Plugs

Reliable, durable and versatile product protection

Caplugs stocks a diverse collection of plugs to fit a range of products. Find protective solutions for your needs and shop online today.

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Protective Plug Subcategories

Explore our full selection of protective plugs

Block dust, dirt and moisture

Protective plugs prevent water, oil, dust and other contaminants from damaging your products.

Threaded, non-threaded & more

Find non-threaded parts or plugs made for imperial, metric, BSP, NPT and other common thread types.

Convenient design features

Shop plugs with pull tabs, slotted heads, hanger holes and other features for easier install and removal.

Discover the full catalog of plugs for masking, sealing, finishing and more – available in a wide range of standard materials, sizes, shapes and colors.

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Introducing

RPO Series SAE Straight Threaded Plugs

The RPO Series of threaded plugs are designed for SAE straight-threaded ports. Featuring a slotted 12-point head for easy install and a molded O-ring to seal and prevent leakage.

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High Performance Materials

Protective caps are made using a variety of standard material options, giving our parts different performance features to meet your specific application or working conditions.

Low-density polyethelene
High-density polyethylene
Conductive polyethelene copolymer
Static dissipative polyethylene
FlexTemp (thermospastic rubber)
Recyclable polyethylene
Vinyl
Flex500^TM Vinyl
Steel & zinc plate
Silicone
Neoprene
Aluminum

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Material temperature ratings range from 150°F to 650°F. Find the best material for your environmental needs.

Material by Temperature

Custom Solutions

Injection molding solutions for unique challenges

Molding Capabilities

Design a part

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