Nickel-plated carbon steel, can provide good corrosion resistance and abrasion resistance, while improving the appearance quality and hardness of the nut. They contain nylon rings that increase friction and prevent reverse rotation when the bolt is tightened.
eBay
Brass Heat Threaded Inserts Nut Tool Soldering Iron Tip M2 M3 M4 M5 M6 Insertion Embedded Copper Nuts for 3D Printing Component
Aliexpress UK
1 x Installation Tool (M1.6 0.35). 1 x Drill Bit (M1.6). Quantity: 50pcs. Because of a certain elasticity, thread insert can even the load distribution on each thread, eliminate pitch and tooth deviation between screw and screw hole, and absorb vibration, thus increasing the screw thread connection strength and fatigue resista.
eBay
520pcs M2 M2.5 M3 Metric Female Thread Knurled Brass Threaded Insert Embedded Nuts Assortment Kit,Double Pass Knurl Nuts Copper
Aliexpress UK
Fit the wire screw set in the screw hole of the workpiece of aluminum alloy and other materials can form a high‑strength, wear‑resistant, high‑accuracy standard female thread. Using high‑strength, high‑accuracy ‑shaped cross‑section steel wire.
eBay
Metric Rivet Nut Assortment Kit (55Pcs/150Pcs) - Aluminum M3 M4 M5 M6 M8 M10 Flat Head Rivnut Threaded Insert Nut Set
Aliexpress UK
304 Stainless Steel wire thread inserts. Stainless steel inserts are 50% stronger than the original thread.
eBay
Threaded Heat Insert Nut Tool M2 M3 M4 M5 M6 Brass Hot Melt Insertion Embedment Nut Soldering Iron for Plastic 3d Printing Tools
Aliexpress UK
Threaded insert, brass, M1,6, BN 37901, L: 2mm, MULTISERT®. Manufacturer part number: 073M1.6.
eBay
70/130 threaded inserts, nut combination tool sets for wooden furniture, zinc alloy furniture, bolt fastener connectors.
Aliexpress UK
Introduce:. Material: Brass. High quality brass, corrosion-resistant, wear-resistant and durable, in compliance with ROHS standards. Adopting advanced production technology, the cross-section is smooth and flat, without residual burrs, and it is not easy to slip during rotation.
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M3 M4 M5 M6 M8 M10 Hex Socket Drive Insert Nuts Threaded For Wood Furniture 304 Stiainless Steel (A2-70)
Aliexpress UK
Model: Injection Molding Knurled Thread Inserts Nuts. Material: Brass. Standard: GB.
eBay
Threaded Brass Heat Set Insert Nut 3d printing Machine Tool Soldering Iron Tip Plastic Copper Hot Melt Nut Heating Set Insertion
Aliexpress UK
M1.6 M2 M2.5 M3 M4 -M6 Helicoil Thread Repair Insert Coil A2 304 Stainless Steel.
eBay
10/20pcs M4 M5 M6 M8 M10 Zinc Plated Steel Hexagon Socket Threaded Insert Nut Embedded E-Nut for Furniture Wood Bed Cabinet
Aliexpress UK