G connections have a straight body (constant diameter) with parallel (straight) threads. The main purpose of the parallel threads is to contain the pressure, which allows for regular installations and removals without damaging the thread. A sealing washer is required to seal the connection.
Table of Contents
What is G1 4 thread size?
| British Pipe Thread ( Whitworth Form) — Parallel (BSPP/BSPF) | ||
|---|---|---|
| Thread Designation | Nominal Size | Major Diameter mm d=D |
| G1/8 | 1/8″ | 9.728 |
| G1/4 | 1/4″ | 13.157 |
| G3/8 | 3/8″ | 16.662 |
What is G type thread?
G connections have a straight body (constant diameter) with parallel (straight) threads. The main purpose of the parallel threads is to contain the pressure, which allows for regular installations and removals without damaging the thread. A sealing washer is required to seal the connection.
Is G thread compatible with NPT?
The G (BSP / BSPP) standard is used in Europe and around the world. Although the threads look incredibly similar, they are not compatible. The NPT (US Standard) thread is tapered with a 60 deg thread pitch and designed to seal when the threads compress together, with pipe tape to fill in any minor leak paths.
Is G thread the same as BSPP?
BSPP = British Standard Pipe Parallel, cylindrical pipe thread with 55°apex angle. British parallel threads are often referred to as “G” threads, the two types of thread are the same parallel straight, the threads are measured in threads per inch. Therefore, BSPP is the same as G.
What is the difference between G1 4 and 1/4 NPT?
Yes there is a difference and they are not compatible with each other: 1/4G normally written as G1/4 or 1/4BSP(P) is a parallel thread typically used in Europe. 1/4 NPT is a tapered thread typically used in USA.
What is G1 thread size?
Whitworth Parallel Pipe Thread DIN ISO 228 (DIN 259) BSPP (British Standard Pipe Parallel)
| Nominal Diameter | Major Diameter Inch | Pitch mm |
|---|---|---|
| G 1″ | 1.309 | 2.309 |
| G 1 1/8″ | 1.492 | 2.309 |
| G 1 1/4″ | 1.650 | 2.309 |
| G 1 3/8″ | 1.745 | 2.309 |
What size is G1 thread?
Whitworth Parallel Pipe Thread DIN ISO 228 (DIN 259) BSPP (British Standard Pipe Parallel)
| Nominal Diameter | Major Diameter Inch | Tapping Drill Size mm |
|---|---|---|
| G 7/8″ | 1.189 | 27.877 |
| G 1″ | 1.309 | 30.292 |
| G 1 1/8″ | 1.492 | 34.939 |
| G 1 1/4″ | 1.650 | 38.953 |
What size is g1 thread?
Is G thread a BSP?
BSP distinguishes between two types of threads. These are parallel threads (BSPP), which have a constant diameter, which are known a G threads, and taper threads (BSPT), whose diameter increases or decreases along the length of the thread, known as R threads.
What is G thread size?
BSPT (R/Rp)
| Male thread size (inch) | Female thread size (inch) | Minor diameter (mm) |
|---|---|---|
| R 1/2 | Rp 1/2 | 18,489 |
| R 3/4 | Rp 3/4 | 23,975 |
| R 1 | Rp 1 | 30,111 |
| G 2 | Rp 2 | 56,476 |