All metal anti-loose nut Standard: GB6184 DIN985 hexagonal lock thin nut -SUS200 GB6177.1 hexagonal flange nut -SUS200 GB889.1 non-metallic inserts Hexagonal lock nut -SUS304 cassette nut - carbon steel nickel plated GB6183.1 Hex Flange Nylon Nut-A3 Zinc-plated GB6183 Non-metallic Insert Hexagonal Flange Nut 35 Steel Zinc-plated GB889.2 Non-metallic Insert Hexagonal Lock Nut -A3 Steel White Zinc-plated DIN985 Hexagonal Locking Latch Nut -8 grade color DIN985 non-metallic inserts hexagonal locking thin nut -8 black DIN985 hexagonal locking thin nut-SS316