Taperpipe NPTF Ring 6-Step NPTF 6 step ring gages check the crest truncation or profile of the external threads and are used in conjunction or relationship with the L1 ring

• NPT L1 rings inspect the functional size or hand tight engagement of the pipe, nipple or male threads
• NPTF L1 ring gages inspect the functional size or hand tight engagement of the pipe, nipple or male threads
• NPTF L2 ring inspects the wrench engagement threads of a coupling and taper of the external threads and to be used in conjunction or relationship with the NPTF L1
• NPTF 6 step ring gages check the crest truncation or profile of the external threads and are used in conjunction or relationship with the L1 ring
• NPT pipe thread plug and ring gages are manufactured per ANSI/ASME B1.20.1
• NPTF gages are manufactured per ANSI/ASME B1.20.5
• Free NIST certificate