outside diameter of neck A , in mm	S for PN 2.5, in mm	S for PN 6, in mm	S for PN 10, in mm	S for PN 16, in mm	S for PN 25, in mm	S for PN 40, in mm
17.2	3	3	3	3	3	3
21.3	3	3	3	3	3	3
26.9	3	3	3	3	3	3
33.7	3	3	3	3	3	3
42.4	3	3	3	3	3	3
48.3	3	3	3	3	3	3
60.3	3	3	3	3	4	4
76.1	4	4	4	4	5	5
88.9	4	4	4	4	6	6
114.3	4	4	4	4	6	6
139.7	5	5	5	5	6	6
168.3	6	6	6	6	8	8
219.1	6	6	6	6	8	10
273	8	8	8	8	10	12
323.9	8	8	8	10	10	12
355.6	8	8	8	10	12	14
406.4	8	8	8	12	14	16
457	8	8	8	12	15	-
508	8	8	8	12	16	-
610	8	8	10	12	18	-
711	8	8	10	14	20	-
813	10	10	12	16	20	-
914	10	10	12	18	-	-
1016	12	12	12	18	-	-
1219	14	14	16	-	-	-