Is the QC-LOK® QC4 Stainless Steel Quick Connector Socket with Male Thread compatible with standard Instrumentation Standard couplings and interchangeable with other manufacturers?

Yes. The QC-LOK® QC4 Stainless Steel Quick Connector Socket with Male Thread is designed in compliance with the Instrumentation Standard and is fully interchangeable with other Instrumentation Standard quick couplings. It features an integrated valve, is offered with external NPT, BSPT, or BSP threads, and is manufactured from AISI 316 stainless steel. Each coupling is factory-tested at 68 bar, supports a working pressure up to 206 bar, and uses Viton seals for reliable operation from -26°C to +204°C. These specifications ensure compatibility with standard Instrumentation Standard couplings and interchangeability with other manufacturers’ equivalent fittings.

Can the QC-LOK® QC4 Stainless Steel Quick Connector Socket with Male Thread maintain leak-free performance at its factory-tested 68 bar in long-term cyclic pressure applications?

Yes. The QC-LOK® QC4 Stainless Steel Quick Connector Socket with Male Thread is designed and factory-tested to provide leak-free performance at 68 bar and to sustain long-term cyclic pressure use. Key reasons: - Factory-tested to 68 bar for absolute tightness, ensuring each unit meets leak-free standards before delivery. - Constructed from AISI 316 stainless steel for excellent corrosion and fatigue resistance under repeated pressure cycles. - Robust design rated for a working pressure up to 206 bar, giving ample margin above the 68 bar test level. - Integrated valve and Viton sealing provide reliable sealing performance across a wide temperature range (-26°C to +204°C), maintaining seal integrity during thermal and pressure cycling. - Engineered to Instrumentation Standard and fully interchangeable with similar couplings, indicating consistent manufacturing tolerances and proven field reliability in demanding industries (aviation, gas, medical, pharma, labs). For best long-term cyclic performance, ensure correct installation, compatible mating components, periodic inspection, and adherence to operating temperature and media compatibility guidelines.

QC-LOK® QC4 Stainless Steel Quick Connector Socket with Male Thread

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Additional information

Material	SS – stainless steel

The QC4 quick coupling socket is a precision-engineered solution designed in compliance with the Instrumentation Standard, equipped with an integrated valve and available with external NPT, BSPT, or BSP threads. Manufactured from durable AISI 316 stainless steel, it ensures exceptional resistance to corrosion and demanding operating conditions, making it ideal for use in aviation, gas industry, medical technology, pharmaceutical production, and laboratory environments. Each coupling undergoes rigorous factory testing at 68 bar to guarantee absolute tightness, while its robust construction supports a working pressure of up to 206 bar. With a wide operating temperature range from -26°C to +204°C and reliable viton sealing, the QC4 delivers consistent performance even in extreme applications. Fully interchangeable with other Instrumentation Standard quick couplings, it offers maximum flexibility, safety, and efficiency for critical processes where reliability and precision are essential.

List of product variants

Article number	Product variant name	DN	BAR	Availability	Actions
HM-QC4-B-MG-02-SS	QC4 quick coupling socket, GZ 1/8" BSP, SS	-	206	In stock	Enquiry
HM-QC4-B-MG-04-SS	QC4 quick coupling socket, GZ 1/4" BSP, SS	-	206	In stock	Enquiry
HM-QC4-B-MN-02-SS	QC4 quick coupling socket, GZ 1/8" NPT, SS	-	206	In stock	Enquiry
HM-QC4-B-MN-04-SS	QC4 quick coupling socket, GZ 1/4" NPT, SS	-	206	In stock	Enquiry
HM-QC4-B-MR-02-SS	QC4 quick connector socket, GZ 1/8" BSPT, SS	-	206	In stock	Enquiry
HM-QC4-B-MR-04-SS	QC4 quick coupling socket, GZ 1/4" BSPT, SS	-	206	In stock	Enquiry

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The QC4 quick coupling socket is a precision-engineered solution designed in compliance with the Instrumentation Standard, equipped with an integrated valve and available with external NPT, BSPT, or BSP threads. Manufactured from durable AISI 316 stainless steel, it ensures exceptional resistance to corrosion and demanding operating conditions, making it ideal for use in aviation, gas industry, medical technology, pharmaceutical production, and laboratory environments. Each coupling undergoes rigorous factory testing at 68 bar to guarantee absolute tightness, while its robust construction supports a working pressure of up to 206 bar. With a wide operating temperature range from -26°C to +204°C and reliable viton sealing, the QC4 delivers consistent performance even in extreme applications. Fully interchangeable with other Instrumentation Standard quick couplings, it offers maximum flexibility, safety, and efficiency for critical processes where reliability and precision are essential.