Polyphenylene Sulfide (PPS) Flangeless Nut – 1/4''-28

VICI Jour SKU: JR-55072-10

Quantity: 10
Size: 2mm
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An economically priced alternative to PEEK, this series of PPS ¼-28 nuts offers three low-pressure sealing options: inverted ferrule, flanged with washer, or VICI Jour’s patented collapsible ferrule.

These nuts provide excellent chemical and pressure resistance for 1/16” or ⅛” tubing (and 1/32” with inverted ferrule). They are fingertight when used with our Color-Sleeve adapters.


Color-Sleeve adapters turn PPS nuts into fingertight fittings and color-code different solvent lines for easy identification.

A PPS nut may also be used with a PEEK ferrule and stainless-steel bushing for high-pressure applications.


A = suitable

B = marginal

C = not recommended

Chemical class Resistance

Acids, organic

Acids, inorganic B / C*
Aldehydes A
Alcohols A
Bases B
Esters A
Halogenated org. A/B
Hydrocarbons A
Ketones A

* Not recommended for use with concentrated halogen acids

For more detailed chemical resistance information, refer to Chemical Resistance of PEEK and other Polymers

For 1/16” or ⅛” OD tubing, and for 1/32” OD tubing with inverted ferrule

Material: PPS (Polyphenylene sulfide)

Threads: 1/4-28 threads

Pressure Rating: (varies with tubing material and ID)

OD Bar Psi
1/16" 105 1500
1/8" 35 500

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