Is the JIC Interlock Male UNF Straight End, Carbon Steel compatible with hose types 4SH, R13, and R15 for high-pressure hydraulic systems?

Yes. The JIC Interlock Male UNF Straight End, Carbon Steel is expressly designed for use with hose types 4SH, R13, and R15 in high-pressure hydraulic systems. Its 74° cone and precise interlock geometry provide a secure, leak‑free seal suitable for heavy-duty, high‑pressure applications. Constructed from robust carbon steel with a protective galvanization finish, the fitting offers strong mechanical performance and good corrosion/wear resistance, extending service life in demanding environments. It is therefore compatible and appropriate for high‑pressure hydraulic systems in sectors like construction, agriculture, mining, and heavy machinery.

Can the JIC Interlock Male UNF Straight End, Carbon Steel be used with different hydraulic fluids (e.g., biodegradable or phosphate ester) without affecting seal integrity?

JIC Interlock Male UNF Straight End, Carbon Steel Format: Generally compatible with many hydraulic fluids, but compatibility depends on seal material rather than the carbon steel body. The fitting’s robust carbon steel construction and galvanization resist corrosion from fluid exposure, and the 74° cone interlock provides a reliable metal-to-metal seal; however, most hydraulic systems rely on elastomer seals in hoses or adapters to ensure leak-free performance. - Mineral oils: Widely compatible with common NBR (nitrile) and HNBR seals used in hydraulic hoses (4SH, R13, R15). - Biodegradable fluids (esters, vegetable oils): May require seals made from FKM, HNBR, or specific polyesters depending on fluid chemistry; some biodegradable fluids can swell or degrade NBR. - Phosphate ester (fire-resistant) fluids: Aggressive toward many elastomers; typically require seals made from EPDM, FKM, or specially formulated materials and attention to compatibility with protective coatings. Recommendation: Verify the actual elastomer/material composition of the seals used in the hose assemblies and adapters. Consult hose and seal manufacturers’ compatibility charts for the specific fluid (biodegradable ester type or phosphate ester) before use. If seals are compatible, the JIC Interlock Male UNF Straight End, Carbon Steel Format itself will not compromise seal integrity.

JIC Interlock Male UNF Straight End, Carbon Steel

All products, Fittings for high-pressure hoses/

Additional information

Material	CS – steel (cast iron)

The Straight JIC INTERLOCK fitting with external UNF thread and a 74° cone is engineered for secure and durable connections in demanding hydraulic applications. Designed specifically for use with hose types 4SH, R13, and R15, it ensures maximum reliability under high pressure and heavy-duty conditions. Manufactured from robust carbon steel and finished with a protective galvanization layer, the fitting offers excellent resistance to corrosion and wear, extending service life even in harsh environments. Its precise interlock design guarantees a tight, leak-free seal, enhancing system safety and efficiency. Ideal for industries such as construction, agriculture, mining, and heavy machinery, this fitting combines strength, performance, and long-term durability, making it a trusted choice for professionals who require uncompromising quality in hydraulic systems.

List of product variants

Article number	Product variant name	DN	BAR	Availability	Actions
TI-ILJZ110-17-12	End. JIC INTERLOCK GZ 1.1/16", hose 3/4"	20	-	In stock	Enquiry
TI-ILJZ110-21-16	End. JIC INTERLOCK GZ 1.5/16", hose 1"	25	-	In stock	Enquiry
TI-ILJZ110-26-20	End. JIC INTERLOCK GZ 1.5/8", hose 1.1/4"	32	-	In stock	Enquiry
TI-ILJZ110-30-24	End. JIC INTERLOCK GZ 1.7/8", hose 1.1/2"	38	-	In stock	Enquiry
TI-ILJZ110-40-32	End. JIC INTERLOCK GZ 2.1/2", hose 2"	50	-	In stock	Enquiry

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The Straight JIC INTERLOCK fitting with external UNF thread and a 74° cone is engineered for secure and durable connections in demanding hydraulic applications. Designed specifically for use with hose types 4SH, R13, and R15, it ensures maximum reliability under high pressure and heavy-duty conditions. Manufactured from robust carbon steel and finished with a protective galvanization layer, the fitting offers excellent resistance to corrosion and wear, extending service life even in harsh environments. Its precise interlock design guarantees a tight, leak-free seal, enhancing system safety and efficiency. Ideal for industries such as construction, agriculture, mining, and heavy machinery, this fitting combines strength, performance, and long-term durability, making it a trusted choice for professionals who require uncompromising quality in hydraulic systems.