SAE & ORS Hydraulic Fitting Replacement O-Ring
Chart
Thread size indicates the diameter of the threaded area in fractions of an inch and number of threads per
inch.
NA = not a current CMW part numbered o-ring, or dash size does not occur in current CMW applications
SAE = straight thread fitting that seals by sandwiching a hard o-ring between a shoulder on the male part
and an angular surface at the mouth of the female port.
ORS = o-ring face seal; a type of fitting that seals by compressing a hard, captive o-ring between two flat
parallel faces, one grooved for the o-ring and the other plain to act as the sealing surface
Fraction
Size
Dash
Size
SAE
(Port Seal O-Ring)
ORS
(Face Seal O-Ring)
Thread Size O-Ring P/N Thread Size O-Ring P/N
1/16 1 NA NA NA NA
1/8 2 5/16 - 24 NA NA NA
3/16 3 3/8 - 24 NA NA NA
1/4 4 7/16 - 20 155-760 9/16 - 18 157-037
5/16 5 1/2 - 20 NA NA NA
3/8 6 9/16 - 18 155-705 11/16 - 16 157-038
1/2 8 3/4 -16 155-706 13/16 - 16 157-039
5/8 10 7/8 - 14 155-707 1 - 14 157-040
3/4 12 1-1/16 - 12 155-709 1-3/16 - 12 157-017
7/8 14 1-3/16 - 12 155-747 NA NA
1 16 1-5/16 - 12 155-748 1-7/16 - 12 155-714
1-1/4 20 1-5/8 - 12 155-702 1-11/16 - 12 NA
1-1/2 24 1-7/8 - 12 157-001 2 -12 NA
2 32 2-1/2 - 12 NA NA NA
2-1/2 40 3 - 12 NA NA NA
3 48 3-1/2 - 12 NA NA NA
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