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Fitting (Perm) Thermo SAE 37

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Description & Features

The Fitting (Perm) Thermo SAE 37 from Danfoss Power Solutions (II LLC Aeroquip) is engineered for maximum performance and durability featuring an innovative design that enhances uptime. Crafted from carbon steel it boasts Dura-Kote plating to ensure superior corrosion resistance extending the hose assembly life.

Designed for reliability it features a female end with JIC 37 and Line/Hose/Tube end types. The hex size at End 2 is 0.6875 and it fits a hose dash size of -4. The product width measures 0.83 inches. This fitting is not adjustable and does not include additional components such as a check valve case blades or battery.

Engineered to meet the stringent demands of industrial applications this fitting is not machine mountable and does not require a mandrel for installation ensuring ease of use and reliability in various settings.

Supplier Part Number: 4TA6FJ4

Specifications

Brand
Synflex Optimum by Danfoss
a Dimensions
2.15 in
Compatible Hose ID
1/4 in
Connection Size 1
1/4 in
Connection Size 2
3/8 in
Connection Type
Female JIC Swivel, Hose
Connection Type 1
Hose
Connection Type 2
Female 37 deg JIC Swivel
Construction Style
Crimp
Cut-Off Factor
1.115 in
Dimensions
1.99 in L x 0.826 in W x 0.826 in H
End Gender 1
Female
End Size 1
9/16 in
Finish
Dura-Kote™
Fitting Type
Hose Fitting
For Use With
3TR18CT, 3TR8, 3TR8N, 3TR7 and 3TR7N Series Hoses
Hex Size
0.669 x 0.551 in
Hose Dash Size
04
Inside Diameter
0.17 in
Material
Steel
Material Construction
Carbon Steel
Series
4T Series
Thread Sealant
Without Thread Sealant
Thread Size
9/16-18
Thread Type
UNF

Product Questions & Answers (2)

Question by: Frank C on Feb 6, 2026, 12:53 PM
This fitting got a female JIC 37 end on it, does that mean it'll mate up with a standard male JIC 37 flare fitting on my hydraulic line?
Answer by: Customer Support on Feb 8, 2026, 8:29 AM
Female JIC 37 on End 1 pairs with a male JIC 37 counterpart, so yes, that connection will mate up with a standard male JIC 37 flare. End 2 is a Line/Hose/Tube end sized for a -4 hose dash size, so make sure your hose matches that before putting it together. The hex at End 2 measures 0.6875 inches if you need to know what wrench to grab.
Question by: Glen R on Jun 11, 2025, 9:47 AM
What size hose does this fitting work with? I'm using a -4 size right now.
Answer by: Customer Support on Jun 12, 2025, 10:40 AM
This fitting is designed to work with a hose dash size of -4, so it should be a good fit for your current setup.

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