Dimensions in Inches

Nom. size	Outside Ø (OD)	Slip-on Bore (ID)	No. of Bolt Holes	Ø of Holes	Ø Bolt Circle (BC)	Thickness (T)		Weight (lbs)
						Slip-on	Blind	Slip-on	Blind
4	9.00	4.57	8	0.750	7.50	1.125	1.125	13.90	19.2
5	10.00	5.66	8	0.875	8.50	1.188	1.188	16.30	24.8
6	11.00	6.72	8	0.875	9.50	1.313	1.313	20.40	33.6
8	13.50	8.72	8	0.875	11.75	1.500	1.500	33.40	60.8
10	16.00	10.88	12	1.000	14.25	1.563	1.563	43.70	84.9
12	19.00	12.88	12	1.000	17.00	1.750	1.750	71.30	135.9
14	21.00	14.19	12	1.125	18.75	1.875	1.875	93.70	177.7
16	23.50	16.19	16	1.125	21.25	2.000	2.000	120.10	236.8
18	25.00	18.19	16	1.250	22.75	2.125	2.125	127.30	283.7
20	27.50	20.19	20	1.250	25.00	2.375	2.375	167.70	383.2
24	32.00	24.19	20	1.375	29.50	2.625	2.625	234.30	576.1
26	34.25	*	24	1.375	31.75	2.750	2.750	*	690.1
28	36.50	*	28	1.375	34.00	2.750	2.750	*	782.9
30	38.75	*	28	1.375	36.00	2.875	2.875	*	926.8
36	46.00	*	32	1.625	42.75	3.125	3.209	*	1450.7
38	48.75	*	32	1.625	45.25	3.125	3.394	*	1731.1
40	50.75	*	36	1.625	47.25	3.250	3.533	*	1950.2
42	53.00	*	36	1.625	49.50	3.375	3.695	*	2231.5
44	55.25	*	40	1.625	51.75	3.375	3.857	*	2529.4
48	59.50	*	44	1.625	56.00	3.500	4.159	*	3169.0
54	66.25	*	44	1.875	62.75	3.750	4.651	*	4382.5
60	73.00	*	52	1.875	69.25	3.875	5.116	*	5858.7
66	80.00	*	52	1.875	76.00	4.250	5.601	*	7749.0
72	86.50	*	60	1.875	82.50	4.375	6.066	*	9815.3
78	93.00	*	64	2.125	89.00	4.750		*
84	99.75	*	64	2.125	95.50	4.750		*
90	106.50	*	68	2.438	102.00	5.125		*
96	113.25	*	68	2.438	108.50	5.125		*
102	120.00	*	72	2.688	114.50	5.500		*
108	126.75	*	72	2.688	120.75	5.500		*
120	140.25	*	76	2.938	132.75	5.875		*
132	153.75	*	80	3.188	145.75	6.250		*
144	167.25	*	84	3.438	158.25	6.750		*

* The purchaser shall specify the ID of the flange for nominal pipe sizes 26 in. and larger.  The diameter of the flange bore shall not exceed the pipe OD by more than .25 in.