Hydraulic Straight Fitting 3-Pack | SeaStar HF5528 3/8 in. tube to 1/4 in. NTP stainless steel fittings used in Seastar Solutions or Teleflex marine hydraulic steering systems. Seastar hydraulic connector fitting 3/8 in. tube to 1/4 in. male NPT Not for use with cylinder or helms ending in -3 suffix Stainless steel 3 fittings per kit