[10000 BULK] Lock Washers External Internal Steel Zinc #4

Lock Washers External Internal Steel Zinc #4 deliver reliable locking action for fastened assemblies subject to vibration and loosening. Made from durable steel and finished with a zinc coating, these washers resist corrosion while keeping your joints snug and secure.

Designed for both external and internal locking surfaces, the #4 size fits standard hardware and is ideal for automotive, machinery, electronics, and general fastening projects where a strong, tamper-resistant grip is essential.

Key Benefits

• Corrosion resistance: zinc-plated steel stands up to rust and wear in challenging environments.
• Effective anti-loosening: serrated locking surfaces grip the mating parts to resist vibration-based loosening.
• Versatile sizing: size #4 compatible with common bolts and screws.
• Easy to install: simple drop-in fit and secure with standard tightening.
• Wide applications: suitable for machinery, electronics, automotive, and furniture assemblies.

Specifications

• Material: Steel
• Finish: Zinc plating
• Type: External/Internal lock washer
• Size: #4

For best results, pair these washers with compatible fasteners and torque according to your project specifications to maintain secure, lasting assemblies.