Semperfli Nano Silk ‘Predator’ Thread 100D 6/0
Nano Silk is an amazing fly tying silk. No colour rub off with this new Nano Silk! Made from Gel Spun Yarn (gsp), it is the strongest fly tying yarn you will find but so thin it can be made to disappear. We use the 6/0 yarn for predator and sea fishing patterns. It is ultra strong and designed for those large flies!
Features
- Specially formulated Gel Spun Polyethylene for extra strength
- 100 Denier (100D)
- Thread Aught (or /0 sizing) 18/0
- Breaking Strain: 3,800gm / 8.4lb (strongest in test)
- Recommended hook size guide: #10 to #2/0 and larger
- Use as Pink fly tying thread
- 50m per spool
| Parameter | Value |
|---|---|
| Denier | 100D |
| Thread Size | 6/0 |
| Breaking Strength | 3,800gm (8.4lb) |
| Length per Spool | 50m |
| Material | Gel Spun Polyethylene (GSP) |
| Recommended Hook Size | #10 to #2/0 and larger |
FAQ
What is the breaking strength of the Semperfli Nano Silk ‘Predator’ thread?
The breaking strength is 3,800gm or 8.4lb, making it one of the strongest fly tying threads available.
Is this thread suitable for large flies used in predator or sea fishing?
Yes, the 6/0 size is specifically designed for large flies in predator and sea fishing patterns.
Can this thread be used for pink fly tying patterns?
Yes, it is recommended to use this thread as a pink fly tying thread.




Stephanie Parsons –
This thread holds up well under heavy fishing conditions. I’ve used it on large predator flies and it doesn’t fray or lose color. The strength is impressive and the thinness makes it almost invisible when tied. Great value for the performance.
Tracey Walsh –
I switched from regular silk to this Nano Silk and noticed a big difference in durability. It stays strong even after repeated use in saltwater. The 6/0 size works perfectly with my larger hooks.
Madeleine Parr –
Strong and reliable. The color doesn’t fade, which is a big plus. A bit harder to handle due to its thinness, but once you get used to it, it’s very effective for sea fishing patterns.
Ella Short –
Used it on a series of sea trout patterns. The thread held up during long casts and didn’t break under pressure. Very satisfied with the strength and consistency.