Hubbell 60A Pin & Sleeve Receptacle 460R9V0 (often listed as HBL460R9W)
Hubbell 60 Amp Pin and Sleeve Receptacle, specifically identified by the part number 460R9VO (often listed as HBL460R9W or A460R9 for current versions). Protection: Watertight (IP67 or IP22 depending on the exact mounting/series) and impact-resistant.