GP6504-08-08-04FP Tompkins JIC Swivel Gauge Port, -04 Female Pipe Port

The quickest way to distinguish GP6504-08-08-04FP from neighboring GP6504 part numbers is the combination of 08/08 nominal sizes and the -04 female pipe port. The 08/08 pairing sits in the middle of the available nominal-size range, making the part number itself important when comparing adjacent sizes.

Think of the part as three checks: first nominal size 08, second nominal size 08, and finally the 1/4-18 female pipe gauge connection.

GP6504 is the swivel option in this group, using a male JIC connection opposite a female JIC swivel. If the same 08/08 primary sizes are needed with the SAE O-ring gauge-port style, the corresponding alternate part is GP6504-08-08-04FB.

For replacement selection, the safest match is the complete connection set—not just the series or overall appearance of the fitting.