7440 / T20 / W21W

These 7440 'Single Filament' LED bulbs cross reference as compatible with these other part numbers:
7444NA, W21W, T20, 7440, 7444, 7441, 992, 992A, 7505, 7440A, 7440AL, 7440NA, 7440NA, 7440ST, 7440LL