SAME DAY SHIPPING
— Order by 2pm EST.
Toggle Nav
Cart
Search
main product photo

Brass Duolok Tube Fitting, 0.38 Inch Tube OD Union Tee

Ask A Question

Description & Features

Designed for precision and reliability, the Brass Duolok Tube Fitting, 0.38 Inch Tube OD Union Tee is an essential component for instrumentation and process tubing systems. This union tee features a robust double ferrule design that ensures leak-proof connections even with variations in tubing materials, hardness, and wall thickness. Crafted from premium CA360 and CA345 brass bar stock, it adheres to ASTM B-16 and ASTM B-453 standards, while the shaped bodies are precision-forged from CA-377 brass compliant with ASTM B-124.

Compatible with copper tubing, Duolok® fittings are engineered for gaugeability, allowing for correct pull-up during installation, and are interchangeable with Swagelok® brand fittings. These fittings maintain performance across a wide range of operating temperatures, although elevated temperatures may affect pressure capabilities. For applications requiring specific pressure ratings, consult with us for guidance.

SKU: IBD6UT

Supplier Part Number (MPN): IBD6UT

Alternate Part Numbers: C1FN75, MI-08750168, MINO-00766X89679

Specifications

Brand
SSP
ax Dimensions
1.2 in
b Dimensions
1.82 in
bx Dimensions
0.91 in
Connection Size 1
3/8 in
Connection Size 2
3/8 in
Connection Size 3
3/8 in
Connection Type
Tube
Connection Type 1
Tube
Connection Type 2
Tube
Connection Type 3
Tube
Dimensions
2.4 in L
e Dimensions
0.28 in
Fitting Type
Tee
For Use With
Copper Tubing
Hex Size
11/16 in
Material
Brass
Material Construction
Brass
Series
UT Series
Sg Gageability
Duolok® Tube Fittings are Designed, Manufactured and Quality Controlled to be Gaugeable for Sufficient Pull-up During Initial Installation
Sg Interchangeability
Duolok® Tube Fittings are Designed, Manufactured and Quality Controlled to be Totally Interchangeable with the Swagelok® Brand of Tube Fittings
Sg Material
Straight Fittings are Machined From CA360 and CA345 Premium Brass Bar Stock in Accordance with ASTM B-16 and ASTM B-453, Shaped Bodies are Machined From Precision Forgings of CA-377 Brass in Accordance with ASTM B-124
Sg Pressure Rating
Generally, Duolok® Tube Fittings are Rated for Pressures Equal to the Maximum Allowable Working Pressures of the Tubing Recommended for Use with the Fittings (Copper Tubing), Some Specially Designed Fittings, Bored-through Fittings, an Fittings, O-ring Se
Sg Temperature Factors
Duolok® Tube Fittings Function Reliably in an Extremely Wide Range of Operating Temperatures, Elevated Temperatures will Reduce the Maximum Working Pressure Capability of the Tubing System, for Applications at Elevated Temperatures
Tube OD
3/8 in

Product Questions & Answers (2)

Question by: Kurt C on Apr 6, 2026, 6:15 PM
How tight should I make this thing? Don't wanna strip it out.
Answer by: Customer Support on Apr 8, 2026, 8:09 AM
Duolok fittings are gaugeable, so you can ensure sufficient pull-up during the initial installation. Contact us for detailed assembly instructions to get it just right.
Question by: Connie W on Jul 25, 2025, 5:51 PM
got a run of 3/8 copper tube i need to tee off, is this the right kind of fitting for that
Answer by: Customer Support on Jul 27, 2025, 12:17 PM
For copper tubing, this union tee is made to connect 3/8 inch tube OD on all three ends, so it’s a good match when you’re splitting a 3/8 copper line into a branch. It’s a double ferrule Duolok style fitting meant for instrumentation and process tubing hookups.

Tell us what you need and we'll get back to you.

Fields marked * are required.