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Plastic threaded plug / cap Male 13/16" UNF

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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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Plastic threaded plug / cap Male 13/16" UNF

The plastic threaded cap Male 13/16" UNF is a protective plug designed for temporary closing of holes and hydraulic connections with a compatible internal thread. The product is made of plastic and has an external inch thread of 13/16". Its primary task is to protect hoses, manifolds, cylinders, and other components from dust, dirt, metal shavings, and contamination.

The 13/16" UNF plastic plug is used during machine repairs, hydraulic hose replacement, parts transport, and storage of installation elements. It allows for temporary protection of an open connection until the final hydraulic connection is made.

Important: the plastic Male 13/16" UNF cap does not handle pressure loads. It is not intended for closing hydraulic or pneumatic systems operating under pressure.

Color information: caps 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 13/16" UNF plastic cap

Product type: protective cap, threaded plastic plug.
Connection type: Male – external thread.
Nominal thread size: 13/16".
Thread system: inch, UNF trade designation.
Nominal thread diameter: approximately 20.64 mm.
Thread pitch: requires confirmation for a specific design.
Material: plastic.
Purpose: temporary protection of connections and threaded holes.
Pressure operation: not allowed.
Color: various colors, packed randomly.
Application: protecting hoses, manifolds, cylinders, and other hydraulic components.

Application of the 13/16" protective plug in power hydraulics

The plastic Male 13/16" UNF cap is used for temporary protection of open hydraulic connections during service work, hose replacement, and machine maintenance. It can be used in compatible ports of manifolds, cylinders, and other elements equipped with the appropriate internal thread.

The product is useful wherever there is a need to protect a connection from dirt after it has been disconnected from the system. The screw-in plug limits the possibility of accidental ingress of contaminants into the component.

Male 13/16" UNF thread – dimensions and identification

The 13/16" designation refers to a nominal thread diameter of 20.6375 mm, which is approximately 20.64 mm. The product name uses the UNF designation, referring to the family of unified national fine inch threads.

When selecting a cap, it is important to check not only the diameter but also the number of threads per inch (TPI). The notation 13/16" UNF alone, without an additional pitch designation, does not allow for an unambiguous determination of the full thread parameters of a specific product.

A caliper and an inch thread gauge can be used to identify the thread. Make sure the external thread of the cap matches the internal thread of the protected connection.

Protection of hoses and connections against dirt

During hydraulic system repairs, open hoses and connections are exposed to contact with dust, dirt, sand, and metal shavings. The 13/16" UNF plastic cap allows for temporary closure of a compatible hole, helping to protect its interior from contamination.

Maintaining the cleanliness of components is important for the proper operation of power hydraulics. Solid particles entering the oil circuit can accelerate the wear of pumps, valves, manifolds, and seals.

Male 13/16" cap for transport and storage

The 13/16" UNF plastic plug is used during the transportation and storage of hydraulic parts. It enables temporary closure of a threaded hole, reducing the risk of dust and other foreign bodies entering the component.

The product can be used in hydraulic workshops, spare parts warehouses, and when preparing elements for shipment. The protective plug must be removed before restarting the installation.

Plastic – construction of the protective cap

The Male 13/16" UNF cap is made of plastic. Its task is to protect threaded holes during storage, transport, and service work.

The plastic construction is not adapted to handle pressure loads. During assembly, avoid overtightening, which may damage the thread or deform the plug body.

Protective cap vs. pressure hydraulic plug

The 13/16" UNF plastic plug serves a protective function and cannot replace a hydraulic cap designed for pressure operation. Its task is to protect an open connection from dirt, not to maintain the working pressure of the installation.

If the connection is to remain closed during device operation, an appropriately selected pressure plug with confirmed strength parameters and the correct sealing method must be used.

How to choose a plastic Male 13/16" UNF cap?

Before purchasing, make sure that the protected hole has a compatible internal thread with a nominal size of 13/16". It is necessary to check the diameter, number of threads per inch, and the condition of the thread.

The intended use of the product should also be considered. The cap is suitable for temporary protection of connections during transport, storage, and repairs, but cannot be used as a closure for an installation operating under pressure.

Assembly and disassembly of the 13/16" plastic plug

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

The plug should be screwed in carefully, without excessive force. If resistance occurs during assembly, stop screwing and recheck the thread fit. Before starting the installation, the plastic cap must be removed and the proper working connection must be made.

Various colors – random packing

Male 13/16" UNF plastic caps come in various colors. Color variants are packed and shipped randomly, so the color of the delivered plug may differ from the one shown in the product photograph.

The basic selection criterion is thread compatibility and the protective purpose of the cap. Color does not determine its compatibility with the hydraulic connection.

Technical specification

Parameter	Value
Product name	Plastic threaded plug / cap Male 13/16" UNF
Product type	Protective cap, plastic plug
Thread type	Male – external, inch
Nominal size	13/16"
Thread system	UNF – trade designation
Nominal thread diameter	About 20.64 mm
Thread pitch	To be confirmed for a specific design
Material	Plastic
Pressure operation	Not allowed
Color	Various colors, packed randomly
Application	Temporary protection of hydraulic connections against dirt

Frequently Asked Questions (FAQ)

What thread does the Male 13/16" UNF plastic cap have?

The cap has an external inch thread with a nominal size of 13/16", commercially designated as UNF. Before assembly, confirm its pitch and compatibility with the protected connection.

Does the 13/16" UNF plastic plug withstand hydraulic pressure?

No. The product does not handle pressure loads and cannot be used to close a working hydraulic system.

What is the Male 13/16" UNF plastic cap used for?

It is used for temporary protection of hoses, manifolds, cylinders, and other components against dirt during transport, storage, and repairs.

Can I choose the color of the cap?

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

Can a plastic cap replace a steel hydraulic plug?

Not in an installation operating under pressure. For such an application, a proper hydraulic plug with appropriate parameters and sealing method should be selected.