Can the Bolt-on Quick Connector, Zinc-Plated Steel BSP Female Plug, HOLMBURY HS be safely used at working pressures up to 450 bar and temperatures from -25°C to +100°C?

Yes. The Bolt-on Quick Connector, Zinc-Plated Steel BSP Female Plug, HOLMBURY HS can be used at working pressures up to 450 bar and temperatures from -25°C to +100°C. It is manufactured from galvanized steel for corrosion resistance, has a working pressure capacity up to 450 bar (size-dependent) with a 4:1 safety factor, and uses NBR seals rated for the specified temperature range. Note that the plug may be screwed in under a maximum pressure of 50 bar—follow installation and size specifications to ensure safe operation.

Is the Bolt-on Quick Connector, Zinc-Plated Steel BSP Female Plug, HOLMBURY HS suitable for continuous operation under harsh, corrosive environments without additional protective coatings?

Bolt-on Quick Connector, Zinc-Plated Steel BSP Female Plug, HOLMBURY HS is made from galvanized (zinc-plated) steel and offers good corrosion resistance for demanding hydraulic applications. However, while the product description highlights durability and resistance to corrosion, zinc plating alone may not be sufficient for continuous operation in highly corrosive environments (e.g., salt spray, chemical exposure, marine atmospheres) over long periods. For such harsh conditions, additional protective measures — such as thicker coatings, stainless steel construction, specialized plating (e.g., nickel or passivation), or regular maintenance and inspection — are typically recommended to prevent accelerated corrosion and maintain sealing performance. In summary: the HOLMBURY HS is robust and corrosion-resistant for many challenging environments, but for continuous use in very aggressive corrosive conditions, additional protective coatings or alternative materials should be considered.

Bolt-on Quick Connector, Zinc-Plated Steel BSP Female Plug, HOLMBURY HS

All products, Hydraulic quick couplings/

Additional information

Material	CS – steel (cast iron)

The screw quick coupling plug type HS with internal BSP thread is a robust and reliable solution designed for demanding hydraulic applications. Manufactured from high-quality galvanized steel, it ensures excellent durability and resistance to corrosion, making it suitable for long-term use in challenging environments. The coupling can be safely screwed under a maximum pressure of 50 bar, while its working pressure capacity reaches up to 450 bar depending on the size, supported by a high safety factor of 4:1 for maximum operational security. Equipped with an NBR sealing system, it guarantees reliable tightness and performance across a wide temperature range from -25°C to +100°C, ensuring consistent efficiency even under extreme conditions. Optimized flow characteristics are engineered for a pressure drop of just 3 bar, allowing for smooth and efficient hydraulic oil transfer. This makes the HS quick coupling plug an ideal choice for professionals seeking a dependable, high-performance component that enhances system reliability, minimizes downtime, and supports the seamless operation of hydraulic power systems.

List of product variants

Article number	Product variant name	DN	BAR	Availability	Actions
HQ-HS06-M-04G	HS 1/4" screw connector, 1/4" BSP female thread, nitrile seal	-	450	In stock	Enquiry
HQ-HS10-M-06G	HS 3/8" screw connector, 3/8" BSP female thread, nitrile seal	-	450	In stock	Enquiry
HQ-HS12-M-06G	HS 1/2" screw connector, 3/8" BSP female thread, nitrile seal	-	400	In stock	Enquiry
HQ-HS12-M-08G	HS 1/2" screw connector, 1/2" BSP female thread, nitrile seal	-	400	In stock	Enquiry
HQ-HS19-M-12G	HS 3/4" screw connector, 3/4" BSP female thread, nitrile seal	-	400	In stock	Enquiry
HQ-HS25-M-16G	HS 1" screw connector, 1" BSP thread, nitrile seal	-	300	In stock	Enquiry
HQ-HS32-M-20G	HS 1.1/4" screw connector, 1.1/4" BSP female thread, nitrile seal	-	300	In stock	Enquiry

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The screw quick coupling plug type HS with internal BSP thread is a robust and reliable solution designed for demanding hydraulic applications. Manufactured from high-quality galvanized steel, it ensures excellent durability and resistance to corrosion, making it suitable for long-term use in challenging environments. The coupling can be safely screwed under a maximum pressure of 50 bar, while its working pressure capacity reaches up to 450 bar depending on the size, supported by a high safety factor of 4:1 for maximum operational security. Equipped with an NBR sealing system, it guarantees reliable tightness and performance across a wide temperature range from -25°C to +100°C, ensuring consistent efficiency even under extreme conditions. Optimized flow characteristics are engineered for a pressure drop of just 3 bar, allowing for smooth and efficient hydraulic oil transfer. This makes the HS quick coupling plug an ideal choice for professionals seeking a dependable, high-performance component that enhances system reliability, minimizes downtime, and supports the seamless operation of hydraulic power systems.