Muttern

Natural Nylon Standard Hex Nut - Thread Size 4-40 - Distance Across Flats 6.4 mm (0.250 in) - Overall Height 2 ...

Lock nuts made of plastic

Flat nut with M14 thread

Lock nuts made of nickel plated brass

Nuts Hex Hex 6.35mm 2.39mm Nickel 4-36

Round Thumb Nut - Aluminum - 6-32 Thread.

Hex Nut, 2-56

Cable Accessories Lock Nut Divisible M32 Metric Thread

Nuts Hex M20 X 1.5

Nut 1/4-36 UNS-THD 8mm-A/F 1.93mm-THK Brass Nickel