Your search for "connectors" revealed the following:
Multi-Purpose, ISO 7241 series B Interchange, Hydraulic Quick Couplings - 60 Series
S$0.00
Vendor: APSS Store
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Stainless Steel Swagelok Tube Fitting, Male Elbow, 1/2 in. Tube OD x 3/8 in. Male NPT
S$34.66
Vendor: APSS Store
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V-1054-Q: Pop-A-Plug® CPI/Perma Heat Exchanger & Condenser Tube Plugging System
S$0.00
Vendor: APSS Store
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