International Measuring and Identification Guide - SAE Code 61 and Code 62 - Four-Bolt Flange SAE J518

Nom. Bolt Dimensions Bolt Hole Spacing Flange Head
Flange"A""B"O.D.
SizeCode 61Code 62Code 61Code 62Code 61Code 62
1/211/1623/321 1/21 19/321 3/161 1/4
3/47/815/161 7/821 1/21 5/8
11 1/321 3/322 1/162 1/41 3/41 7/8
1 1/41 3/161 1/42 5/162 5/822 1/8
1 1/21 13/321 7/162 3/43 1/82 3/52 1/2
21 11/161 3/43 1/163 13/162 13/163 1/5
The male SAE Code 61 and Code 62 flange connection have an O-ring in the face and no threads.
The male connection is secured around the female port with a 4-bolt split flange.
The seal takes place on the O-ring which is compressed between the flange and the surface surrounding the female port.
Torquing the 4-bolt split flange to a specific value retains the connection.
SAE Code 61 and Code 62 flanges are interchangeable with JIS except for the 4-bolt split flanges.