Dimensions of U-bolt (not to grip pipe)

All dimensions in millimeters

Nom. pipe size	pip o.d.	A dia.	N	M	K	S max.
15	21.3	8	40	45	25	10
20	26.9	8	45	55	30	10
25	33.7	8	50	60	30	10
32	42.4	8	60	70	30	10
40	48.3	10	65	85	40	16
50	60.3	10	80	100	40	16
65	76.1	12	95	120	50	19
80	88.9	16	110	140	55	19
100	114.3	16	140	165	55	19
125	139.7	16	165	190	55	19
150	168.3	20	195	225	65	19
175	193.7	20	220	250	65	19
200	219.1	20	220	250	65	19
225	244.5	20	275	300	65	19
250	273.0	20	305	335	75	22
300	323.9	20	355	385	75	22
350	355.6	24	390	425	80	22
400	406.4	24	440	475	80	22
450	457.0	24	495	525	80	22
500	508.0	24	545	575	80	22
550	559.0	24	595	625	80	22
600	610.0	24	645	675	80	22
Cast iron pipes
80	98	16	120	150	55	19
^a 100	118	16	140	165	55	19
^a 150	170	20	195	225	65	19
^a 200	222	20	250	275	65	19
^a 250	274	20	305	335	75	22
^a 300	326	20	355	385	75	22
350	378	24	410	450	80	22
400	429	24	465	500	80	22
450	480	24	520	550	80	22
500	532	24	570	600	80	22
600	635	24	670	700	80	22
^a These U-bolts are identical with the equivalent sizes for steel pipe.