Uni 17/0 Trico Fly Tying Thread
Uni 17/0 Trico Thread is an extra-fine, polyester, super strong thread for small flies with a breaking strength of 4oz. Use for small patterns like tricos, baetis, mini caddis, etc.
- 200 yards per spool
- 4oz breaking strength
- 40 Denier
- White only
| Specification | Value |
|---|---|
| Thread Type | Polyester |
| Size | 17/0 |
| Breaking Strength | 4oz |
| Denier | 40 |
| Color | White |
| Length per Spool | 200 yards |
FAQ
What is the breaking strength of the Uni 17/0 Trico Fly Tying Thread?
The breaking strength is 4oz.
Is this thread suitable for small fly patterns?
Yes, it is specifically designed for small patterns such as tricos, baetis, and mini caddis.
What is the denier rating of this thread?
The thread has a denier rating of 40.

Nathan Manning –
I’ve been using this thread for my trico patterns and it holds well under tension. The fine texture matches perfectly with small flies. It’s consistent in strength and doesn’t fray easily during tying.
Jessica Martin –
Great for delicate patterns. The 40 denier makes it strong without being bulky. I’ve tied over 50 small flies with no breakages so far.
Boris Dowd –
Works well for baetis and mini caddis. A bit harder to handle than some thinner threads, but the strength is reliable. Slightly more expensive, but worth it for small patterns.