BSPP and PSPT thread dimension check chart

More:2022-03-21 11:18:30

BSPP / BSPT

BRITISH STANDARDPIPE PARALLEL / BRITISHSTANDARD PIPE TAPER

55 Degree Threads

SIZE	TPI	MAJOR (EXT) mm	MINOR (INT) mm	TAP DRILL (mm)
1/8"	28	9.728	8.566	8.70
1/4"	19	13.157	11.445	11.60
3/8"	19	16.662	14.950	15.00
1/2"	14	20.955	18.631	19.00
5/8"	14	22.911	20.587	20.75
3/4"	14	26.441	24.117	24.50
7/8"	14	30.201	27.877	28.00
1"	11	33.249	31.770	30.50
11/8"	11	37.897	34.939	35.00
11/4"	11	41.910	38.952	39.50
13/8"	11	44.323	41.365	41.50
11/2"	11	47.803	44.845	45.00
13/4"	11	53.746	50.788	51.00
2"	11	59.614	56.656	57.00
21/4"	11	65.710	62.752	63.00
21/2"	11	75.184	72.226	72.50
23/4	11	81.534	78.576	79.00
3"	11	87.884	84.926	85.50
31/4"	11	93.980	91.501	91.00
31/2"	11	100.330	97.372	97.75
33/4"	11	106.680	103.722	104.00
4"	11	113.030	110.072	110.50
41/2"	11	125.730	122.772	123.00
5"	11	138.430	135.472	136.00
51/2"	11	151.130	148.172	148.50
6"	11	163.830	160.872	161.50

NOTE: G = BSPP / R = BSPT

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