STRAIGHT UNION (BU)

Designations	Tube O.D	d	Width across flat		t	ℓ/t	Approx.
Designations	D	d	H1	H	t	ℓ/t	L
BU-04	4	2.5	12	12	6.0	20	35
BU-06	6	4	14	14	7.0	30	51
BU-08	8	6	17	17	7.0	31	52
BU-10	10	8	17	19	7.0	31	54
BU-12	12	10	19	22	7.0	31	54
BU-15	15	12	24	27	7.5	36	61
BU-16	16	13	27	30	7.5	36	61
BU-18	18	14	27	32	8.0	36	61
BU-20	20	17	30	36	8.0	38	63
BU-22	22	18	32	36	9.0	38	63
BU-25	25	20	36	41	10.0	39	66
BU-28	28	22	41	46	10.0	43	71
BU-30	30	25	41	46	10.0	43	72
BU-32	32	26	46	50	11.0	44	73
BU-35	35	28	46	55	11.0	44	79
BU-38	38	32	50	60	12.0	46	85
BU-40	40	32	55	60	12.0	55	94
BU-42	42	34	55	60	12.0	55	94
BU-50	50	40	65	75	12.0	60	103
BU-81	10.5 (1/8")	8	17	19	7.0	31	54
BU-82	13.8 (1/4")	11	22	24	7.5	36	60
BU-83	17.3 (3/8")	14	27	32	8.0	36	61
BU-84	21.7 (1/2")	18	32	36	9.0	38	63
BU-85	27.2 (3/4")	22	41	46	10.0	43	71
BU-86	34.0 (1")	28	46	55	11.0	44	79
BU-87	42.7 (1 1/4")	34	60	65	12.0	57	98
BU-88	48.6 (1 1/2")	40	65	75	12.0	60	103