Semperfli Nano Silk Micro Fly Tying Thread
At just 10 Denier, this Semperfli Nano Silk Micro Fly Tying Thread is considered the smallest fly tying thread available, capable of tying without build up on flies as small as size 32 while maintaining its strength. If you dare, you can split this unbelievably fine thread further, making split thread dubbing on size 32 flies a reality. Like all Nano Silk, this thread lays perfectly flat with no build up, regardless of how many loops you put on the hook. For best results, only use a ceramic bobbin holder with this thread.
| Specification | Detail |
|---|---|
| Color | White |
| Length per spool | 110 meters |
| Denier | 10 denier (32/0) |
| Breaking strain | 375g / 13oz |
| Best suited for | Hook sizes 26 and above |
FAQ
Can this thread be split for use on size 32 flies?
Yes, the thread can be split, making split thread dubbing on size 32 flies possible.
Is a ceramic bobbin holder required for this thread?
Yes, for best results, only use a ceramic bobbin holder with this thread.
What is the breaking strength of this thread?
The breaking strength is 375g / 13oz.

Joseph Nolan –
This thread works perfectly on my size 32 flies. It lays flat and doesn’t build up, even with multiple loops. I’ve been using it for several weeks and it’s still strong and consistent. The only thing I noticed is that I need to use a ceramic bobbin to avoid any tangles.
Owen Robertson –
I tried other ultra-fine threads before, but this one is truly the smallest I’ve used. It’s ideal for tiny flies and doesn’t leave any visible thread on the hook. The 10 denier strength is impressive for such a fine thread.
Ruth Jones –
Works well for small hooks, but I had to adjust my tying technique slightly. The thread is very fine and requires a steady hand. Still, it’s a great choice for detailed fly tying.