This is a brand-new socket that replaces the the Frymaster Star MFG 200409, 2E-200409, and 8071415 sockets. It is used in food service equipment manufactured by Frymaster Star in models such as: 

400-C Polished

524SB

524SBW

536SB

All Points 38-1108

CONTEMPO STYLE A

CONTEMPO STYLE F

D231

FW AND NW SERIES

F24

F24PS

F24W

F36

F36PS

F36W

WA-175

Each socket has a spring-loaded pin to mount the snap-in heating element, using the recessed ceramic cap at the end of the lamp. Each element requires two sockets.