O’Keefe Controls Co.
O’Keefe Controls Co.
4 Maple Drive
Monroe, CT 06468
Phone: 203.261.6711
Email: info@okeefecontrols.com • Website: www.okeefecontrols.com
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    Precision orifice assemblies that adapt to common fittings used in process instruments and hydraulic systems are shown. Types K4, R4 and RG4 are used with nominal 1/4" tube fittings. Type BFS is for 45° flare fittings and Type CFJ is for 37° flare fittings. Type OD is a pipe adapter.
Precision Metal Orifices VCR Gaskets
Precision Metal Orifices - VCR Gaskets - Line Drawing
Unit of Measure
1 2 3 4 5 

Part Number

Orifice Diameter

Material

CV

R4-29-SS N/A 0.029 in N/A 316 SS N/A 0.019
R4-31-SS N/A 0.031 in N/A 316 SS N/A 0.022
R4-32-SS N/A 0.032 in N/A 316 SS N/A 0.024
R4-33-SS N/A 0.033 in N/A 316 SS N/A 0.025
R4-35-SS N/A 0.035 in N/A 316 SS N/A 0.028
R4-37-SS N/A 0.037 in N/A 316 SS N/A 0.031
R4-38-SS N/A 0.038 in N/A 316 SS N/A 0.032
R4-39-SS N/A 0.039 in N/A 316 SS N/A 0.033
R4-40-SS N/A 0.04 in N/A 316 SS N/A 0.036
R4-41-SS N/A 0.041 in N/A 316 SS N/A 0.038
R4-42-SS N/A 0.042 in N/A 316 SS N/A 0.039
R4-43-SS N/A 0.043 in N/A 316 SS N/A 0.041
R4-47-SS N/A 0.047 in N/A 316 SS N/A 0.048
R4-52-SS N/A 0.052 in N/A 316 SS N/A 0.059
R4-55-SS N/A 0.055 in N/A 316 SS N/A 0.068
R4-60-SS N/A 0.06 in N/A 316 SS N/A 0.081
R4-63-SS N/A 0.063 in N/A 316 SS N/A 0.088
R4-67-SS N/A 0.0670 in N/A 316 SS N/A 0.100
R4-70-SS N/A 0.0700 in N/A 316 SS N/A 0.110
R4-73-SS N/A 0.0730 in N/A 316 SS N/A 0.120
R4-76-SS N/A 0.0760 in N/A 316 SS N/A 0.130
R4-79-SS N/A 0.0790 in N/A 316 SS N/A 0.140
R4-81-SS N/A 0.0810 in N/A 316 SS N/A 0.150
R4-86-SS N/A 0.0860 in N/A 316 SS N/A 0.170
R4-89-SS N/A 0.0890 in N/A 316 SS N/A 0.180
Unit of Measure
1 2 3 4 5