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Plastic threaded plug / cap 1.7/16" UNF

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Manufacturer: HYDRON hydraulika siłowa (go to products)

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from €3.64 - GLS Courier (Poland)

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Plastic threaded plug / cap male thread 1.7/16" UNF

The plastic threaded plug male thread 1.7/16" UNF is a protective cap with an external inch thread, designed for the temporary closing of compatible holes and hydraulic connections. Made of plastic, the product helps protect hoses, control valves, cylinders, and other components from dust, dirt, shavings, and contamination during transport, storage, assembly, and repairs.

The plug with a thread size of 1 7/16" is designed to protect connections when a system component has been disconnected or prepared for storage. The threaded mounting allows the plug to be placed in a properly fitted hole, limiting the access of contaminants to its interior.

Important: the plastic plug GZ 1.7/16" UNF does not carry pressure loads. It is not intended for closing hydraulic or pneumatic systems operating under pressure.

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

Technical parameters of the 1.7/16" UNF plastic plug

Product type: protective cap, threaded plastic plug.
Thread type: GZ – external (male).
Nominal thread size: 1 7/16".
Trade designation: 1.7/16" UNF.
Thread type: inch, unified.
Standard hydraulic thread in size 1 7/16": 1 7/16"-12 UN.
Standard number of threads: 12 TPI.
Nominal thread diameter: approximately 36.51 mm.
Material: plastic.
Purpose: temporary protection of connections and threaded holes.
Pressure operation: unacceptable – the product does not carry pressure loads.
Color: various colors, packed randomly.
Application: protection of hoses, control valves, cylinders, and other components.

Application of the male thread plug 1 7/16" in power hydraulics

The plastic plug with a 1 7/16" male thread is used for the temporary protection of hydraulic holes and connections. It can be used during hose replacement, machine repairs, equipment maintenance, and preparing components for transport.

The plug can be used in compatible connections of hydraulic control valves, cylinders, and hose ends having the appropriate internal thread. Its task is to protect the interior of parts from contamination, not to provide pressure sealing.

1 7/16" UNF thread – dimensions and identification

The designation 1.7/16" corresponds to the size of one and seven-sixteenths of an inch, which is a nominal diameter of approximately 36.51 mm. In standard hydraulic connections of this size, a 1 7/16"-12 UN thread is found, having 12 threads per inch.

In trade nomenclature, hydraulic threads may be described as UNF, however, the 1 7/16"-12 UN notation specifies the diameter and the number of threads. Before assembly, confirm the actual thread pitch of the plastic plug and its compatibility with the thread of the protected hole.

A caliper and an inch thread gauge can be used for identification. Compliance with the nominal diameter alone is not enough if the threads differ in pitch or design.

Protection of connections against dust and contamination

During repairs and the disconnection of hydraulic systems, open hoses and connections are exposed to contact with dust, sand, dirt, and metal shavings. The 1.7/16" plastic plug allows for temporarily closing a compatible hole, helping to limit the access of contaminants to the interior of the component.

Maintaining the cleanliness of hydraulic components is important for the proper operation of the installation. Contaminants can accelerate the wear of pumps, valves, control valves, and sealing elements.

1 7/16" plastic plug for transport and storage

The GZ 1.7/16" UNF protective plug can be used during the storage and transport of hydraulic parts. Temporary closure of the threaded hole helps limit internal contact with dust and accidental entry of foreign bodies.

The product works well in repair workshops, warehouses, and during the preparation of parts for shipment. Before restarting the device, remove the protective plug and make the target hydraulic connection.

Plastic protective plug vs. pressure plug

The GZ 1 7/16" plug is a component intended for the temporary protection of connections against dirt. It does not carry pressure loads and cannot replace a steel hydraulic plug intended for operation in a pressurized system.

If a connection is to remain closed during normal machine operation, a suitable pressure plug with confirmed strength parameters and the correct sealing method must be used. A compatible thread size alone does not mean the two solutions are interchangeable.

How to choose a 1.7/16" UNF male thread plastic plug?

Before purchasing, check if the hole to be protected has an internal thread compatible with the 1 7/16" external thread of the plug. It is important to confirm the diameter and pitch, as well as the condition of the thread surface.

In standard hydraulic connections, this size occurs with a 1 7/16"-12 UN thread. However, compare the markings and the actual execution of the plug with the requirements of the given connection.

Assembly and disassembly of the plastic plug

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

The plug should be screwed in carefully, without using excessive force. In case of clear resistance, stop the assembly and check the thread fit. Before starting the system, the plastic plug must be removed and the proper working connection made.

Various colors – random packing

GZ 1.7/16" UNF plastic plugs are available in various colors. Color variants are packed and shipped randomly, so the received plug may have a different color than the one shown in the product photograph.

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

Technical specification

Parameter	Value
Product name	Plastic threaded plug / cap male thread 1.7/16" UNF
Product type	Protective cap, plastic plug
Thread type	External, inch
Nominal size	1 7/16"
Standard hydraulic thread of this size	1 7/16"-12 UN
Standard pitch	12 threads per inch
Nominal diameter	Approximately 36.51 mm
Material	Plastic
Pressure operation	Not intended for carrying pressure loads
Color	Various colors, packed randomly
Application	Temporary protection of hydraulic connections against dirt

Frequently Asked Questions (FAQ)

What thread does the GZ 1.7/16" UNF plug have?

The plug has an external inch thread with a size of 1 7/16". The standard hydraulic thread in this size is 1 7/16"-12 UN, but the actual pitch of a specific plug should be confirmed before assembly.

Does the 1 7/16" plastic plug withstand hydraulic pressure?

No. The product does not carry pressure loads and cannot be used to close a system operating under pressure.

What is the 1.7/16" plastic plug used for?

It is used for the temporary protection of hoses, control valves, cylinders, and other components from dirt during transport, storage, assembly, and repairs.

Can the color of the plug be chosen?

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

Is 1 7/16"-12 UN the same as UNF?

These are not identical technical designations. In trade, threads of this type are sometimes referred to as UNF, while the standard 1 7/16"-12 hydraulic thread is designated as UN.

Can a plastic plug replace a hydraulic pressure plug?

No. The plastic plug is intended for protection against dirt and does not provide closure for a pressurized system. For such applications, a proper pressure plug should be selected.