G 1-1/2 Thread Specs
Standard: ISO 228 / ISO 7 (BSP)
Technical parameters and design data for the G 1-1/2 pipe thread.
Established under standard ISO 228 / ISO 7, this thread uses a pitch of 0.09091 inches and has 11 threads per inch.
Often used in fluid, hydraulic, or pneumatic systems, NPT/BSP threads require suitable thread sealants to assure leak-tight performance.
Dimensional Specifications
Size Designation
G 1-1/2
Nominal Diameter
1.882 in(47.8 mm)
Major Diameter
1.882 in(47.8 mm)
TPI (Threads per Inch)
11
Pitch
0.09091 in
Pitch Diameter
1.8238 in(46.32 mm)
Minor Diameter
1.7656 in(44.85 mm)
Tap Drill size
45.1 mm
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Frequently Asked Questions
What is the tap drill size for G 1-1/2 pipe thread?
The recommended tap drill size for a G 1-1/2 pipe thread is 45.1 mm.
What is the major diameter of a G 1-1/2 pipe thread?
For a standard G 1-1/2 pipe thread, the major diameter at the pipe reference plane is 1.882 inches (approx. 47.8 mm).