BSPP & BSPT Thread Identification Table

BSP – BRITISH STANDARD PIPE
BSPT – BRITISH STANDARD PIPE TAPER DIN 3852-1+2
BSPP – BRITISH STANDARD PIPE PARALLEL ISO 1179-1,DIN 3852 T2

Dash Size	Thread Size – Threads Per Inch	BSPP Male Thread Size		BSPP Female Thread Size		BSPT Male Thread Size		BSPT Female Thread Size
usa	Size – TPI	mm	Inch	mm	Inch	mm	Inch	mm	Inch
-2	1/8″ – 28	9.59	0.38	8.6	0.34	9.51	0.37	8.49	0.33
-4	1/4″ – 19	13.01	0.51	11.9	0.47	12.78	0.5	11.19	0.44
-6	3/8″ – 19	16.49	0.65	15.2	0.6	16.31	0.64	14.68	0.59
-8	1/2″ – 14	20.79	0.82	19.1	0.75	20.39	0.8	18.32	0.72
-10	5/8″ – 14	22.81	0.9	20.8	0.82	22.51	0.89	20.59	0.81
-12	3/4″ – 14	26.31	1.04	24.6	0.97	25.91	1.02	23.91	0.94
-16	1″ – 11	33.09	1.3	30.7	1.21	32.59	1.28	29.71	1.17
-20	1.1/4″ – 11	41.79	1.64	39.4	1.55	41.09	1.62	38.59	1.52
-24	1.1/2″ – 11	47.69	1.88	45.5	1.79	47.01	1.85	44.49	1.75
-32	2″ – 11	59.51	2.34	57.4	2.26	58.6	2.31	56.39	2.22

* Thread size refers to the nominal bore of the pipe.
Subtract approx. 1/4″ (6mm) from thread diameter measurement for nominal pipe size.

BSPP & BSPT Thread Identification

BSPP : BSPP male with conical 30° seat (60° included angle) seal against matching conical 30° seat of BSPP female swivel.
BSPP – Form B – Seals using a metal to Metal sealing Edge.
BSPP – Form E – Seals using a Elastomer Seal (Volz WD Seal)
BSPP – Form B can also be used with Captive O-rings or Encapsulated Seals for Chamfered Female Ports or for your preference.
BSPP Positional Elbows and tees have Lock Nut and O ring to allow orientation of fitting to required direction.

BSPT : BSPT male threads seal against threads of a fixed BSPT female.
Contact is made on the flanks of the threads.
Use of Volz thread sealant or Thread Lubricant is recommended for BSPT male to BSPT female connections.

Compatability: Please ring for more information about interchangeability