Boxonly Hex Lock Nuts for Automobile Construction Machinery Shipbuilding Nylon Insert Lock Nuts Carbon Steel Black Zinc Plated Anti-Loose Locknuts M3 x 0.5mm 50pcs

• Feature: With a nylon insert, these lock nuts greatly reduce loosening under vibrations and torque.
• Size: Width Measured From Flat to Flat 5.5mm / 0.22inch, Height 4mm / 0.16inch.
• Material: Made of high quality carbon steel, surface is Zinc-plated for good rust resistance.
• Wide Applications: Perfect for household and machenical appliance. Screwing for nuts and bolts, Home Repairing, Threaded rod and Threadlock, Machine Tools, Furniture Bolts, DIY, Craft Product, Equipment, suit for bolt lock Ourdoor Projects. Good choice for stainless steel bolts and nuts job in greenhouse.
• Advantage: Our hex lock nuts are strong and durable to use. Surface galvanizing has a corrosion-resistant effect. Can be widely used in automobile, construction machinery, shipbuilding and etc.

Specification: Material: Carbon Steel + Nylon Finish: Black zinc plated Thread Size: M3 Pitch: 0.5mm Hex Width: 5.5mm / 0.22inch Height: 4mm / 0.16inch 1. Nylon-insert lock nut, polymer-insert lock nut, or elastic stop nut, is a kind of locknut. 2. It is a nut with a nylon collar insert that resists turning. 3. The nyloc nut can prevent vibration from loosening a bolted joint, which is easy to use. 4. The plastic insert is placed at the end of the nut, and its inner diameter (ID) is slightly smaller than the major diameter of the screw. 5. The insert deforms elastically over the threads of the screw, but threads are not cut into the nylon. 6. These lock nuts areideal replacement for normal nuts of hardware, vehicles, home or outside applications. Attention: This Nut is small part, please do not let children play, to prevent inadvertent swallowed.