16" x 16" Perforated Curved Blade Surface Mount Diffuser w/ Modular Core - Shoemaker 500MA-16X16

Hi! Thank you for your interest in the American Standard 051381-0020A Handle Base. Yes, this is the correct replacement part that you're looking for. The 051381-0020A is designed for use with the American Standard Williamsburg (1042) which you currently have. If interested, we also carry the 909410 0020A handle ball and the 051379-0020A under base escutcheon. To purchase any of these American Standard products, just follow the link provided and click on the Add to Cart button to have the item shipped right to your door! Thank you for visiting PlumbersStock. Have a great day!

Hi there! Thank you for your query about the American Standard Williamsburg 051381-0020A handle base. No, this handle base does not include the plastic insert that fits over the valve cartridge. It is only the decorative metal base, and the plastic insert (which the handle fits over) must be purchased separately or comes as part of the complete handle or cartridge assembly. If you wish to purchase this handle base, click "Add to Cart", fill out the required fields and we'll handle the rest. Thank you for visiting PlumbersStock. Have a good day!