Description - C.P. Brass Raw Water Washdown. Base diameter- 1-5/8". Depth - 3-3/16". Threads - 1/2" FIPT x 3/4". Fastener - #6 (2)WARNING: This product can expose you to chemicals including LEAD which is known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.