G R Rp Whitworth Thread BSPP BSPT

Overview

Engineering reference data for G R Rp Whitworth Thread BSPP BSPT in miscellaneous.

Key Formulas

Unit Conversion

$y = x \cdot k$

Multiply by conversion factor.

Linear Interpolation

$y = y_1 + \frac{(x - x_1)(y_2 - y_1)}{x_2 - x_1}$

Estimate between two known points.

Percentage

$p = \frac{\text{part}}{\text{whole}} \times 100\%$

Part as fraction of whole.

Variables

Symbol	Description	Unit
$x$	Input value	—
$y$	Output value	—
$k$	Conversion factor	—

Thread Specifications

The Whitworth thread profile defines these key geometric properties where p represents the pitch:

• Thread angle: 55°
• Thread depth: $0.640327p$
• Root radius: $0.137329p$

BSPP (G) Thread Dimensions

BSPT (R/Rp) Thread Dimensions

Sealing Mechanisms

BSPT connections seal through thread engagement. The male BSPT (R) thread seals directly against the female BSPT (Rp) thread.

BSPP connections require a different sealing method. BSPT (R) or BSPP (G) male threads with a conical 30° seat seal against a matching conical 30° seat on a BSPP female swivel fitting.

Interactive Charts

References

• Original Source