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Threaded plug for Allen key UNF AGJ 1/2" JIC

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Manufacturer: HYDRON hydraulika siłowa (go to products)

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Threaded plug for Allen key UNF AGJ 1/2" JIC

The threaded plug for Allen key UNF AGJ 1/2" JIC is a steel hydraulic blanking plug designed for closing appropriately matched holes and connections with an internal UNF thread. It is equipped with a 1/2" external thread and a hexagonal socket for an Allen key. The product can be used for blanking compatible connections in pumps, hydraulic directional control valves, and hose ends.

The plug is made of free-cutting steel protected by zinc plating with white passivation. The declared working pressure is 450 bar, and the operating temperature range is from -20°C to +120°C. The product is available under the catalog designation Cast 207502 and is also referred to as a blanking screw with a hexagon socket, with a UNF/UN-2A thread.

Technical parameters of the UNF AGJ 1/2" JIC plug

Product type: threaded plug, hydraulic blanking plug.
Nominal thread size: 1/2".
Thread type: external UNF/UN-2A.
External thread diameter provided on the card: 12.4–12.7 mm.
Internal thread diameter provided on the card: 11.3–11.6 mm.
Socket type: hexagonal for Allen key.
Working pressure: 450 bar.
Operating temperature: from -20°C to +120°C.
Material: free-cutting steel.
Surface protection: zinc plating with white passivation.
Designation according to Cast: 207502.
Purpose: blanking compatible threaded holes.
Example application: pumps, hydraulic directional control valves, and appropriate hose ends.
English name: Closure plug with hexagon socket head - thread UNF/UN-2A.

Application of the UNF AGJ 1/2" plug in power hydraulics

The UNF AGJ 1/2" JIC plug is designed for closing appropriately matched holes with an internal thread. It can be used during installation assembly, replacement of hydraulic components, maintenance work, and securing unused connections.

Example applications include threaded holes in the bodies of pumps and hydraulic directional control valves as well as compatible hose ends. Before installation, thread compatibility and sealing method must be confirmed, as not every port with a UNF thread is designed for the same type of blanking plug.

External thread UNF 1/2" – identification

The plug has an external inch UNF thread with a nominal size of 1/2". The product card provides an external diameter range of 12.4–12.7 mm and an internal diameter range of 11.3–11.6 mm. These dimensions can be helpful when identifying the thread with a caliper.

During identification, not only the diameter but also the thread pitch should be checked using an appropriate inch thread gauge. Compatibility of the mating surfaces and the design of the port being blanked is also important.

Allen socket – mounting the blanking plug

The plug is equipped with an internal hexagonal socket, which allows for tightening and loosening using an appropriately selected Allen key. This design facilitates the maintenance of connections located in places with limited access.

During installation, use a key matched to the socket dimension. An incorrect tool can damage the hexagon and make later disassembly difficult. The tightening method should correspond to the requirements of the specific hydraulic connection.

Working pressure 450 bar

For the threaded plug UNF AGJ 1/2" JIC, a working pressure of 450 bar is specified. This parameter must be taken into account when selecting a plug for a hydraulic system, especially if the closed connection will remain under pressure during device operation.

The permissible pressure of a complete connection also depends on the parameters of the port and other installation elements. Before use, it must be confirmed that all mating elements are suitable for the required operating conditions.

Operating temperature from -20°C to +120°C

The operating temperature range declared for the product is from -20°C to +120°C. When selecting the plug, the temperature of the hydraulic medium and the ambient conditions in which the device operates should be considered.

The temperature range of the plug itself does not replace checking the permissible parameters of the entire connection, including the sealing method used.

Free-cutting steel and zinc plating with white passivation

The plug is made of free-cutting steel. Its surface has been coated with zinc plating with white passivation, providing anti-corrosion protection for the steel element.

During selection, the operating environment, properties of the working medium, and material requirements of the specific installation should be considered. The galvanic coating does not mean that the product is made of stainless steel.

Catalog designation Cast 207502

The HYDRON product card provides the designation according to Cast: 207502. This number facilitates the identification of the plug when comparing technical documentation, ordering parts, and searching for components with the correct design.

When looking for a replacement, confirm the compatibility of the thread, dimensions, sealing method, and operating parameters. Designations from other manufacturers require separate catalog verification.

UNF, AGJ, and JIC – what to look for when choosing?

UNF specifies a fine-pitch inch thread, while AGJ and JIC appear in the nomenclature of inch hydraulic connections. When selecting a plug, the actual design of the element is important, not just the name of the connection system used.

A threaded plug with an Allen socket does not necessarily have the same sealing surface as a classic JIC fitting with a 37° cone. Before installation, check if the plug is intended for the specific hole and sealing method.

How to choose a UNF AGJ 1/2" JIC plug?

The basis for a correct choice is identifying the internal thread of the connection being blanked. Check the 1/2" size, UNF thread system compatibility, hole design, and tightness requirements.

Additionally, consider the working pressure of 450 bar, the temperature from -20°C to +120°C, and the available installation space. When replacing a plug, comparing the Cast 207502 designation with the documentation of the component being used will be helpful.

Installation and leak control of the plug

Before starting installation, turn off the device and safely depressurize the hydraulic system. Then clean the threaded hole, inspect the condition of the plug thread, and check the mating surfaces.

The plug should be screwed into a compatible hole and tightened with an appropriate Allen key, according to the requirements of the given connection system. After installation, check the correctness of the fastening and tightness under safe conditions.

Technical specification

Parameter	Value
Product name	Threaded plug for Allen key UNF AGJ 1/2" JIC
Product type	Plug / hydraulic blanking plug
Thread	External 1/2" UNF/UN-2A
External thread diameter	12.4–12.7 mm
Internal thread diameter	11.3–11.6 mm
Working pressure	450 bar
Operating temperature	From -20°C to +120°C
Material	Free-cutting steel
Surface protection	Zinc plating with white passivation
Socket	Hexagonal for Allen key
Cast designation	207502
Purpose	Blanking compatible threaded holes

Frequently Asked Questions (FAQ)

What thread does the UNF AGJ 1/2" JIC plug have?

The plug has an external 1/2" thread in the UNF/UN-2A system. The product card specifies an external thread diameter of 12.4–12.7 mm.

What is the working pressure of the plug?

The working pressure specified for this variant is 450 bar. When choosing, also consider the parameters of the mating connection.

What key is used to mount the blanking plug?

The plug has a hexagonal socket designed for mounting with an Allen key. The key size should be selected according to the actual dimension of the socket.

What is the Cast designation for this plug?

The HYDRON product card provides the Cast 207502 designation.

What material is the plug made of?

The product is made of free-cutting steel protected by zinc plating with white passivation.

Does the plug fit every 1/2" JIC connection?

No. Before installation, check the compatibility of the thread and the design of the sealing surfaces. The nominal size alone does not confirm the compatibility of every connection.