Plugs & caps

Quickly seal off ports and tubing

Biotech Fluidics maintain a comprehensive assortment of caps & plugs for different port geometries and situations. Plugs are available in several different materials for flat-bottom ports 6-40, 10-32, 1/4-28, M6x1, and 5/16-24, plus 6-32 & 10-32 coned port designs. Caps are available in ETFE for 10-32, 1/4-28, and M6x1 port geometries.

Plugs can close off unused ports in valves and multi-port connectors or seal columns to prevent them from drying out. Caps allows open tubing ends to be covered to avoid extended exposure to open air.

Product details

Part No.*DescriptionHead StyleMaterial
P-123Plug for 1/4-28 Flat-Bottom Ports5/16” HexETFE Natural
P-309Plug for 1/4-28 Flat-Bottom PortsStandard KnurlDelrin Black
P-311Plug for 1/4-28 Flat-Bottom PortsStandard KnurlETFE Natural
P-314Plug for M6x1 Flat-Bottom PortsStandard KnurlETFE Black
P-316Plug for 1/4-28 Flat-Bottom PortsStandard KnurlPFA Natural
P-321Plug for 1/4-28 Flat-Bottom Ports, FlushNut™FlushNutPEEK Natural
P-520Plug for 10-32 Coned Ports5/16” HexSST
P-550Plug for 10-32 Coned PortsExtra Long Standard KnurlPEEK Natural
P-551Plug for 10-32 Coned PortsStandard KnurlPEEK Natural
P-555Plug for 6-32 Coned PortsStandard Micro KnurlPEEK Natural
P-556Plug for 5/16-24 Flat-Bottom PortsStandard KnurlPEEK Natural
P-558Plug for 5/16-24 Flat-Bottom PortsMicro Headless KnurlPEEK Green
P-849Plug for 10-32 Flat-Bottom PortsStandard KnurlDelrin Black
U-467RPlug for 10-32 Coned PortsStandard KnurlDelrin Red
VHP-600VHP Plug for 10-32 Coned Ports3/8” HexPK-SST
P-754Cap for 10-32 Coned PortsStandard KnurlETFE Yellow
P-755Cap for 1/4-28 Flat-Bottom PortsStandard KnurlETFE Black
P-756Cap for M6 Flat-Bottom PortsStandard KnurlETFE Blue


Consult the Periodic Table of Analytical Fittings for a quick overview, the Fittings 101 for guidance and learning, and the IDEX Catalogue for product details, or contact Biotech Fluidics for expert advice.

Periodic table of
analytical fittings

Fittings 101
guide booklet

Complete IDEX

Any questions?

If you have any inquiries about our products and services, we’re here to help.

Phone: +46 300 56 91 80