Industry Standard Class 125 Light-weight Blind Flanges

Nominal Pipe Size	Outside Diameter (O)	Thickness (T)	Approximate Weight	Number of Bolt Holes	Diameter of Bolt Holes	Diameter of Bolt Circle (C)
4	9.00 mm	0.50 mm	10 lb	8	0.75 mm	7.50 mm
5	10.00 mm	0.56 mm	12 lb	8	0.88 mm	8.50 mm
6	11.00 mm	0.56 mm	15 lb	8	0.88 mm	9.50 mm
8	13.50 mm	0.56 mm	22 lb	8	0.88 mm	11.75 mm
10	16.00 mm	0.69 mm	37 lb	12	1.00 mm	14.25 mm
12	19.00 mm	0.69 mm	54 lb	12	1.00 mm	17.00 mm
14	21.00 mm	0.75 mm	71 lb	12	1.13 mm	18.75 mm
16	23.50 mm	0.75 mm	89 lb	16	1.13 mm	21.25 mm
18	25.00 mm	0.75 mm	100 lb	16	1.25 mm	22.75 mm
20	27.50 mm	0.75 mm	121 lb	20	1.25 mm	25.00 mm
22	29.50 mm	1.00 mm	185 lb	20	1.38 mm	27.25 mm
24	32.00 mm	1.00 mm	220 lb	20	1.38 mm	29.50 mm
26	34.25 mm	1.00 mm	251 lb	24	1.38 mm	31.75 mm
28	36.50 mm	1.00 mm	285 lb	28	1.38 mm	34.00 mm
30	38.75 mm	1.00 mm	322 lb	28	1.38 mm	36.00 mm
32	41.75 mm	1.13 mm	418 lb	28	1.63 mm	38.50 mm
34	43.75 mm	1.13 mm	458 lb	32	1.63 mm	40.50 mm
36	46.00 mm	1.13 mm	508 lb	32	1.63 mm	42.75 mm
38	48.75 mm	1.13 mm	575 lb	32	1.63 mm	45.25 mm
40	50.75 mm	1.13 mm	620 lb	36	1.63 mm	47.25 mm
42	53.00 mm	1.25 mm	755 lb	36	1.63 mm	49.50 mm
44	55.25 mm	1.25 mm	820 lb	40	1.63 mm	51.75 mm
46	57.25 mm	1.25 mm	882 lb	40	1.63 mm	53.75 mm
48	59.50 mm	1.38 mm	1050 lb	44	1.63 mm	56.00 mm
50	61.75 mm	1.38 mm	1120 lb	44	1.88 mm	58.25 mm
52	64.00 mm	1.38 mm	1205 lb	44	1.88 mm	60.50 mm
54	66.25 mm	1.38 mm	1300 lb	44	1.88 mm	62.75 mm
60	73.00 mm	1.50 mm	1725 lb	52	1.88 mm	69.25 mm
66	80.00 mm	1.50 mm	2075 lb	52	1.88 mm	76.00 mm
72	86.50 mm	1.50 mm	3280 lb	60	1.88 mm	82.50 mm
78	93.00 mm	1.75 mm	3280 lb	64	2.13 mm	89.00 mm
84	99.75 mm	1.75 mm	3761 lb	64	2.13 mm	95.50 mm
90	106.50 mm	2.00 mm	4866 lb	68	2.38 mm	102.00 mm
96	113.25 mm	2.00 mm	5527 lb	68	2.38 mm	108.50 mm

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