Semperfli Nano Silk 50D 12/0 Black
 Semperfli Nano Silk 50D 12/0 BlackSemperfli Nano Silk 50D 12/0 Black 

Semperfli Nano Silk 50D 12/0 Black

  (28 Reviews)
Our Price:  £3.75Earn 3 Loyalty Points

Packing Weight:  7 g



In Stock

Our Part Number:  SNAN050BLK
Bar Code:  886741026598
Manufacturer Part Number:  SNAN050BLK
Brand:  Semperfli
Denier:  50D
Aught:  12/0
Actual Spool Length M:  100m
Actual Spool Length Yds:  109 yds
Breaking Strain Kg:  1.9kg
Breaking Strain Imperial:  4.2lb
Tying Material Color:  Black
Length in Meters:  100
Product Delivery Package:  Spool

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Semperfli Nano Silk 50D 12/0 Black

Nano Silk 50D 12/0 Black is regarded as the tying thread of choice of professional fly tyers worldwide and is the best GSP thread on the market! Being so super strong and available in such a variety of colors and deniers it has endless possibilities and can be used for micro flies to large flies.

Nano Silk 50D 12/0 Black is ideal for your smaller flies and the 50d, also known as 12/0, having a wide range of colors in it, there is plenty of choice for you.

Super strong, this is the highest quality thread available. Never worry about snapping your tying thread again you can rely on Nano Silk.

50d is also known as 12/0 is the go to GSP thread. Nano Silk 50D 12/0 Black has all the strength you would expect from this premier thread. It is 10 times stronger than steel of the same diameter! Nano Silk 50D 12/0 Black is fine enough for size 16 to 32 flies whilst still retaining its strength. Although Nano Silk 50D 12/0 Black is a fine thread it can be split down further if required so dubbing making dubbing much easier!

Nano Silk 50D 12/0 Black is designed for flies sizes 8 to 16, the ideal for most fly tyers. However do not be fooled because of Nano 50D thin diameter, Nano Silk 50D 12/0 Black is stronger than 6/0 polyester thread yet is less than 1/20th of the diameter. As a result it can be used for any fly where you do not want to see your thread.

Because Nano Silk lays perfectly flat you get no thread build up. Indeed check out our Youtube video where we put 100 wraps on a hook and still had no head buildup!

  • 12/0 50 denier thread
  • Breaking strain 1,900gm / 4.2lb
  • perfect on hook sizes 6 to 16
  • Lays perfectly flat with no build up, regardless of how many loops you put on the hook
  • 10 times stronger than steel of the same diameter

Pro Tips:
1 -
rotate anti-clockwise to untwist and lay perfectly flat. With just 2 or 3 light wraps of Nano Silk over foam you can then tighten and tie in foams or materials that would cut easily.
2 use white Nano Silk and simply color the last 4 inches (100mm) of thread for heads in a visible color

Not all GSP threads are the same as strength tests show. Nano 50D is available in black and white, with 100 metres on each spool or 50m for colored Nano 50D. We use the highest quality materials to ensure that there are no tangles and that it produces the smoothest and strongest GSP on the market in each size band. Search for Global Fly Fisher Thread Chart to see independent evidence!.

There are 100m / 109 yards (approx ) per spool of Nano Silk 50D 12/0 Black

Semperfli Nano Silk 50D 12/0 Black was last modified on 17/09/2021 14:32


Material Length100109 yds
Breaking Strain1.9kg4.2lb
Material TypeGel Spun Polyethylene (GSP)
Product PackagingSpool


Customer Reviews

One of the great ways of checking quality is to see reviews by other customers about Semperfli Nano Silk 50D 12/0 Black and other fly fishing products. To date we have 28 customer plus reviews and comments can be made by Facebook. Please leave your feedback and reviews to help other fly fishermen.

Since 2006 we have had thousands of reviews from tens of thousands of customers world-wide, check the latest reviews here. Let us know what you think about this.

Customer Reviews for Semperfli Nano Silk 50D 12/0 Black

Average Rating (28 Reviews):  
Write a Review and share your opinions!

Nano silk
Sunday, 8 November 2020  | 

Its certainly strong but not the easiest stuff to work with. Splits very easily and very slippery. Difficult to cut cleanly. Will persevere though cos the strength is a big advantage.


You might find using some wax helpful and adding some extra twists if it is untwisting too easily for yourself. Best option to cut it is with a razer blade or craft knife. It is deffinatly worth it so keep perservering.

Nano silk... the best thing to happen to fly tying
Monday, 29 June 2020  | 

I will only use nano silk. Its the best!

Super Strong
Thursday, 21 November 2019  | 

Amazingly strong thread but very difficult to cut if not under tension.

Nano Silk
Friday, 17 May 2019  | 

very thin thread and very very strong do not try and break this with bare hands the finest thread I have used the only thread to use on very small patterns with even finer Nano thread available for the very small patterns good range of colours this thread will suit the majority of tyers

Jolly Good
Friday, 2 March 2018  | 

Excellent service....very quick. I don`t actually do any fishing - I build models but this string is very useful!

Product Nano Silk
Monday, 4 December 2017  | 

I have been a fly tying for a few decades now and been using nano silk since I met Mick and the family at Burton on Trent fly festival. I like to see/ touch materials I buy especially feathers and capes, with nano silk it's manufactured consistently to a high standard.its takes a little while to adapt to the silks strength and thickness when you first offer it to the hook but once you mastered this well small flies just keep rolling of the vice. Also getting used to the amount of tension to apply because you can cut through some materials. All in all very good tying thread Tring to reduce stocks of other brand as a result.

Very pleased
Monday, 10 April 2017  | 

Pity they didn't have GSP forty years ago. Almost gave up tying due to being too heavy handed. I don't break this silk, but I'v bent a few hooks.

Strong Thread
Friday, 29 April 2016  | 

Good strong thread great for tying.

Black nano thread
Friday, 8 April 2016  | 

This thread is excellent !. Ultra strong, I can use less of it and still have secure tyings, it makes for a more durable fly. It gives me confidence in my tying, knowing it's unlikely to break which lets me be more creative !. Could this be the ultimate thread ?. Thank you.

Nano silk tying thread
Sunday, 6 September 2015  | 

Quite possibly the best thread I have ever used. Why would anyone use cheaper alternatives

Read all 28 customer reviews...

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