There are a variety of sizes available but they are not all listed.
eBay
[High quality material]The reducer nut uses high quality stainless steel, high hardness, strength and not easy to straighten, to the reliability and stability of thread inserts. The thread insert is an effective tool for thread repair, including 20 thread inserts.
eBay
Clamping Screw Knob Is Safe, Non-toxic, Corrosion-resistant, High Hardness, Not Easy to Deform. Thread Length:15mm/20mm/25mm/30mm/35mm/40mm/50mm/60mm/65mm/70mm Head Dia:25mm/32mm/40mm/50mm. - Gripandles Screw Knobs Design, Easy to Install, Smooth Surface, Comfortable to Hold.
eBay
10 M6 zinc plated steel clip. Material: zinc plated steel. Distance from clip for edge to centre of 6mm hole: 11mm. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness.
eBay
Nut Style Round Base Weld Nut. Fastener Thread Direction Right Hand. Item Weld Nut. Basic Material Steel.
eBay
The flange may be serrated to provide a locking action. Thread Size: M6;. A flange nut is a nut that has a wide flange at one end that acts as an integrated, non- washer. Hex Size: 9.6mm. Material: 304 Stainless Steel;.
eBay
Specifications: Condition:100% Brand New Material: Stainless Steel Color: Silver Contents: In Total Quantity 125 Pcs Flange Nuts Assortment Kit 30 Pc – M3 30 Pc – M4 20 Pc – M5 20 Pc – M6 10 Pc – M8 10 Pc – M10 5 Pc – M12 Feature: Quality Material: Made of 304 stainless steel, good chemical resistance, high quality, can use for a long time. The surface of our flange nuts is smooth and burr-free after treatment. .
eBay
300pcs Threaded Insert M2 M2.5 for M3 M5 M6 Insert Nut Brass Threaded Bushings Internal Thread Knurled Nuts with Plastic Box for Plastic Parts by Heat or for 3D Printer Parts. Knurled nuts are designed for thermoplastics.
eBay