Head Depths Reference Chart

A.S.M.E., Standard, Shallow, Flanged & Dished

Note: OAH = IDD + SF + THK  (Actual measurements may vary)

OD A.S.M.E
F & D 		Standard
F & D 		Shallow
F & D 		Max. SF Circumferences
24 4 5/16 2 4 5/16 2 3 7/16 2 1/2 6′ – 3 13/32″
26 4 5/8 2 4 5/8 2 3 5/8 2 1 6′ – 9 11/16″
28 4 7/8 2 4 7/8 2 3 13/16 2 1 7′ – 3 31/32″
30 5 1/8 2 5 1/8 2 3 15/16 2 1 7′ – 10 1/4″
32 5 3/8 2 5 3/8 2 4 1/8 2 1 8′ – 4 17/32″
34 6 1/4 3 5 11/16 2 4 5/16 2 1 8′ – 10 13/16″
36 6 9/16 3 5 15/16 2 4 1/2 2 1 9′ – 5 3/32″
38 6 13/16 3 6 3/16 2 4 5/8 2 1 1/2 9′ – 11 3/8″
40 7 1/16 3 6 7/16 2 4 13/16 2 1 1/2 10′ – 5 21/32″
42 7 5/16 3 6 3/4 2 5 2 1 1/2 10′ – 11 15/16″
44 7 5/8 3 7 2 5 3/16 2 1 1/2 11′ – 6 7/32″
46 7 7/8 3 7 1/4 2 5 5/16 2 1 1/2 12′ – 1/2″
48 8 1/8 3 7 1/2 2 5 1/2 2 1 1/2 12′ – 6 25/32″
50 8 3/8 3 7 13/16 2 5 11/16 2 1 1/2 13′ – 1 3/32″
52 9 1/4 4 8 1/16 2 5 7/8 2 1 1/2 13′ – 7 3/8″
54 9 1/2 4 8 5/16 2 6 2 1 1/2 14′ – 1 21/32″
56 9 13/16 4 8 5/8 2 6 3/16 2 1 1/2 14′ – 7 15/16″
58 10 1/16 4 8 7/8 2 6 3/8 2 1 1/2 15′ – 2 7/32″
60 10 5/16 4 9 1/8 2 6 1/2 2 1 1/2 15′ – 8 1/2″
62 10 5/8 4 9 3/8 2 6 11/16 2 1 1/2 16′ – 2 25/32″
64 10 7/8 4 9 11/16 2 6 7/8 2 1 1/2 16′ – 9 1/16″
66 11 1/8 4 9 15/16 2 7 1/16 2 1 1/2 17′ – 3 11/32″
68 12 5 10 3/16 2 7 3/16 2 1 1/2 17′ – 9 5/8″
70 12 1/4 5 10 7/16 2 7 3/8 2 1 1/2 18′ – 3 29/32″
72 12 1/2 5 10 3/4 2 7 /16 2 1 1/2 18′ – 10 3/16″
74 12 13/16 5 11 2 7 3/4 2 1/2 19′ – 4 15/32″
76 13 1/16 5 11 1/4 2 7 7/8 2 1 1/2 19′ – 10 3/4″
78 13 5/16 5 11 9/16 2 8 1/16 2 1 1/2 20′ – 5 1/32″
80 13 5/8 5 11 13/16 2 8 1/4 2 1 1/2 20′ – 11 5/16″
82 13 7/8 5 12 1/16 2 8 7/16 2 1 1/2 21′ – 5 5/8″
84 14 3/4 6 12 5/16 2 8 9/16 2 1 1/2 21′ – 11 29/32″
86 15 6 12 5/8 2 8 3/4 2 1 1/2 22′ – 6 3/16″
88 15 1/4 6 12 7/8 2 8 15/16 2 1 1/2 23′ – 15/32″
90 15 1/2 6 13 1/8 2 9 1/8 2 1 1/2 23′ – 6 3/4″
92 15 13/16 6 13 7/16 2 9 1/4 2 1 1/2 24′ – 1 1/32″