A flat washer helps distribute fastening load across a compatible assembly surface, and this Jacuzzi Whirlpool Bath Type A version is designed for #10 hardware using the 4036000 reference. Washers are useful because they help protect the mounting surface while improving fastener seating and retention in assembled parts.This part has practical value because the correct washer size helps preserve the intended hardware stack-up and prevents the use of mismatched substitutes. A properly selected Jacuzzi Whirlpool Bath washer contributes to more dependable reassembly and a more secure finished installation.This type of part is especially useful when the original washer is missing, corroded, distorted, or should be replaced during service. That helps restore the proper hardware interface without broader component replacement.Installed in the proper application, this washer helps support better fastener performance and stronger long-term assembly integrity. #10 flat Type A washer from Jacuzzi Whirlpool Bath Helps distribute fastener load in compatible skimmer-related assemblies Useful when replacing a missing or damaged original washer Supports cleaner reassembly and more dependable retention Improves hardware fit and service accuracy