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Semperfli Nano Silk 50D 12/0 Copper Spool
Our editorial team reviews specifications, product data, and field-use information to keep pages accurate.
$5.79
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SKU: SNAN050CPR-886741026611
Overview
This copper fly-tying thread is built for anglers who want a fine, dependable material for detailed pattern work without giving up strength. With a 50D denier, 12/0 aught, and a stated breaking strain of 4.2 lb, it suits both small, precise flies and larger designs that need a secure finish. The 50 m spool provides a practical supply for regular tying sessions, while the copper color offers a distinctive look for a range of patterns. It is a focused choice for serious fly tyers who value a balance of strength, suppleness, and presentation.
Why Hunters Choose the Semperfli
4.2 Lb
Breaking strain supports robust fly
50d, 12/0
Thread offers a balance of
50-meter Spool
Practical length for multiple projects
Copper Color
Adds a distinctive finish to
Available Multiple
Colors and deniers for varied
Key Features
- 50D, 12/0 Nano Silk thread for fly tying applications
- Breaking strain rated at 4.2lb for robust fly construction
- Copper color adds a distinctive finish to fly patterns
- 50m spool length, equivalent to 54 yds
- Available in a range of colors and deniers
- Packaged on a spool for convenient use
Best Used For
- Fly tyers building durable patterns that need a strong, fine thread with controlled handling.
- Anglers tying micro flies where a 12/0 thread helps keep bulk to a minimum.
- Tiered fly boxes and custom color-matched patterns using a copper thread finish.
- Tyers who want a 50-meter spool for repeated bench work and ongoing projects.
- Professionals and serious hobbyists seeking a versatile thread for both small and larger fly designs.
Specifications
| Actual Spool Length M | 50m |
|---|---|
| Actual Spool Length Yds | 54 yds |
| Aught | 12/0 |
| Breaking Strain Imperial | 4.2lb |
| Breaking Strain Kg | 1.9kg |
| Denier | 50D |
| Length In Meters | 50 |
| Product Delivery Package | Spool |
| Vendor Color | Copper |
Pros
- 4.2 lb breaking strain supports robust fly tying applications
- 50D, 12/0 thread offers a balance of strength and suppleness
- 50-meter spool provides practical length for multiple projects
- Copper color adds a distinctive finish to fly patterns
- Available in multiple colors and deniers for varied fly designs
Considerations & Trade-offs
- The 50D 12/0 size is a balance point rather than a one-size-fits-all choice; it may be more thread than needed for the smallest patterns, while still being lighter than heavier tying threads.
- The copper color is a specific aesthetic choice, so it may not match every fly pattern or color scheme.
- The spool contains 50 m (54 yds), which is practical for many projects but may be limiting if you tie in high volume or use this size frequently.
- The listed breaking strain is 4.2 lb (1.9 kg), so it is important to match the thread to the demands of the pattern rather than assuming it suits every tying task.
Suggested Comparisons
- Fly tying thread
- Fly tying materials and supplies
- Fly pattern finishing materials
Suggested Accessories
- Thread for fly tying
- Fly-tying bobbin
- Fly-tying vise
- Thread conditioner
Frequently Asked Questions
What is the breaking strain of this thread?
The listed breaking strain is 4.2 lb, which is also shown as 1.9 kg.
How much thread is on the spool?
The spool contains 50 m of thread, listed as 54 yds.
What size and denier is this thread?
This product is listed as 12/0 aught and 50D denier.
What color is the thread?
The vendor color is Copper.
Is this thread suitable for different fly sizes?
The product description says it is versatile enough for both micro and large fly designs, but it does not provide more specific guidance beyond that.