GP6400-16-16-04FP Tompkins JIC-to-O-Ring Gauge Port, -04 Female Pipe Port

The defining feature of GP6400-16-16-04FP is its three-connection arrangement: nominal size 16, nominal size 16, and a -04 female pipe port. Unlike the JIC-to-JIC families, GP6400 combines JIC and O-ring connection styles on its primary path.

The matching 16/16 nominal sizing puts this model toward the larger half of the family. Because Tompkins offers parallel FP and alternate-port versions, the third connection deserves its own fit check. On GP6400-16-16-04FP, it is 1/4-18 female pipe.

If the same 16/16 primary sizes are needed with the SAE O-ring gauge-port style, the corresponding alternate part is GP6400-16-16-04FB. Match the 16/16 primary sizing first, then confirm the gauge-port thread shown in the specifications.