What is the maximum operating pressure for the Quad Coupling K, Carbon Steel, Zn-Ni Coated in each strength class (LL, L, S)?

Quad Coupling K, Carbon Steel, Zn-Ni Coated — Maximum Operating Pressure by Strength Class: - LL (very light series): up to 250 bar - L (light series): up to 420 bar - S (heavy series): up to 630 bar

How does the 24° DIN 2353 socket and external metric thread design of the Quad Coupling K, Carbon Steel, Zn-Ni Coated affect installation compatibility with standard hydraulic tubing and adapters?

The 24° DIN 2353 socket with external metric threads on the Quad Coupling K, Carbon Steel, Zn‑Ni Coated Format ensures broad compatibility with standard DIN 2353 hydraulic tubing and adapters. The 24° cone sealing geometry is the industry standard for steel tube fittings, so the coupling will mate precisely with matching female 24° sockets and metric-threaded ports used across hydraulic systems, providing metal‑to‑metal sealing when properly tightened. External metric threads follow common thread sizes and pitches specified by DIN 2353, simplifying direct connection to standard adapters, elbows, and manifolds without need for special reducers. The availability in three strength classes (LL, L, S) lets you choose a version matched to your system’s pressure rating and wall thickness of tubing, reducing mismatch risk and ensuring mechanical integrity. Carbon steel construction gives the coupling the required strength for typical hydraulic pressures, while the 6–10 µm zinc‑nickel coating provides excellent corrosion protection (up to ~720 h salt spray), preserving thread and sealing surfaces for long service life and reliable installation in harsh environments. In short: the 24° DIN 2353 socket plus external metric threads make the Quad Coupling K directly compatible with standard DIN‑conforming tubing and adapters, and its material/finish and strength-class options help ensure secure, durable, pressure‑appropriate connections.

Quad Coupling K, Carbon Steel, Zn-Ni Coated

Additional information

Material	CS – steel (cast iron)

The DIN 2353 four-way fitting, type K, is a precision-engineered component designed for reliable and leak-free hydraulic connections. Featuring a 24° DIN 2353 socket with external metric threads, it is available in three strength classes: LL (very light series), L (light series), and S (heavy series), ensuring optimal adaptability to diverse pressure ranges and system requirements. Manufactured from high-quality carbon steel and finished with an advanced zinc-nickel coating of 6–10 µm thickness, the fitting delivers exceptional durability and long-term performance. Its superior surface treatment provides outstanding resistance to corrosion, with proven protection of up to 720 hours in salt spray testing, making it an excellent choice for demanding industrial environments. Engineered for precision, safety, and longevity, this fitting guarantees secure connections even under challenging operating conditions, offering a dependable solution for hydraulic systems in sectors such as manufacturing, construction, and heavy machinery.

List of product variants

Article number	Product variant name	DN	BAR	Availability	Actions
HD-K-04LL-CN	DIN 2353 fitting K 4LL, Zn-Ni	-	100	In stock	Enquiry
HD-K-06L-CN	DIN 2353 fitting K 6L, Zn-Ni	-	315	In stock	Enquiry
HD-K-06LL-CN	DIN 2353 fitting K 6LL, Zn-Ni	-	100	In stock	Enquiry
HD-K-06S-CN	DIN 2353 fitting K 6S, Zn-Ni	-	630	In stock	Enquiry
HD-K-08L-CN	DIN 2353 fitting K 8L, Zn-Ni	-	315	In stock	Enquiry
HD-K-08LL-CN	DIN 2353 fitting K 8LL, Zn-Ni	-	100	In stock	Enquiry
HD-K-08S-CN	DIN 2353 fitting K 8S, Zn-Ni	-	630	In stock	Enquiry
HD-K-10L-CN	DIN 2353 fitting K 10L, Zn-Ni	-	315	In stock	Enquiry
HD-K-10S-CN	DIN 2353 fitting K 10S, Zn-Ni	-	630	In stock	Enquiry
HD-K-12L-CN	DIN 2353 fitting K 12L, Zn-Ni	-	315	In stock	Enquiry
HD-K-12S-CN	DIN 2353 fitting K 12S, Zn-Ni	-	630	In stock	Enquiry
HD-K-14S-CN	DIN 2353 fitting K 14S, Zn-Ni	-	630	In stock	Enquiry
HD-K-15L-CN	DIN 2353 fitting K 15L, Zn-Ni	-	315	In stock	Enquiry
HD-K-16S-CN	DIN 2353 fitting K 16S, Zn-Ni	-	400	In stock	Enquiry
HD-K-18L-CN	DIN 2353 fitting K 18L, Zn-Ni	-	315	In stock	Enquiry
HD-K-20S-CN	DIN 2353 fitting K 20S, Zn-Ni	-	400	In stock	Enquiry
HD-K-22L-CN	DIN 2353 fitting K 22L, Zn-Ni	-	160	In stock	Enquiry
HD-K-25S-CN	DIN 2353 fitting K 25S, Zn-Ni	-	400	In stock	Enquiry
HD-K-28L-CN	DIN 2353 fitting K 28L, Zn-Ni	-	160	In stock	Enquiry
HD-K-30S-CN	DIN 2353 fitting K 30S, Zn-Ni	-	400	In stock	Enquiry
HD-K-35L-CN	DIN 2353 fitting K 35L, Zn-Ni	-	160	In stock	Enquiry
HD-K-38S-CN	DIN 2353 fitting K 38S, Zn-Ni	-	315	In stock	Enquiry
HD-K-42L-CN	DIN 2353 fitting K 42L, Zn-Ni	-	160	In stock	Enquiry

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The DIN 2353 four-way fitting, type K, is a precision-engineered component designed for reliable and leak-free hydraulic connections. Featuring a 24° DIN 2353 socket with external metric threads, it is available in three strength classes: LL (very light series), L (light series), and S (heavy series), ensuring optimal adaptability to diverse pressure ranges and system requirements. Manufactured from high-quality carbon steel and finished with an advanced zinc-nickel coating of 6–10 µm thickness, the fitting delivers exceptional durability and long-term performance. Its superior surface treatment provides outstanding resistance to corrosion, with proven protection of up to 720 hours in salt spray testing, making it an excellent choice for demanding industrial environments. Engineered for precision, safety, and longevity, this fitting guarantees secure connections even under challenging operating conditions, offering a dependable solution for hydraulic systems in sectors such as manufacturing, construction, and heavy machinery.