GP2403-08-08-04FP Tompkins JIC-to-JIC Gauge Port, -04 Female Pipe Port

Rather than selecting by family name alone, GP2403-08-08-04FP should be matched by its exact connection set: JIC-to-JIC, 08/08 nominal sizes, and a -04 female pipe port. At the gauge connection, Tompkins calls out 1/4-18 female pipe. That is the detail most likely to separate this part from another GP2403 model with the same 08/08 primary sizing.

This GP2403 layout is the fixed JIC-to-JIC option in the Tompkins gauge-port range. At nominal size 08 on both primary connections, this version occupies the mid-range of the family rather than either size extreme.

If the same 08/08 primary sizes are needed with the SAE O-ring gauge-port style, the corresponding alternate part is GP2403-08-08-04FB. For replacement selection, the safest match is the complete connection set—not just the series or overall appearance of the fitting.