Koolance BKT-PCI-G Computer L-Bracket with G 1/4 BSPP Threads Dual panel-mounted socket threads for "internal/external" fittings on a computer chassis L-bracket. This also allows tubing sizes which are too large to fit through the chassis slot. Nickel-plated brass fittings with G 1/4 BSPP threads. This product may need to be temporarily disassembled during installation.