Reduced double screw M-M from 3/4" to 1/2" in anti-corrosion brass – DVGW – code: 7245E*D – Maestrini

Reduced double M-M screw Maestrini in corrosion-resistant brass

The reduced double screw M-M Maestrini is a threaded fitting designed to create a direct connection between two components with female threading of different sizes. In this configuration, the reduction is from 3/4″ to 1/2″, a practical solution when you need to adapt an existing line, replace a component, or integrate accessories with non-uniform fittings.

Made of anticorrosion brass, it is suitable for use in hydraulic and technical fields, including contexts where long-term resistance and connection reliability are important requirements. The product is identified by the Maestrini code 7245E*D; the indication is also reported in the name DVGW.

Features and construction details

This reduced double screw is designed to offer a simple and immediate interface between two female threads, reducing the need for multiple adapters and helping to keep the connection line neat.

Configuration and function

• Type: reduced double screw M-M (male-male).
• Reduction: from 3/4″ to 1/2″.
• Function: connection between two elements with female thread of different sizes, for adaptations and connection conversions.

Material

• Material: anticorrosion brass.
• Usage setting: suitable for installations and maintenance where a robust and practical metal fitting is desired.

Product identification

• Brand / supplier: Maestrini.
• Supplier product code: 7245E*D.
• Indication in denomination: DVGW (as stated in the product title).

Typical applications

The reduced double M-M screw is commonly used when it is necessary to switch from one connection size to another without redesigning the entire system section. It is a useful choice both in new installations and in interventions on existing lines, where components with different threads are often encountered.

Hydraulic systems and fittings

• Adaptation between components with female connections not matching.
• Replacement of elements with different measurements compared to the original line.
• Maintenance and restoration interventions on technical systems.

Marine and onboard systems

In the nautical and onboard plant engineering context, this type of fitting is often chosen for its practicality in maintenance operations and for the possibility of quickly managing threaded reductions during the installation or upgrade of components.

• Ordinary and extraordinary maintenance on onboard technical lines.
• Quick adaptations in the presence of components with different connection standards.
• Reordering of existing lines with a reduction in the number of fittings and adapters.

Usage and installation notes

To achieve a correct connection, it is important to verify that the measurements of the female threads to be connected correspond to the planned reduction (3/4″ ↔ 1/2″) and that the type of threading is consistent with the system components. During assembly, operate carefully to avoid damage to the threads and ensure a clean coupling.

Good practices

• Preliminary check: check the size and compatibility of the threads of the components to be connected.
• Neat installation: keep surfaces clean and free of residues that could compromise the coupling.
• Choice of the correct component: refer to the code 7245E*D for reorders and replacements.

FAQ – Frequently Asked Questions

What is a reduced double-ended M-M screw for?

It serves to directly connect two components with female threading of different sizes, thanks to a male-male fitting that creates the reduction between the two connections.

What sizes does this Maestrini model cover?

This reduced double screw M-M is in the 3/4″ to 1/2″ configuration, as indicated in the product name.

What material is the reduced double screw made of?

It is made of corrosion-resistant brass, a common choice for fittings and components intended for hydraulic systems and technical applications.

What is the product code for reordering?

The supplier product code is 7245E*D. It is the recommended reference for replacement or reorder requests.