Groco Backing Block, Part No. BB-4

$268.00

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Each size fits multiple seacock sizes. Press threaded brass inserts into the hull side of the backing block into the holes that match the seacock flange. Rigid 1/2″ thickness provides secure installation but is flexible enough to conform to minor hull curvature. Will not swell or absorb moisture.

Fits Seacock Sizes Dia.  Insert Threads
3000 9.5 3/8″-16
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Groco Backing Block, Part No. BB-4