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QSJ 200Pcs Threaded Insert Bolt Assortment kit 100Pcs M3 M4 Brass Heat Set Insert, 100Pcs M3 M4 Stainless Steel Black Bolt for Industrial 3D Printing Projects
✅ In stock
F
Grade
⚠️ Price may have changed. Last updated 24+ hours ago — confirm on Amazon.
Check Deal at Amazon
Price verified Oct 3, 2026 12:04 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.
- ➡️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
0/20
Deal Strength
0/20
Momentum
0/10
📝 Product Overview
🏪 Sold by
Tenyoo-US
📦 Fulfillment
Fulfilled by Amazon
🚚 Shipping
Free Shipping
Product Details
✓【Complete Kit for Secure Fastening】 Includes 80 M3 x L4 x D5 inserts, 20 M4 x 8.1 x 6.3 inserts. black bolts: M3 x L5 (80pcs), M4 x 10 (20pcs). M3 M4 soldering iron tip.
✓【Durable Materials】 Brass threaded insert offer excellent wear resistance, and 304 stainless steel bolts ensure strong corrosion resistance and long-lasting performance.
✓【Simple and Efficient Installation】 First install the heat-set nut by heating it with a heated soldering iron until the plastic part melts slightly, letting the nut settle into the pre-drilled hole.As it cools, insert the black bolt and screw it into the nut.
✓【M3 & M4 Sizes】 The set includes widely-used M3 and M4 heat-set inserts and bolts, perfect for a variety of 3D printing, DIY projects.The 4-grid storage box keeps your threaded inserts and bolts neatly organized, making it easy to manage inventory.
✓【Perfect for 3D Prints】 Great for reinforcing joints in 3D printed enclosures, models, and accessories — widely used in prototyping, hobby builds, and more.
⚙️ Specifications
Material
Brass
Fastener Type
Insert
Thread Size
M3, M4
Exterior Finish
Brass
Color
Silver
Thread Type
Unified National Coarse (Unc)
Inside Thread Size
M3, M4
Thread Style
Right Hand
Thread Coverage
Fully Threaded
Thread Class
Class 2B
Maximum Shear Strength
1200 Lbf
