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This is the correct 7/16 - 20 nut and narrow/thick washer for mounting the 1969-72 big block exhaust manifold shroud. Both are made from 18-8 stainless with black plating (recommend never-seize be used on the stud). (Had to source the correct dimension washer from Europe). $17 plus shipping.
Last edited by briane; Feb 14, 2026 at 06:19 AM.
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