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ruthex #4-40 Short Threaded Inserts - 100 Pieces RX-4-40x3.56 Brass Heat Set Insert for Plastic Parts - Inches knurled Nuts - Insert by Heat into 3D Printing Components
✅ In stock
F
Grade
Analysis Confidence
100%
⚠️ Price may have changed. Last updated 24+ hours ago — confirm on Amazon.
Check Deal at Amazon
Price verified Sep 19, 2026 12:49 AM · Prices & availability subject to change
Is This a Good Price on Amazon?
💤 Not a Deal- 💤Verdict: Not a Deal. Price is at or above historical norms. Best to wait for a sale.
- 💰The current price is slightly above the going rate for this product — worth watching for a drop.
- 🏷️The retail sticker price has been slashed by 41% — a steep markdown from the official listing.
- 📉Going back roughly eight months, a more competitive price has not appeared — this stands out as a strong value by recent standards.
- ➡️Pricing has held fairly steady, with no strong push in either direction.
How We Scored This Deal
Price Competitiveness
0/28
Recent Value
0/22
Market Standing
0.4/20
Deal Strength
13/20
Momentum
4/10
📝 Product Overview
🏪 Sold by
ruthex
📦 Fulfillment
Fulfilled by Amazon
🚚 Shipping
Free Shipping
Product Details
✓#4-40 SHORT THREADED INSERTS FOR 3D PRINTING: Our heat set inserts can be easily embedded in 3D printed parts using heat from a soldering iron, fitting perfectly in a blind or through holes.
✓STRONG HOLD WITH KNURLED DESIGN: Featuring an opposing spiral knurl pattern, these nut inserts offer high pull-out resistance and secure fastening, ensuring a strong internal thread in your 3D prints.
✓STABLE AND LONG-LASTING INSERTS: Made from durable brass, these brass inserts provide excellent corrosion resistance and thermal conductivity. They offer long-lasting performance & are even reusable.
✓SUITABLE FOR A VARIETY OF PLASTICS: Compatible with all kinds of thermoplastics like PLA, PETG, ABS, PPS, PP and more. Once embedded, the insert nuts knurled design offers superior grip in the plastic.
✓CONVENIENT THREAD INSERT SET: Includes a set of #4-40 threaded inserts, providing a versatile solution for your 3D printing projects. Perfect for creating strong, reliable threads in 3D-printed part.
⚙️ Specifications
Material
Brass
Fastener Type
Knurled
Thread Size
#4-40
Exterior Finish
Brass
Color
UNC Threaded Insert
Metal Type
Brass
Finish Type
Unfinished
Brand
ruthex
Thread Type
Unified National Coarse (Unc)
Inside Thread Size
#4
Thread Style
Right Hand
