outside diameter of neck A , 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	1.8	1.8	1.8	1.8
21.3	2	2	2	2
26.9	2.3	2.3	2.3	2.3
33.7	2.6	2.6	2.6	2.6
42.4	2.6	2.6	2.6	2.6
48.3	2.6	2.6	2.6	2.6
60.3	2.9	2.9	2.9	2.9
76.1	2.9	2.9	2.9	2.9
88.9	3.2	3.2	3.2	3.2
114.3	3.6	3.6	3.6	3.6
139.7	4	4	4	4
168.3	4.5	4.5	4.5	4.5
219.1	6.3	6.3	6.3	6.3
273	6.3	6.3	7.1	7.1
323.9	7.1	7.1	8	8
355.6	7.1	8	8	8.8
406.4	7.1	8	8.8	11
457	7.1	8	8.8	12.5
508	7.1	8	10	14.2
610	8	8.8	11	16