R 3/4 thread dimensions

Major diameter

26.441 mm1.0410 in

Pitch

1.814 mm14 TPI

Thread height

1.162 mmbasic profile, before tolerances

Standard

ISO 7-1 (BSPT)

Form

Taper 1:16

Flank angle

55°

Seals on

Thread + sealant

Used for

Process connections

For taper threads the diameter is the nominal pipe outside diameter used for identification; the thread diameter changes along the length at a taper of 1:16.

Check a measurement against this thread

Schematic: flank angle and pitch-to-depth proportions to scale.