NPT (National Pipe Taper) Plug and Ring Gauges are precision inspection tools used to check the accuracy and fitment of tapered pipe threads as per ANSI/ASME B1.20.1 standards. These gauges are essential for ensuring leak-proof threaded connections in piping systems used for fluids, gases, and hydraulic applications.

Key Features:

• Manufactured as per ANSI/ASME B1.20.1 and API standards

• Available in GO and NO-GO configurations for accurate inspection

• Includes Taper Plug Gauges for internal threads and Ring Gauges for external threads

• Taper angle maintained precisely at 1 in 16 on the diameter

• Made from high-grade wear-resistant tool steel with heat treatment for long life

• Supplied with NABL traceable calibration certificate

Technical Specifications:

• Thread sizes: 1/16” NPT to 6” NPT

• Accuracy: ±0.002 mm

• Surface finish: Fine ground and lapped

• Hardness: 58–62 HRC

Applications:

• Ideal for oil & gas, plumbing, HVAC, hydraulic, and industrial piping systems

• Used by pipe fitting manufacturers, valve producers, and quality control laboratories

Benefits:Ensures tight, leak-proof thread connections, prevents fitting mismatches, enhances inspection efficiency, and supports compliance with international NPT thread standards.