Robert, They are known as SEAT, w/cap (3652318 cast on cap), GM# 3652182 and were used on 1940-54 Passenger cars and 1948-54 Chevy 1/2ton trucks. Not currently being reproduced, but there are a couple of vendors that offer "revulcanizing" to restore them to as new condition.

Steele Rubber Products revulcanizing

The Filling Station revulcanizing

Alternatively, Chev's of the 40's offers a replacement bushing that I believe is used to repair the old housing. You have to remove all the rubber and center steel tube to install them from what I know.

Others should be along to try and offer further help or suggestions. smile

Last edited by Gdads51; 03/19/2025 4:13 PM. Reason: spelling

~ Dan
1951 Chevy 3 window 3100
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