Rubber Hole Plugs
Rubber plugs-
also known as
rubber caps or
rubber hole plugs- are used in
a wide variety of applications. Rubber hole plugs are perfect to cover holes
in a variety of objects. Generally, these rubber plugs are used to seal
components, especially those containing chemicals and/or high temperatures.
This is because rubber caps and rubber plugs are specially designed to be
used for applications requiring resistance to heat and chemicals. Available
in various shapes and sizes, rubber hole plugs can be custom made as well to
fit wherever they are needed. The rubber plugs are ideal for masking or
covering parts during high temperature powder coating processes as well as
medical applications where sterilization is needed.
Types of Rubber used in Rubber Hole Plugs
Rubber hole plugs are
made of a wide variety of rubber. Most ofen, various
types of synthetic rubber
such as silicone, EPDM and vinyl are used for making these rubber caps.
While silicone rubber plugs are typically reserved for high
temperature paint masking applications, the EPDM rubber plugs are
inexpensive rubber hole plugs that can be used for a wide variety of
applications.
Vinyl “Rubber” Caps and Plugs
Vinyl Caps and Plugs
Although vinyl
is technically a plastic material, many people refer to vinyl plugs as
rubber caps or rubber plugs. In many ways, both vinyl and rubber are very
similar. Both provide airtight seals and extremely flexible. They insulate.
They also provide a significant level of cushion to the product that they
are protecting. However, vinyl materials cannot resist the high temperature
used in many powder coating curing process which is not the case in rubber
materials. High temperature resistant vinyl plugs or caps perform admirably
in most paint curing systems. Vinyl and rubber closures come in a wide
variety of vibrant colors, shapes and sixes.
Uses of Rubber Hole Plugs
Rubber plugs are used in packaging,
paint masking, thread protection applications etc. They are suitable for
appliances, vehicle, furniture, cabinets, shelf, closet organizers, point of
purchase (POP) displays, store fixtures, shutters, vinyl fences etc. besides
being used to cover high temperature, chemicals filled bottles or objects.
Properties of Rubber Hole Plugs
The rubber types used for making
rubber hole plugs grant them specific properties like oil resistance, ice
resistance, wear resistance etc. In general the rubber plug properties can
be listed as under:
- Rubber hole plugs can resist very high temperatures, up to 600º
F while maintaining their pliable, conforming nature.
- Rubber caps/ plugs are resistant to harsh chemicals.
- They are ideal to be used in anodizing and plating.
- Rubber plugs are excellent rubber seals
for any application requiring a durable closure that can provide a very
tight seal.
- These Also functions well as a noise insulator or inhibitor.
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For bulk requirement of rubber plugs, rubber hole plugs, rubber caps, vinyl
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Types of Rubber Plugs
The rubber hole plugs are categorized into
types on the basis of their applications. Certain rubber plugs are suitable
for electric connectors and some other types of rubber plugs are apt for
high temperature paint masking or on flared fittings. Thus, the types of
rubber plugs- on the basis of their shapes and applications for which they
are used- have been given such names as Rubber Flange Caps, Plus Plugs,
T-Plugs, Pull Plugs, Side Pull Plugs, Electrical Connector Plugs, Threaded
Plugs and Washer Plugs.
Rubber Flange Caps
This is a type of rubber cap or plug, the
design of which simplifies the application and removal of the cap. There is
an internal lip on the open end that provides a positive seal to prevent any
contaminants from seeping onto the part. A flanged head enables the cap or
the plug to be manually removed with ease.
Rubber Plus Plugs
The plus rubber plugs have the unique 360° pull tab design. This
makes them very easy to install. Plus plugs are also handy to use,
especially during manufacturing and shipping as it is easier to insert and
remove them.
Rubber T-Plugs
T-Plugs have tapered design that makes it easy to put inside any
component and to secure it there. Rubber T plugs are low-cost and an
effective option to protect tubing ends, threads and ports, especially
during shipping and storage. These rubber T-plugs come in a wide variety of
sizes.
Rubber Pull Plugs
Pull plugs are longer rubber plugs having a handle like feature. They
are used for sealing both ends of a through hole. Its handle allows for easy
application and removal. A little larger pull plug than the hole size
provides a tight seal. Rubber pull plugs prove to be ideal for plugging both
threaded and non-threaded holes. Silicone pull plugs are specially good for
such applications as powder coating, E-coating, plating, anodizing etc. EPDM
rubber pull plugs are chemical resistant and can withstand temperature upto
450°F (246°C). They can also be re-used in many applications.
Rubber Side Pull Plugs
Side pull plugs are rubber T-plugs with pull tabs. They are designed
for easy removal in the hard to reach locations. They are ideal for NPT and
standard threads. The rubber plug manufacturers generally use low density
polyethylene as the standard material for making side pull plugs but they
can even use other materials as requested by their clients.
Rubber Electrical Connector Plugs
This is another rubber plug designed specifically for electrical
connectors. These rubber plugs are designed to protect female-threaded
electrical connectors from moisture, dirt and dust. They are usually made in
flanged style for easy removal.
Rubber Threaded Plugs
Threaded plugs are rubber plugs with screw hole designed for use on
flared fittings, specially flared JIC fittings (a type of flare fitting
having 37-degree flare seating surfaces, widely used in hydraulic
applications.) Some of the threaded rubber caps and plugs are are also used
to keep dust and debris out of hoses and other plumbing parts during
storage. The parts or rubber threaded plugs are knurled to help during
insertion and removal. They provide positive seal for low pressure
requirements.
Rubber Washer Plugs
Washer plugs not only act as rubber hole plugs, but also mask the
area surrounding the hole. They are widely used for powder coating,
e-coating, plating and anodizing masking where a grounded area must be left
unfinished on the substrate material. A washer plug has two different
diameter tapered ends. This allows dual use in multiple applications.
Silicone washer plugs can withstand 600°F (315°C) and are mostly
reusable.
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