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TAPSHOP - for discount kitchen taps, bathroom taps & showers

 
Discount tap shop (faucets)
bathroom tap, kitchen tap, PO Box 384, Eastleigh,
shower mixer and kit: Southampton, SO50 4XN
BSP pipe thread data. Reference table. plumbing pipe sizes. enquiries@tapshop.net
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BSP (British Standard Pipe) Thread Data

BSP Nominal
Size
(inches)

Threads
Per
Inch
(TPI)

Thread Pitch
(inches)

Major
Diameter
(inches)

Major
Diameter
(approx in mm)

Minor
Diameter
(inches)

Tapping
Drill
Size

1/16 28 0.0357 0.304 7.7 0.2583 Letter
Drill G
(6.6 mm)
1/8 28 0.0357 0.383 9.7 0.3372 11/32 in.
(8.73 mm)
1/4 19 0.0526 0.518 13.2 0.4546 11.8 mm
(0.4646 in)
3/8 19 0.0526 0.656 16.7 0.5886 15.25 mm
(0.6004 in.)
1/2 14 0.0714 0.825 21 0.7336 3/4 in.
(19.05 mm)
5/8 14 0.0714 0.902 22.9 0.8186 21 mm
(0.8268 in.)
3/4 14 0.0714 1.041 26.5 0.9496 24.5 mm
(0.9646 in.)
7/8 14 0.0714 1.189 30.2 1.0976 1.1122 in.
1 11 0.0909 1.309 33.2 1.1926 30.75 mm
(1.2106 in.)

Printed courtesy of British Tool Company.

For any orders, comments, concerns, corrections, additions etc, please contact:
britool51 at hotmail.com
Last updated: 06/24/04

For further help with the identification of a pipe thread see Maryland Metrics.and Colder Products. help pages.

In the UK, basin and sink tap connecting threads are NORMALLY 1/2"BSP (approx 21.5mm OD).
Bath tap connecting threads are NORMALLY 3/4"BSP (approx 26.5mm OD).
HOWEVER, monobloc (one-hole) and some specialist taps will use various sizes of connecting tails and/or compression fittings.

The accepted UK standard domestic water feed pipe sizes are 15mm OD copper tube (for basin and sink taps, also mainswater feed to bath taps) and 22mm OD copper tube (for gravity-fed bath taps).

 
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