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Danfoss / Eaton Aeroquip 4-Wire Spiral TTC Fitting

Description & Features

The Eaton Aeroquip 4-Wire Spiral TTC Fitting is engineered for robust performance and maximum uptime. Featuring Dura-Kote plating, this fitting offers exceptional corrosion resistance, significantly extending the life of hose assemblies.

Constructed from high-quality carbon steel, it meets SAE J1176 certification standards. The fitting is designed with a metric female end for easy integration into various industrial environments.

With a hose dash size of -12, the system is optimized for efficient and reliable operation. This fitting is part of the Danfoss Power Solutions (II LLC Aeroquip) range, known for innovation and durability.

Supplier Part Number: 4S20DS12

Specifications

Brand Aeroquip® by Danfoss	a Dimensions 3.41 in	Compatible Hose ID 3/4 in	Connection Size 1 3/4 in	Connection Size 2 1-1/4 in	Connection Type Female DKOS Swivel, Hose	Connection Type 1 Hose	Connection Type 2 Female DKOS DIN 24 deg Seat Swivel	Construction Style Crimp	Cut-Off Factor 1.98 in	Dimension Standards SAE J1176	Dimensions 3.5 in L x 1.83 in W x 2.09 in H	End Gender 1 Female	End Size 1 20	Finish Dura-Kote™	Fitting Type Hose Fitting	For Use With H430, H430R, H525H, H471, H810L, H600, H464 and H850 Series Hoses	Hex Size 1.81 in	Hose Dash Size 12	Inside Diameter 0.56 in	Material Steel	Material Construction Carbon Steel	nmfc 50	Segment Code A	Series 4S Series	Thread Sealant Without Thread Sealant	Thread Size M36x2

Product Questions & Answers (5)

Question by: Harvey W on Mar 4, 2026, 6:42 AM

Will this fitting hold up in a hydraulic system running around 3000 PSI?

Answer by: Customer Support on Mar 6, 2026, 6:50 AM

Dura-Kote plating on this fitting provides superior corrosion resistance, and the system engineering extends hose assembly life, so it should perform well under pressure within expected hydraulic applications.

Question by: Warren H on Jun 29, 2025, 12:09 PM

got a -12 hose, is this the right dash size fitting or am i mixin stuff up

Answer by: Customer Support on Jul 1, 2025, 6:43 AM

For sizing, the key callout here is the hose dash size. This fitting is listed as a -12, so it matches a -12 hose size.

Question by: Patty H on Dec 28, 2025, 8:52 PM

does this fitting work with -12 hose on 4-wire spiral assemblies or is it only for certain builds

Answer by: Customer Support on Dec 30, 2025, 7:21 AM

Carbon steel construction and a -12 hose dash size make it a solid match for 4-wire spiral hose assemblies at that size. The Dura-Kote plating adds a layer of corrosion resistance that holds up well in demanding environments, so it's not just built for light-duty work.

Question by: Harvey W on Dec 14, 2025, 8:19 PM

Does the corrosion resistance on this fitting hold up when its exposed to moisture or harsh washdown conditions regular like?

Answer by: Customer Support on Dec 16, 2025, 2:48 PM

Dura-Kote plating is what sets this one apart from standard carbon steel fittings. That coating is specifically applied to fight off corrosion over time, which makes it a solid pick for environments where moisture, humidity, or general exposure to the elements is part of the daily reality. Carbon steel on its own would be more vulnerable, but the Dura-Kote finish gives it meaningful added protection and extends the working life of the whole hose assembly.

Question by: Bobby P on May 5, 2025, 4:16 PM

trying to match up a hose end here, is 4S20DS12 the one with the metric female end and a -12 hose dash size?

Answer by: Customer Support on May 6, 2025, 5:07 PM

For fit confirmation, 4S20DS12 is a fitting assembly with a metric female end (End Type 1: Metric, End Gender 1: female) and it is built for hose dash size -12.