OJIYAS PARALLEL PIPE THREADS RING GAUGE

G ISO-based JIS

Ojiyas Parallel Pipe Threads (G) specified in JIS are used to connect fluid equipments, plumbing parts, pipes where density resistance is unnecessary in their mechanical connection. Limit gauges for parallel pipe threads (G) are used for inspecting the dimension of such threads.

Notes:

• There is no grade in the plug gauges for female screw threads
• The grade of class A and class B are for ring gauges of male screw threads
• Class A and class B are common for GO sides of gauges (GR) only

PF Conventional JIS

Ojiyas Parallel Pipe Threads (PF) specified in JIS are used to connect fluid equipments, plumbing parts, pipes where density resistance is unnecessary in their mechanical connection. Limit gauges for parallel pipe thread (PF) are used for inspecting the dimension of such the threads.

Notes:

The screw threads have two classes of class A and class B. There are gauges for inspection and production use. However, class A and class B are common for GO sides (plug/ring) of gauges only.

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