Comparison : Item # 1/16-27 NPTF RING L1, 1/16 Inch (in) Size National and Aeronautical Taper Pipe Thread Ring Gage
Item # 1/16-27 NPTF RING L2, 1/16 Inch (in) Size National and Aeronautical Taper Pipe Thread Ring Gage
Item # 1/16-27 NPTF RING L1/L2, 1/16 Inch (in) Size National and Aeronautical Taper Pipe Thread Ring Gage
Item # 1/16-27 NPTF RING 6 STEP, 1/16 Inch (in) Size National and Aeronautical Taper Pipe Thread Ring Gage
Item # 1/8-27 NPTF RING L1, 1/8 Inch (in) Size National and Aeronautical Taper Pipe Thread Ring Gage