OPTI-KLEAR ®

Located in Omaha, Nebraska, our team has over 70 years of Sight Glass experience.

OK SERIES SIGHT GLASSES

JIKOH Manufacturing's OK or OPTI-KLEAR ® series sight glasses are designed for use with standard fuel and dry bulk applications. Our OK series sight glasses are machined on CNC machining centers and CNC lathes to impart the best optical sight glasses on the market.

Our sight glasses are machined flat on both sidewalls to keep the sidewall tolerances in line with standard API flanges and meet TTMA specifications. All of our sight glasses are annealed to help reduce cracking and crazing caused by certain fuel additives. Each JIKOH sight glass is heat stamped with a date code and part number.

JIKOH MFG., INC. recommends replacing sight glasses with new OPTI-KLEAR ® sight glasses during your "annual external visual inspection". See CFR part 180 of title 49.

**WARNING** Solvents that may damage Sight Glasses include, but are not limited to: NAPTHA, BENZENE, XYLENE, TOLUENE, METHANOL, MTBE, DME

PART NUMBERINSIDE DIAMETEROUTSIDE DIAMETERBOLT HOLE CIRCLE(BHC)# BOLT HOLESBOLT HOLE DIA.(BHD)NOMINAL THICKNESS
OK2S2.500"4.500"3.750"60.468"1.750"
OK3S3.500"6.000"4.875"80.468"1.750"
OK3B3.500"6.000"4.875"80.468"1.750"
OK4B4.000"7.000"5.875"80.468"1.750"
OK4S4.250"7.000"5.875"80.468"1.750"
OK4BCT4.000"7.075"5.875"80.468"1.500"
OK4SCT4.250"7.075"5.875"80.468"1.500"
OK4S14.250"7.000"5.875"80.468"1.000"
OK5S5.375"8.000"7.000"80.468"1.750"
OK6S 1 1/26.125"11.000"9.125"80.468"1.500"
OK6S 1 3/46.125"11.000"9.125"80.468"1.750"
The Answer for Ethanol

JDG-105 SERIES SIGHT GLASSES

JIKOH Manufacturing's JDG-105 Series sight glasses are designed to be used with Ethanol and Bio Diesel fuels. Our JDG-105 Series sight glasses have successfully been tested in our lab and on petroleum trailers carrying E-10, E-85, 100% Ethanol, Ultra Low Diesel and 5% Soy Diesel against cracking and crazing.

All JIKOH JDG-105 Sight Glasses have a label on the outside circumference to identify it as a JDG-105. All JIKOH JDG-105 Sight Glasses have the letter "E" heat stamped on the outer circumference to identify it as Ethanol compatible and visible for your annual inspection.

PART NUMBERINSIDE DIAMETEROUTSIDE DIAMETERBOLT HOLE CIRCLE(BHC)# BOLT HOLESBOLT HOLE DIA.(BHD)NOMINAL THICKNESS
JDG-1054.000"7.075"5.875"80.468"1.500"
JDG-1052S2.500"4.500"3.750"60.468"1.500"
JDG-1053B3.500"6.000"4.875"80.468"1.500"
JDG-1054S14.250"7.060"5.875"80.468"1.000"