For over seven decades, Caplugs has been the trusted partner for vehicle manufacturers, with thousands of catalog parts and custom automotive part designs for product protection and finishing.

Automotive Parts

Automotive Solutions from Caplugs

Caplugs manufactures parts used across all vehicle components. Our parts are used to protect valuable components during shipping to the assembly plant, or used as permanent finishing parts of the vehicle assembly. We offer thousands of standard catalog parts available to order online, or our custom design engineers can help develop parts to fit your exact specifications. Learn more about our automotive experience online and discover why Caplugs is a trusted partner for the auto industry.

Discover Products for Popular Automotive Applications

View the Automotive Catalog

Caplugs has tooled a wide range of caps, plugs, finishing parts and masking devices commonly used in the automotive industry. Our catalog parts are in stock and available to ship today so you can get the parts you need when you need them. All standard parts are also available to sample free of charge so you can test them in your application before placing a full order.

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Parts for All Vehicle Components

Caplugs manufactures parts used across all vehicle components. Our parts are used to protect valuable components during shipping to the assembly plant or installed as permanent parts of the vehicle assembly. Thousands of catalog parts are available to order online, or our engineers can help develop custom designed parts to meet your exact specifications. Call 888.CAPLUGS to talk with an expert about your next project.

Custom Solutions

Custom Solutions for the Auto Industry

As a preferred supplier to the automotive industry for over 70 years, Caplugs understands the demands and processes needed to be your trusted molding partner. Certified to meet IATF 16949, we have PPAP processes and protocols in place to produce a custom part for your next project.

Caplugs has a team dedicated to developing custom solutions and is experienced at working alongside our customers to move each project efficiently from concept and prototyping to production and shipment. With six different molding processes and an in-house tool room, we have complete control over the project, ensuring speed, accuracy, quality, consistency and delivery you can rely on.

If you don't see what you're looking for in our catalog, contact our team of experts. Whether you need a modification of an existing part to meet your need or a fully custom piece, our custom team will work with you on the right solution. We offer adaptability and scalability with our interchangeable mold systems and thousands of molds not represented in our catalog. When you start your project with Caplugs, you can trust we will solve your challenge. Contact our team today to get the product protection you need for your automotive parts.

Body & Chassis

  • Body plugs
  • Overslam bumpers
  • Front and rear exhaust heat shields


  • Ultrabake™ caps, plugs, tapes and die-cuts
  • Withstand process temperatures up to 600°F (315°C)

Fuel System

  • Heat shields
  • O-rings
  • Caps and plugs
  • Parts designed to fit SAE fuel lines and quick connects

HVAC & Thermal Units

  • Block and condenser caps
  • Thermal unit caps

Steering & Suspension

  • Rod covers
  • Ball joint caps
  • Shock tower caps
  • Bleeder valve caps and plugs
  • Stabilizer bushings
  • Suspension spring seals
  • Masking parts for brake assemblies

Electrical System

  • Distribution coil boots
  • Spark plug boots
  • Fuse box covers
  • Electrical connector protection

Engine & Powertrain

  • Shift caps
  • Overslam bumpers
  • Driveshaft protection
  • Housing covers
  • Transmission boots
  • Seals
  • Bushings
  • Caps and plugs

Interior & Exterior

  • Grommets, gaskets, bumpers and dampeners for small motors
  • Button and body plugs for doors, undercarriages, body panels, access panels and other ports

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When you need a custom protective part for a unique need, let the largest, most experienced in-house team of design engineers develop it for you from initial design to final production. We offer extensive custom molding solutions to meet your cost, performance, and production requirements

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