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  2. uxcell Knurled Insert Nuts - 100Pcs M3 x 0.5mm Female Thread Brass Threaded Insert Embedment Nut for 3D Printer
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Uxcell a16041800ux0824 M3 x 3 mm Female Thread Brass Knurled Threaded Insert Embedment Nuts 100PCS (Pack of 100)

4.2 4.2 out of 5 stars 296 ratings
Currently unavailable.
We don't know when or if this item will be back in stock.
Material Brass
Fastener Type Knurled, Insert
Thread Size M 3
Exterior Finish Brass
Color Brass Tone

About this item

  • Thread Size: M3 / 0.12"; Product Name: Knurled Nut
  • Material: Brass; Weight: 14g
  • Package Content: 100(+/-2%) x Knurled Nuts; Main Color: Brass Tone
  • Pitch: 0.5mm; Outer Diameter: 4.1mm / 0.16"
  • Length: 3mm / 0.12"
› See more product details

Brand in this category on Amazon

ruthex
Threaded inserts for plastic and 3D printing parts
Shop ruthexShop now 
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ruthex Threaded Inserts M2 + M3 + M4 + M5 Assortment Box - 70 + 100 + 50 + 50 Pieces - Brass Heat Set Insert for Plastic Parts - Metric knurled Nuts - Insert by Heat into 3D Printing Components
ruthex Threaded Inserts M2 + M3 + M4 + M5 Assortment Box - 70 + 100 + 50 + 50 Pieces - Brass Heat Set Insert for Plastic Parts - Metric knurled Nuts - Insert by Heat into 3D Printing Components
4.8 out of 5 stars. 3,698
ruthex M4 Threaded Inserts - 50 Pieces RX-M4x8.1 Brass Heat Set Insert for Plastic Parts - Metric knurled Nuts - Insert by Heat into 3D Printing Components
ruthex M4 Threaded Inserts - 50 Pieces RX-M4x8.1 Brass Heat Set Insert for Plastic Parts - Metric knurled Nuts - Insert by Heat into 3D Printing Components
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ruthex 7x Soldering Tips/Heat-Set Insert Tips - for Thread Inserts M2 / M2.5 / M3 / M4 / M5 / M6 / M8 - #2-56 / #4-40 / #8-32/ #10-24 1/4" and Soldering Iron Adapter 900M / T18
ruthex 7x Soldering Tips/Heat-Set Insert Tips - for Thread Inserts M2 / M2.5 / M3 / M4 / M5 / M6 / M8 - #2-56 / #4-40 / #8-32/ #10-24 1/4" and Soldering Iron Adapter 900M / T18
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Product details

  • Package Dimensions ‏ : ‎ 5.75 x 3.86 x 0.28 inches; 8.81 Pounds
  • Item model number ‏ : ‎ a16041800ux0824
  • Date First Available ‏ : ‎ July 20, 2016
  • Manufacturer ‏ : ‎ Dragonmarts - BISS
  • ASIN ‏ : ‎ B01IYWTCWW
  • Customer Reviews:
    4.2 4.2 out of 5 stars 296 ratings

Product Description

Made of bass material. Featured with heat resistance. Used on injection moulding for tightly fixing. No need to counter bore or countersink the boss hole because the insert has guide pilot.

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Customer reviews

4.2 out of 5 stars
296 global ratings

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Customers say

Customers find the nuts useful for 3D printing and consider them a good value. However, some have reported issues with bent or broken nuts, low strength, and difficulty inserting them. There are mixed opinions on the thread quality.

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Print qualityValue for moneyThread qualityQuality
7 customers mention "Print quality"7 positive0 negative

Customers like the print quality. They say it works well for 3D printing and they haven't had any issues with threads getting stuck.

"Works great for 3D printed parts. I design my holes 3.5mm. I use a long M3 screw to insert it...." Read more

"Work great for 3D printing, my only complaint is how small they are but, I guess you get what you pay for." Read more

"Works as expected." Read more

"these work well and i havent had any "screwed up" (hehe) threads" Read more

5 customers mention "Value for money"5 positive0 negative

Customers appreciate the nuts' value for money.

"On the surface, these seem like a great price...." Read more

"...On a positive note, the price was low enough that only 40-50 usable inserts are still acceptable, even if not worthy of a high rating." Read more

"Good value" Read more

"Great Value for the Cost..." Read more

9 customers mention "Thread quality"6 positive3 negative

Customers have different views on the thread quality. Some find it good and easy to install with a soldering iron. Others mention issues like poorly machined threads, inconsistent threads, or crushed nuts.

"Added to a PETG print. Used 32 so far, and all 32 threaded nicely and looked good...." Read more

"...They work but are no the bet, some have inconsistent threads or were crushed but that's a very small amount of the ones I received,...." Read more

"These have good threading and melt in easily with a soldering iron and keep a good hold" Read more

"...of the insert was a little thinner than I'm used too but the threads are working well." Read more

10 customers mention "Quality"2 positive8 negative

Customers are unhappy with the nuts' quality. They report that the nuts are bent, broken, or poorly machined. The nuts have low strength, deform into ovals, crack on one side, and have inconsistent threads. Some customers also mention that the nuts are crushed or oval-shaped.

"...They work but are no the bet, some have inconsistent threads or were crushed but that's a very small amount of the ones I received,...." Read more

"...A couple of them were broken, too." Read more

"So many oval and misshapen parts...." Read more

"Great product! I use these with 3D printed parts to add strong threads. They are awesome...." Read more

Top reviews from the United States

  • Dan Hoium
    5.0 out of 5 stars So far they’ve all been good
    Reviewed in the United States on October 15, 2021
    Verified Purchase
    Added to a PETG print. Used 32 so far, and all 32 threaded nicely and looked good. I screwed the first one up a little, didn’t realize they heated up so quickly, but it’s still good.

    Not sure why everyone is complaining about threads being wrong and having to tap them. I suspect it’s the method they installed them.

    I used a M3 screw that was 30mm long to install them. Screw it on to the tip of the screw, heat it, push it into the plastic and hold it there til it cools down, then just unscrew your screw and do the next one.
    Helpful
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  • FancyChancie
    5.0 out of 5 stars Works great for 3D printed parts!
    Reviewed in the United States on July 1, 2019
    Verified Purchase
    Works great for 3D printed parts. I design my holes 3.5mm. I use a long M3 screw to insert it. I heat insert with torch only until the shiny bronze becomes a little more dull then insert into part. Wait for it to cool while making sure it is oriented properly, then you’re done.
    5 people found this helpful
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  • Nate Schmitz
    4.0 out of 5 stars Great Value for the Cost
    Reviewed in the United States on July 22, 2021
    Verified Purchase
    You get what you pay for and I knew that when purchasing these inserts. They work but are no the bet, some have inconsistent threads or were crushed but that's a very small amount of the ones I received,. They have decent holding strength in PLA+.
    Helpful
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  • Amazon Customer
    3.0 out of 5 stars Several are bent or broken
    Reviewed in the United States on June 30, 2022
    Verified Purchase
    On the surface, these seem like a great price. Unfortunately, about half of the ones I tried to use were bent and wouldn't let a screw thread all the way through. A couple of them were broken, too.
    Helpful
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  • Matthew Findley
    5.0 out of 5 stars Would Recommend…
    Reviewed in the United States on August 17, 2021
    Verified Purchase
    And purchase again if I needed them. Just because of over tightening if you’re 3D printing as they will pull out.
    Helpful
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  • Michael Mallory
    5.0 out of 5 stars Must for 3D Printing
    Reviewed in the United States on September 28, 2020
    Verified Purchase
    These have good threading and melt in easily with a soldering iron and keep a good hold
    Helpful
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  • Charles Carey
    5.0 out of 5 stars Very happy.
    Reviewed in the United States on October 18, 2019
    Verified Purchase
    The body of the insert was a little thinner than I'm used too but the threads are working well.
    Helpful
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  • Crazy Joe
    2.0 out of 5 stars Poor quality
    Reviewed in the United States on February 8, 2022
    Verified Purchase
    So many oval and misshapen parts. I thought I was somehow using to high a temp when inserting them and causing them to deform, but after testing several straight out of the bag I found they just came this way. I have to add a screw before I use them to make sure they will actually work when inserted and not ruin a part. Spend some more $ to get ones that work consistently.
    Helpful
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Top reviews from other countries

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  • Jestebankof
    5.0 out of 5 stars Excelentes!
    Reviewed in Mexico on June 22, 2022
    Verified Purchase
    Estos insertos son justo lo que buscaba para reparar carcazas de laptop cuando ya vienen con insertos faltantes, visagras rotas y similares. Los adquiri junto con un pack de tornillos a medida para reponer si hacen falta y dar una segunda oportunidad a equipos con daños en carcaza y visagras.
    Report
  • Shaun
    1.0 out of 5 stars Useless
    Reviewed in the United Kingdom on October 2, 2022
    Verified Purchase
    Crap.
    Report
  • User
    5.0 out of 5 stars I love it!
    Reviewed in Canada on December 6, 2018
    Verified Purchase
    If you're in the market for a tv antenna, this is the one for you. It works great and since you can rotate it you can tune in the channels perfectly. It comes with a mount so you can mount it on the wall of your house similar to a satellite dish mount. Just run the cable to the little box provided with the antenna and run another cable to your tv and Voila! Keep in mind that depending on your location you might not get the same results as I do but nonetheless, you cant go wrong for the price. If it doesn't work for you just sent it back for a refund.
    Report
  • Emilio Lozano
    4.0 out of 5 stars Funcionan muy bien, aunque pueden mejorar
    Reviewed in Mexico on December 25, 2021
    Verified Purchase
    Llegaron en perfecto estado y sin contratiempos, he usado algunas de ellas y no he tenido problemas, funcionan perfectamente, pero, lo que noté es que algunas no están muy bien hechas, las usaré como última opción, porque la parte "moleteada" que hace que se adhieran a la impresión, es muy delgada, no son muchas (5 máx) pero, sí podrían mejorar un poco la calidad.
    Customer image
    Emilio Lozano
    4.0 out of 5 stars Funcionan muy bien, aunque pueden mejorar
    Reviewed in Mexico on December 25, 2021
    Llegaron en perfecto estado y sin contratiempos, he usado algunas de ellas y no he tenido problemas, funcionan perfectamente, pero, lo que noté es que algunas no están muy bien hechas, las usaré como última opción, porque la parte "moleteada" que hace que se adhieran a la impresión, es muy delgada, no son muchas (5 máx) pero, sí podrían mejorar un poco la calidad.
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  • Amazon Customer
    4.0 out of 5 stars Exactly what I needed
    Reviewed in Canada on March 1, 2021
    Verified Purchase
    I used these in a few of my 3D prints with no issues. A little overpriced but my local store had none this size in stock.
    Report