Trustworthy Attwood Heavy-Duty All-Plastic Adjustable Battery Tray - 27 Series [9098-5]

Stainless Steel Standoff 1.25" Base 1/4" x 20 Thread .75" Tall - 6-Pack

Unlike the SOB standoffs which have a blind thread, the SOT series standoffs
have a thread which runs all the way through the barrel of the standoff.
This allows the standoff to be mounted from either side of the base. These
parts are manufactured in 316 stainless steel making them suitable for deck
applications. This standoff is inertial (friction) welded to the base
yielding a very strong part. The bases are all 1.25" in diameter. Use for
through deck mounting of hardware or anywhere you need a fixed female
thread.