Material ：Stainless Steel. The link shows that the inventory is all fake.
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Fine Thread M5 M6 M7 M8 M10 M12 M14 M16 Pitch 0.5~1.5mm 304 Stainless Steel Nylon Insert Lock Nut Hexagon Self-locking Locknut
Aliexpress UK
230PCS Insert Nuts Kit. Quantity：230PCS. M4 8 /30pcs. M4 10/60pcs. M10 15/3pcs. M10 25/2pcs. M5 10/45pcs. Type: Hex socket screw-in.
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Long Nuts M2/M3/M4/M5/M6/M8/M10 OD3.5~16mm Length 4mm-100mm Aluminum Round Threaded Sleeve Standoff Spacers Long Nuts Connector
Aliexpress UK
M3 ; thread pitch 0.5mm, spanner size 5.5mm. M4 ; thread pitch 0.7mm, spanner size 7mm. M5 ; thread pitch 0.8mm, spanner size 8mm. M6 ; thread pitch 1.0mm, spanner size 10mm. M8 ; thread pitch 1.25mm, spanner size 13mm.
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10PCS M5 M6 M8 M10 Plastic Hex Nut M12 M14 M16 Metric Thread Hexagon Black Nylon Nut M18-M63X1.5 Pitch 1.5mm/2mm
Aliexpress UK
A hexagonal nut with a metric thread - DIN 934 • Stainless Steel - A4 316 - Marine Grade • Standard metric thread - Most Common M3 x 0.5mm pitch, 5.5mm spanner M3.5 x 0.60mm pitch, 6mm spanner M4 x 0.7mm pitch, 7mm across flats M5 x 0.8mm pitch, 8mm across flats M6 x 1.0mm pitch, 10mm across flats M7 x 1.0mm pitch, 11mm across flats M8 x 1.25mm pitch, 13mm across flats M10 x 1.50mm pitch, 17mm across flats M12 x 1.75mm pitch, 19mm across flats.
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M2 M2.5 M3 M4 M5 M6 M8 M10 M12 Slotted Inside Outside Self Tapping Thread Insert Adapter Screw Nuts Sleeve Converter Nut
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Black Stainless Steel Knurled Thumb Nuts. Made From Black Stainless Steel. Price : 0.99. Height 18.0mm. Thread Pitch 1.25mm. Height 15.0mm.
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1~20Pcs Cylindrical Connect Nut M2 M2.5 M3 M4 M5 M6 M8 Connector Joint Sleeve Tubular Nuts 304 Stainless Steel Length 4~50mm
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Nyloc Nuts. Nyloc nuts with a nylon insert. These are the standard, most commonly used nyloc nuts. Grade 6 steel, bright zinc plated.
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M2 M2.5 M3 M4 M5 M6 M8 M10 Brass Heat Insert Nut Double Twill Knurle Molding Injection Embedment Thread Hot Melt Nuts 3d Printer
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Zinc plated Nyloc Flanged Nuts. The Nyloc nuts are a torque prevailing nut that uses a nylon insert to provide a locking feature. Zinc Plated DIN 6986, Grade 8. Nylon Insert. M5x0.7mm pitch, 8mm spanner size.
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2~7Pcs Anodized Colourful Aluminum Flange Nylon Lock Nuts Self-locking For RC FPV Racing Drone Locknut M2 M2.5 M3 M4 M5 M6 M8
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Flanged hexagon nuts with serrated face. The protruding flange increases the bearing surface of the nut allowing it to be used with irregular and oversized holes.
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10-50pcs M4 M5 M6 M8 M10 Zinc Alloy Thread For Wood Insert Nut Flanged Hex Drive Head Furniture Nuts Woodworking
Aliexpress UK