UHPLC unions

Stainless steel UHPLC union Back to main content

UHPLC bulkhead union

Stainless steel UHPLC bulkhead union Back to main content
stainless UHPLC bulkhead union

Internal unions have female threads and a fitting detail for zero volume fittings. The nuts have male (external) threads. Standard material is 300 series stainless. Also available in Hastelloy C, gold-plated stainless, and titanium versions.

Select the union with the bore that matches the ID of the tubing. If the IDs are different, choose the union with a bore which matches the smaller tube bore.

stainless bulkhead union

Bulkhead versions are designed to be mounted through an instrument panel or on a bracket. The fitting body is undercut so that it bites into the panel when the mounting nut is tightened, eliminating the need for a lock washer.

Standard Unions

Tubing OD Bore Product No.
1/32" 0.15 mm ZU.5XC
0.25 mm ZU.5
0.50 mm ZU.5L
1/32" ZU.5T
1/16" 0.15 mm ZU1XC
0.25 mm ZU1C
0.50 mm ZU1M
0.75 mm ZU1
1.0 mm ZU1L
1/16" ZU1T
1/8" 0.75 mm ZU2
2.0 mm ZU2L
1/8" ZU2T

Bulkhead Unions

The "Hole" heading in the table below refers to the size of the hole required for mounting the union through a bulkhead or panel.

Tubing OD Bore Hole Product No.
1/32" 0.15 mm 5/16" ZBU.5XC
0.25 mm 5/16" ZBU.5
0.50 mm 5/16" ZBU.5L
1/32" 5/16" ZBU.5T
1/16" 0.15 mm 5/16" ZBU1XC
0.25 mm 5/16" ZBU1C
0.50 mm 5/16" ZBU1M
0.75 mm 5/16" ZBU1
1.0 mm 5/16" ZBU1L
1/16" 5/16" ZBU1T
1/8" 0.75 mm 7/16" ZBU2
2.0 mm 7/16" ZBU2L
1/8" 7/16" ZBU2T




With a bulkhead union, an O-ring can be installed between the body and the panel to allow operation in purged environments.