OK SERIES SIGHT GLASSES
DESIGNED FOR STANDARD FUEL & DRY BULK APPLICATIONS
PART NUMBER ID OD B.H.C. B.H.D. # BOLTS THICKNESS BEVELED ID
OK2S 2.50" 4.50" 3.750" .468" 6 1 3/4" NO
OK3B 3.50" 6.00" 4.875" .468" 8 1 3/4" YES
OK3S 3.50" 6.00" 4.875" .468" 8 1 3/4" NO
OK4B 4.00" 7.00" 5.875" .468" 8 1 3/4" YES
OK4S 4.25" 7.00" 5.875" .468" 8 1 3/4" NO
OK4BCT 4.00" 7.075" 5.875" .468" 8 1 1/2" YES
OK4SCT 4.25" 7.075" 5.875" .468" 8 1 1/2" NO
OK4S1 4.25" 7.00" 5.875" .468" 8 1.00" NO
OK5S 5.375" 8.00" 7.00" .468" 8 1 1/2" NO
OK6S 6.125" 11.00" 9.125" .562" 8 1 1/2" NO
OKB12 6.69" 9.00" 8.13" .500" 12 1 1/2" YES
OKS12 6.69" 9.00" 8.13" .500" 12 1 1/2" NO
**Ethanol and solvents that may damage OK series sight glasses include, but are not limited to: Benzene,
DME, Methanol, MTBE, Naptha, Toluene and Xylene. Testing with these solvents is required
to determine compatibility.