The GRACO 555630 is a 5/16 inch external tooth lock washer, typically used as a fastening component in GRACO equipment to prevent loosening of bolts or nuts due to vibration. Its material is not explicitly stated in available sources, but external tooth lock washers are commonly made from hardened steel or stainless steel for durability and corrosion resistance. Its intended use is to secure connections within GRACO machinery, ensuring reliable operation.

Key Features:

• External tooth lock washer
• 5/16 inch
• Designed for use with GRACO equipment requiring a 5/16 inch lock washer
• Prevents loosening due to vibration
• Simple installation
• Durable construction for repeated use

Applications:
Used in various GRACO equipment assemblies where secure fastening is required to prevent bolt or nut loosening under vibration or dynamic loads.

Installation Notes:

• Using genuine GRACO parts ensures proper fit, function, and reliability within GRACO equipment, reducing the risk of equipment failure or downtime.
• Ensure the washer is placed between the nut/bolt head and the mating surface
• Tighten to manufacturer-recommended torque specifications
• Inspect for wear or damage before reuse
• Replace washers if they show signs of wear or deformation
• Use only GRACO-approved parts for critical assemblies