Global Spiral TTC fittings for use with Aeroquip Hydraulic Hose: FC254, FC273, FC273B, FC606, FC606B, GH466 and GH506.  1E fittings for use on 4-wire construction and 1Z fittings for use on 6-wire construction. This connection is commonly used in fluid power systems.  Code 61 is referred to as the "standard" series.  The female (port) is an unthreaded hole with four bolt holes in a rectangular pattern around the port.  The male consists of a flanged head, grooved for an O-ring, and either a captive flange or split flange halves with bolt holes to match the port.  The seal takes place on the O-Ring, which is compressed between the flanged head and the flat surface surrounding the port. The threaded bolts hold the connection together. *SAE J518, JIS B 8363, ISO/DIS 6162 and DIN 20066 are interchangeable, except for bolt sizes.