SKU: 14604203010

SemperFli Nano Silk Ultra 30D 18/0 Bulk Spool 500m

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Ships within 48 hours · Estimated delivery Sep 28 - Oct 3

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Description

SemperFli Nano Silk Ultra 30D 18/0 Bulk Spool 500mNano Silk Ultra 30D 18 0 Bulk Spool 500m Nano Silk Ultra 30D 18 0 Bulk Spool 500m is regarded as the tying thread of choice of professional fly tiers 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 Ultra 30D 18 Bulk Spool 500m is ideal for your smaller flies and the 30d, also known as 18

Nano Silk Ultra 30D 18/0 Bulk Spool 500m

Nano Silk Ultra 30D 18/0 Bulk Spool 500m is regarded as the tying thread of choice of professional fly tiers 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 Ultra 30D 18/ Bulk Spool 500m is ideal for your smaller flies and the 30d, also known as 18/0, having the widest 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.

Nano Silk Ultra 30D 18/0 Bulk Spool 500m is considered the professional level being the finest of the range. 30d is also known as 18/0 – that is really very small fly tying thread. Nano Silk Ultra 30D 18/0 Bulk Spool 500m has all the strength you would expect from this premier thread. It is 10 times stronger than steel of the same diameter! Nano Silk Ultra 30D 18/0 Bulk Spool 500m is fine enough for size 16 to 32 flies whilst still retaining its strength. Although Nano Silk Ultra 30D 18/0 Bulk Spool 500m is a fine thread it can be split down further if required so dubbing making dubbing much easier!

Nano Silk Ultra 30D 18/0 Bulk Spool 500m is designed for micro flies down to size 32, however do not be fooled, Nano Silk Ultra 30D 18/0 Black Bulk Spool 500m is stronger than 8/0 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!

  • 18/0 30 denier thread
  • Breaking strain 1,140g / 2.51lb
  • perfect on hook sizes 16 to 32
  • 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 30D is available in black and white, with 100 meters on each spool or 50m for colored Nano 30D. 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!.

Note: with all GSP threads including Nano Silk Ultra 30D 18/0 Bulk Spool 500m you should always use a ceramic bobbin holder.

There are 500m / 546 yards (approx ) per bulk pack of Nano Silk Ultra 30D 18/0 Bulk Spool 500m

Coming in a bulk bulk pack this is perfect for volume or commercial tiers.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
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  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
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SKU: 14604203010

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4.2 ★★★★★
Based on 29 reviews
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LC
Draper, US
★★★★★ 5
LOVE THEM!!
Size: Small, Color: (001) Black / Black / Castlerock
LOVE! These socks are so comfortable! I wear a 5 in women's and a 3 in big kid shoes. The small fit me perfectly. I see where some say they run small but I can't say that was an issue for me. They are "snug" but thats what you want with a no show sock. I feel they have support vs the ones i used to buy at Walmart. They are very soft! I am actually buying more today and throwing my other ones in the trash!
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Reviewed in the United States on February 18, 2026
L
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Lucy Mejia
Omaha, US
★★★★★ 5
So will not write down your foot
Size: Medium, Color: (001) Black / Black / Castlerock
I love these socks. They have a little bit of gel on the top of the heel for support in your tennis shoes and so your socks don’t write down. Very good quality.
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Reviewed in the United States on May 6, 2026
T
Verified Purchase
Twins9
Draper, US
★★★★★ 5
Comfy and Stay Put
Size: Medium, Color: (002) Black / Black / Halo Gray
These socks are honestly great. They’re super thin and light, so once you have them on, you kind of forget they’re even there. No bulky feeling in your shoes at all. The best part is they actually stay on. I hate no-show socks that slide down after five minutes, and these don’t do that. The little grip on the heel really works, so you’re not constantly adjusting them all day. They’re breathable too, which is nice if your feet run warm. They dry fast and don’t get that gross sweaty feeling. And there’s no annoying seam on the toe, so nothing rubs or feels uncomfortable. Basically, they’re just comfy, stay put, and don’t cause problems — which is all I want from socks.
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Reviewed in the United States on January 16, 2026
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Verified Purchase
swwkennyg
Massapequa, US
★★★★★ 5
Perfect sucks
Size: Medium, Color: (001) Black / Black / Castlerock
Wonderful socks . The weight is perfect !! These do not slip when in a shoe they stay out !!
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Reviewed in the United States on April 14, 2026
M
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Monica Alzate
Louisville, US
★★★★★ 4
Amazing but quality changed
Size: Large, Color: (002) Black / Black / Halo Gray
Love these socks so much, been buying them for about 4 years now!! Not giving them 5 stars anymore because the quality is different and not as good, durable and thick as before.
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Reviewed in the United States on July 10, 2025

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