Hope you enjoy your shopping!!
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<br />Features:
<br />1.These lock nuts are made from 304 stainless steel for durability and great corrosion resistance for outside use.
<br />2.Nylon insert lock nuts have a undersized nylon washer that creates friction with the mating threads to prevent loosening.
<br />3.There are total 7 different sizes of lock nut that you can choose for different bolts and use them in various situation.
<br />4.They can prevent vibration from loosening a bolted joint, resist loosening under vibrations and torque to provide a locking action.
<br />5.These lock nuts are amazing replacement for normal nuts of hardware, vehicles, home or outside applications. 
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<br />Specifications:
<br />Material: 304 stainless steel
<br />Standard: A2-70
<br />Insert: Nylon
<br />Size & Quantity:
<br />165pcs:
<br />M3:45pcs,M4:35pcs,M5:30pcs,M6:25pcs,M8:15pcs,M10:10pcs,M12:5pcs,
<br />Box Size: 13.2 x 7.2 x 2.3cm / 5.19 x 2.83 x 0.9&amp;quot;
<br />480pcs:
<br />M2 X 20:20pcs,M2 X 16:20pcs,M2 X 12:20pcs,M2 X 8:20pcs,M2 Nuts:80pcs,M3 X 20:20pcs,M3 X 16:20pcs,M3 X 12 :20pcs,M3 X 8:20pcs,M3 Nuts:80pcs,M4 X 20:20pcs,M4 X 12:20pcs,M4 X 8:20pcs,M4 Nut:80pcs,
<br />Box Size: 13.2 x 7.2 x 2.3cm / 5.19 x 2.83 x 0.9"
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<br />Package Includes:
<br />1 set x Lock Nuts (165pcs )
<br />Or Screws & Nuts(480ocs)