The threads appear to have had something threaded into them. May have been a demo model. Please be certain this is the pump you need for your application. Please message with any questions. The item "Dayton 5PXF1A In-Ground Pool Spa Pump 3-Phase LOCAL PICKUP NORTH OF DENVER, CO" is in sale since Monday, August 13, 2018.This item is in the category "Home & Garden\Yard, Garden & Outdoor Living\Pools & Spas\Pool Equipment & Parts\Pool Pumps". The seller is "serendipitysurplus" and is located in Berthoud, Colorado. This item can be shipped to United States.