R 1 thread dimensions
ISO 7-1 (BSPT) · Taper 1:16 · 55°
Dimensions
- Major diameter
- 33.249 mm1.3090 in
- Pitch
- 2.309 mm11 TPI
- Thread height
- 1.479 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.
Thread profile
Schematic: flank angle and pitch-to-depth proportions to scale.
Easily confused with
| Thread | Standard | Major diameter | Flank | Seals on |
|---|---|---|---|---|
| G 1 | ISO 228-1 (BSPP) | same diameter; same pitch | 55° | Gasket / O-ring |
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