55圆柱管螺纹的型式和尺寸

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（2006-03-13 14:35:28 ）

British Pipe Thread (惠氏管螺纹) -- 圆柱 (BSPP/BSPF)

螺纹代号	基本尺寸	大径 mm d=D	螺距 mm p	每英寸牙数 tpi	中径 mm d2=D2	小径 外螺纹 d3	牙型高度 H1	底孔尺寸 mm
G 1/8	1/8＂	9.728	0.907	28	9.147	8.566	0.581	8.7
G 1/4	1/4＂	13.157	1.337	19	12.301	11.445	0.856	11.6
G 3/8	3/8＂	16.662	1.337	19	15.806	14.95	0.856	15
G 1/2	1/2＂	20.955	1.814	14	19.793	18.631	1.162	19
G 5/8	5/8＂	22.911	1.814	14	21.749	20.587	1.162	20.75
G 3/4	3/4＂	26.441	1.814	14	25.279	24.117	1.162	24.5
G 7/8	7/8＂	30.201	1.814	14	29.039	27.877	1.162	28
G 1	1＂	33.249	2.309	11	31.77	30.291	1.479	30.5
G 1 1/8	1 1/8＂	37.897	2.309	11	36.418	34.939	1.479	35
G 1 1/4	1 1/4＂	41.91	2.309	11	40.431	38.952	1.479	39.5
G 1 3/8	1 3/8＂	44.323	2.309	11	42.844	41.365	1.479	41.5
G 1 1/2	1 1/2＂	47.803	2.309	11	46.324	44.845	1.479	45
G 1 3/4	1 3/4＂	53.746	2.309	11	52.267	50.788	1.479	51
G 2	2＂	59.614	2.309	11	58.135	56.656	1.479	57
G 2 1/4	2 1/4＂	65.71	2.309	11	64.231	62.752	1.479	63
G 2 1/2	2 1/2＂	75.184	2.309	11	73.705	72.226	1.479	72.5
G 2 3/4	2 3/4＂	81.534	2.309	11	80.055	78.576	1.479	79
G 3	3＂	87.884	2.309	11	86.405	84.926	1.479	85.5
G 3 1/4	3 1/4＂	93.98	2.309	11	92.501	91.022	1.479	91
G 3 1/2	3 1/2＂	100.33	2.309	11	98.351	97.372	1.479	97.75
G 3 3/4	3 3/4＂	106.68	2.309	11	105.201	103.722	1.479	104
G 4	4＂	113.03	2.309	11	111.55	110.072	1.479	110.5
G 4 1/2	4 1/2＂	125.73	2.309	11	124.251	122.772	1.479	123
G 5	5＂	138.43	2.309	11	136.951	135.472	1.479	136
G 5 1/2	5 1/2＂	151.13	2.309	11	149.651	148.172	1.479	148.5
G 6	6＂	163.83	2.309	11	162.351	160.872	1.479	161.5