly and capable of high tension when tying. Good for work on...
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A strong, durable tying thread. 100 yard spool 210 Denier
Our favorite clear tying thread for a variety of flies. Useful when you want to see the materials and colors underneath the wraps; once you hit thi...
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A strong, durable tying thread. 100 yard spool 140 Denier
A versatile size thread for a wide variety of flies. Breaking strength around 2 pounds. Bump up to a heavier thread if you're tying big saltwater p...
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This is a great thread for heavy duty work. Wraps flat to reduce bulk and super strong. Great for bigger saltwater patterns as well as spinning hair.
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Approximate breaking strength 16 pounds. Great for tying bucktail jigs. 50yd. Spools
UTC Thread wax is designed for all nylon fly tying threads. It is a special light formula that prevents fraying of the thread and helps add “bite” ...
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