G 5/8 Thread Specs
Standard: ISO 228 / ISO 7 (BSP)
Technical parameters and design data for the G 5/8 pipe thread.
Established under standard ISO 228 / ISO 7, this thread uses a pitch of 0.07143 inches and has 14 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 5/8
Nominal Diameter
0.902 in(22.91 mm)
Major Diameter
0.902 in(22.91 mm)
TPI (Threads per Inch)
14
Pitch
0.07143 in
Pitch Diameter
0.8563 in(21.75 mm)
Minor Diameter
0.8105 in(20.59 mm)
Tap Drill size
20.4 mm
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Frequently Asked Questions
What is the tap drill size for G 5/8 pipe thread?
The recommended tap drill size for a G 5/8 pipe thread is 20.4 mm.
What is the major diameter of a G 5/8 pipe thread?
For a standard G 5/8 pipe thread, the major diameter at the pipe reference plane is 0.902 inches (approx. 22.91 mm).