Swagelok SS-4FK0-3 is a 316 stainless steel medium-pressure tube fitting designed as a union tee with 1/4 in. tube OD connections. It enables clean, high-integrity branching in pressure-critical systems, providing leak-tight gas seal and vibration resistance up to 20,000 psig (1378 bar). This makes it ideal for modular layouts and compact routing.

Specifications

Attribute	Value
Body Material	316 Stainless Steel
Cleaning Process	Standard Cleaning and Packaging (SC-10)
Connection 1 Size	1/4 in.
Connection 1 Type	Swagelok® Medium-Pressure Tube Fitting
Connection 2 Size	1/4 in.
Connection 2 Type	Swagelok® Medium-Pressure Tube Fitting
Connection 3 Size	1/4 in.
Connection 3 Type	Swagelok® Medium-Pressure Tube Fitting
Flow Restrictor	No
eClass (4.1)	37020716
eClass (5.1.4)	37020590
eClass (6.0)	37020590
eClass (6.1)	37020590
eClass (10.1)	37020590
UNSPSC (4.03)	40141700
UNSPSC (10.0)	40142600
UNSPSC (11.0501)	40142600
UNSPSC (13.0601)	40183100
UNSPSC (15.1)	40183100
UNSPSC (17.1001)	40183102

WARNING

Do not mix/interchange Swagelok products or components not governed by industrial design standards, including Swagelok tube fitting end connections, with those of other manufacturers.