Straight in line tap 1/8" BSP thread into tank, 1/4" BSP thread with 60 degree seat for solder type fittings. overall dimensions 45mm long inc threads x 19mm diameter. Tap supplied bare - order fittings as required separately.
can only have solder type nut and nipples fitted to the larger end.
note that the 1/8" BSP end with the hexagon has a seating flange, so can be screwed into a tank.