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Plastic threaded plug / cap M30x2 Male Thread

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Manufacturer: HYDRON hydraulika siłowa (go to products)

Shipping time: 24 hours

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from €3.64 - GLS Courier (Poland)

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M30x2 plastic threaded plug / cap

The M30x2 plastic threaded plug is a protective cap designed for the temporary closing of holes and hydraulic connections equipped with a compatible M30x2 female thread. The product is made of plastic and helps protect hydraulic hoses, manifolds, cylinders, valves, and other components from dust, dirt, metal shavings, and contamination during repair, transport, storage, and assembly.

The M30x2 plastic plug features a metric male thread with a nominal diameter of 30 mm and a pitch of 2 mm. It allows for the temporary protection of a correctly matched hole until the final hydraulic connection is made. It is useful when replacing hoses, servicing machines, and preparing components for storage or shipping.

Important: the M30x2 plastic plug does not withstand pressure loads. It must not be used to seal hydraulic or pneumatic systems operating under pressure.

Color information: plugs are available in various colors, which are packed and shipped randomly. The color of the received product may differ from the one shown in the photo.

Technical parameters of the M30x2 plastic plug

Product type: protective plug, plastic threaded cap.
Connection type: male thread (MT).
Thread size: M30x2.
Thread system: ISO metric.
Nominal thread diameter: 30 mm.
Thread pitch: 2 mm.
Standard metric thread profile angle: 60°.
Material: plastic.
Intended use: temporary protection of threaded connections and holes.
Operation under pressure: not allowed – the product does not withstand pressure loads.
Color: various colors, packed randomly.
Application: protecting hoses, manifolds, cylinders, and other hydraulic components.

Use of the M30x2 protective plug in power hydraulics

The M30x2 plastic threaded plug is used for the temporary protection of hydraulic connections during service work, hose replacement, technical inspections, and machine maintenance. It can be used in compatible ports of manifolds, cylinders, valves, and other components equipped with an M30x2 female thread.

The plug helps limit the ingress of contamination into the component when a hose is disconnected or the device is being prepared for repair. The product serves a protective function and is not intended for sealing systems during operation.

M30x2 metric thread – dimensions and identification

The M30x2 designation specifies a metric thread with a nominal diameter of 30 mm and a pitch of 2 mm. It is a triangular profile thread with a standard 60° angle. In the case of the M30x2 protective plug, the male thread is intended to work with a properly matched female thread.

The M30x2 thread should be distinguished from other metric threads with a similar diameter but a different pitch. For example, an M30x1,5 thread is not directly interchangeable with M30x2. Both parameters should be checked before assembly, as attempting to screw in an incompatible plug may damage the plastic thread.

A caliper and a metric thread gauge can be used to identify the connection. It is also worth checking the condition of the threaded surface and the possibility of correct plug seating.

Protection of hydraulic hoses against contamination

When dismantling hydraulic systems, open hoses and connections are exposed to contact with dust, sand, dirt, and metal shavings. The M30x2 plastic plug allows for the temporary closing of a compatible hole, helping to limit the ingress of dirt into the component.

Maintaining the cleanliness of hoses and components is important for the correct operation of power hydraulics. Contaminants entering the hydraulic oil can accelerate the wear of pumps, manifolds, valves, and seals. Using protective plugs during repair and storage helps mitigate this risk.

M30x2 plug for transport and storage

The M30x2 plastic plug is useful during the transportation and storage of hydraulic parts. Temporarily closing a threaded hole helps protect its interior from dust and accidental ingress of foreign bodies.

The product can be used in power hydraulics workshops, spare parts warehouses, and during the preparation of components for shipment. The plug provides protection while the element is not connected to an operating system.

Plastic – construction of the protective plug

The M30x2 plug is made of plastic. Its primary task is to protect threaded holes from contamination during transport, storage, assembly, and service work.

The plastic construction is not intended to withstand pressure loads. Avoid over-tightening during installation, as this could damage the thread or deform the plug body.

M30x2 plastic plug vs. pressure hydraulic plug

The M30x2 plastic plug serves a protective function and is used for the temporary protection of threaded holes. It is not designed to maintain operating pressure and cannot replace a properly selected pressure hydraulic plug.

If the connection is to remain closed during machine operation, a hydraulic plug with confirmed operating parameters, the correct thread, and the proper sealing method must be used. Matching the M30x2 thread alone does not mean the plastic plug can operate under pressure.

How to choose the M30x2 plastic plug?

Before purchasing, ensure that the hole being protected has a compatible M30x2 female thread. The primary selection parameters are the nominal diameter of 30 mm and the pitch of 2 mm. The condition of the thread and available assembly space should also be checked.

In the case of hydraulic connections, their design must also be taken into account. Thread compatibility allows for the selection of a protective plug, but it does not confirm the leak-tightness of the connection or resistance to operating pressure.

Assembly and disassembly of the M30x2 plastic plug

Before assembly, turn off the device, safely depressurize the system, and clean the threaded hole. Then, check the compatibility of the plug thread with the connection being protected.

The plug should be screwed in carefully, without using excessive force. If significant resistance occurs during assembly, stop screwing and recheck the thread fit. Before starting the system, the plastic plug must be removed and the final hydraulic connection made.

Various colors – random packing

M30x2 plastic plugs are available in various colors. Color variants are packed and shipped randomly, so the color of the product received may differ from the one shown in the photo.

Color is not a primary criterion for technical selection. The most important factors are M30x2 thread compatibility and the protective purpose of the plug.

Technical specification

Parameter	Value
Product name	M30x2 plastic threaded plug / cap
Product type	Protective plug, plastic cap
Connection type	Male thread (MT)
Thread size	M30x2
Thread system	ISO Metric
Nominal thread diameter	30 mm
Thread pitch	2 mm
Standard metric thread profile angle	60°
Material	Plastic
Pressure operation	Not allowed
Color	Various colors, packed randomly
Application	Temporary protection of hydraulic connections against contamination

Frequently Asked Questions (FAQ)

What thread does the M30x2 plastic plug have?

The plug has an M30x2 metric male thread with a nominal diameter of 30 mm and a pitch of 2 mm. It is intended for the temporary protection of compatible holes with a female thread.

Does the M30x2 plastic plug withstand hydraulic pressure?

No. The product does not withstand pressure loads and cannot be used to close an operating hydraulic system.

What is the M30x2 plastic plug used for?

It is used for the temporary protection of hoses, manifolds, cylinders, and other components from contamination during repair, transport, storage, and assembly.

Are M30x2 and M30x1,5 threads interchangeable?

No. Both threads have the same nominal diameter of 30 mm, but they differ in pitch. The M30x2 thread has a 2 mm pitch, while the M30x1,5 has a 1,5 mm pitch. They should not be used interchangeably.

Can I choose the color of the plastic plug?

The product is available in various colors, which are packed and shipped randomly. The color of the delivered plug may differ from the one shown in the photo.

Can a plastic plug replace a steel hydraulic plug?

Not in a system operating under pressure. The plastic plug is only for protection against contamination. Properly selected pressure plugs must be used to close operating connections.