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Fitting (Perm) Thermo NPSM FEMale

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Description & Features

Engineered to extend hose assembly life the fitting features an innovative design for optimal performance. The Dura-Kote plating ensures superior corrosion resistance making it suitable for demanding operational environments.

Designed for applications requiring a female NPSM connection the Fitting (Perm) Thermo NPSM FEMale by Danfoss Power Solutions is crafted from robust carbon steel offering reliable and long-lasting service. With an end size of 0.25 inches and a hose dash size of -4 it seamlessly integrates into various industrial and commercial systems.

The female end type and 0.6875-inch hex size enable secure and precise connections while the specific construction supports maximum uptime for critical systems. As it does not require adjustment it simplifies installation and maintenance processes enhancing overall efficiency.

MPN: 4TA4SP4

Specifications

Brand
Synflex Optimum by Danfoss
a Dimensions
1.98 in
Compatible Hose ID
1/4 in
Connection Size 1
1/4 in
Connection Size 2
1/4 in
Connection Type
FNPSM Swivel, Hose
Connection Type 1
Hose
Connection Type 2
FNPSM Swivel
Construction Style
Crimp
Cut-Off Factor
1.09 in
Dimensions
1.98 in L
End Gender 1
Female
End Size 1
1/4 in
Finish
Zinc-Plated
Fitting Type
Hose Fitting
For Use With
3TR18CT, 3TR8, 3TR8N, 3TR7 and 3TR7N Series Hoses
Hex Size
0.563 x 0.688 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
1/4-18
Thread Type
NPSM

Product Questions & Answers (3)

Question by: Dean C on Aug 2, 2025, 6:00 AM
Will this fitting hold up in a hydraulic system that sees a lot of vibration?
Answer by: Customer Support on Aug 3, 2025, 3:20 PM
Dura-Kote plating provides excellent corrosion resistance, while the innovative design ensures both performance and maximum uptime, which should hold up well under normal operating conditions.
Question by: Danny C on Jan 11, 2026, 11:49 AM
trying to swap a fitting on a -4 hose, is this one set up for a 1/4 NPSM female end?
Answer by: Customer Support on Jan 12, 2026, 3:42 PM
It matches a -4 hose dash size and a 0.25 inch female NPSM end connection, so it lines up with assemblies needing that female NPSM interface.
Question by: Pete G on Jul 19, 2025, 4:36 PM
what's the corrosion protection like on this fitting? running it in a pretty wet environment and had issues with rust on other brands
Answer by: Customer Support on Jul 20, 2025, 6:45 PM
Carbon steel fittings can be hit or miss in wet conditions, but this one carries Dura-Kote plating specifically for corrosion resistance. It's built to hold up in demanding operational environments, so moisture exposure was clearly part of the design consideration. That plating is what separates it from bare steel options that tend to rust out faster.

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