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Duolok calibration unions are used to connect tube systems to pressure transmitters. SSP offers calibration unions with 1/4-28 UNF and 5/16-24 UNF and 5/16-24 UNF threads typically used with Honeywell and Rosemont units respectively.
Calibration tube fitting
Unit of Measure
1 

Item #

CAD

Body Material

Connection 1 - Type

Connection 1 - Size

Connection 2 - Type

Connection 2 - Size

ISSD4CU1 N/A CAD Icon (for items table) N/A 316 SS N/A Tube Fitting N/A 1/4 in N/A Calibration N/A 1/4-28 UNF
ISSD4UCU2 N/A CAD Icon (for items table) N/A 316 SS N/A Tube Fitting N/A 1/4 in N/A Calibration N/A 5/16-24 UNF
IMD4CU1 N/A CAD Icon (for items table) N/A Alloy 400 N/A Tube Fitting N/A 1/4 in N/A Calibration N/A 1/4-28 UNF
IMD4UCU2 N/A CAD Icon (for items table) N/A Alloy 400 N/A Tube Fitting N/A 1/4 in N/A Calibration N/A 5/16-24 UNF
IHCD4CU1 N/A CAD Icon (for items table) N/A Alloy C-276 N/A Tube Fitting N/A 1/4 in N/A Calibration N/A 1/4-28 UNF
IHCD4UCU2 N/A CAD Icon (for items table) N/A Alloy C-276 N/A Tube Fitting N/A 1/4 in N/A Calibration N/A 5/16-24 UNF
Unit of Measure
1