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	10.00	4.57	8	0.875	7.88	1.130	1.130	18.30	23.6
5	11.00	5.66	8	0.875	9.25	1.210	1.210	22.30	30.9
6	12.50	6.73	12	0.875	10.63	1.310	1.310	29.70	42.9
8	15.00	8.73	12	1.000	13.00	1.310	1.310	39.90	62.1
10	17.50	10.88	16	1.125	15.25	1.500	1.500	56.00	95.5
12	20.50	12.88	16	1.250	17.75	1.630	1.630	83.20	143.4
14	23.00	14.19	20	1.250	20.25	1.940	1.940	127.90	214.9
16	25.50	16.19	20	1.375	22.50	2.140	2.140	166.80	291.7
18	28.00	18.19	24	1.375	24.75	2.250	2.250	204.20	369.8
20	30.50	20.19	24	1.375	27.00	2.330	2.330	247.40	458.8
22	33.00	22.19	24	1.375	29.25	2.500	2.500	306.70	580.6
24	36.00	24.19	24	1.625	32.00	2.690	2.690	387.60	737.9
26	38.25	*	28	1.875	34.50	3.000	3.000	*	911.0
28	40.75	*	28	1.875	37.00	3.130	3.130	*	1088.0
30	43.00	*	28	1.875	39.25	3.150	3.166	*	1233.3
32	45.25	*	28	1.875	41.50	3.250	3.332	*	1445.2
34	47.50	*	28	1.875	43.50	3.380	3.475	*	1668.6
36	50.00	*	32	2.125	46.00	3.460	3.671	*	1924.2
38	52.25	*	32	2.125	48.00	3.500	3.815	*	2195.0
40	54.25	*	36	2.125	50.25	3.630	3.982	*	2463.8
42	57.00	*	36	2.125	52.75	3.810	4.171	*	2864.7
44	59.25	*	36	2.125	55.00	4.000	4.338	*	3231.9
46	61.50	*	40	2.125	57.25	4.130	4.505	*	3610.6
48	65.00	*	40	2.125	60.75	4.500	4.781	*	4302.9

* 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.