Aerospace & Defense

From sheet metal plugs and edge liners to window masking and electronic connector protection, Caplugs has served customers in aerospace, defense and aviation since 1948.

Aerospace & Defense Parts

Aerospace & Defense Solutions from Caplugs

Aerospace and defense customers have a wide range of protective plastic needs. From access panel closures to electronic connector protection, Caplugs has supplied the aviation, aerospace and defense market for more than 70 years.

Available in hundreds of sizes and geometries, we can solve most challenges with a catalog part, including many molded components that have been designed to fit common MIL/NAS specifications. But if you need a product with special modifications, we can also customize it for you. Choose from material options for existing catalog products such as high-performance materials, which include fire retardant, conductive, UV resistant, chemical resistant and other properties. If you don't see the part you need, contact our custom team and work directly with our engineers to design and produce a part to meet your specific needs.

Get the right part to protect your products or components during shipment, storage, assembly, repair, refurbishing or finishing with molded components from Caplugs – the ideal partner and single source for all of your molded component needs.

View the Aerospace & Defense Catalog

Many customer challenges can be solved with standard catalog parts. Explore the hundreds of sizes and geometries available for aerospace and defense customers.

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Military & NAS Specifications

The following Caplugs parts are in accordance with the corresponding specifications. Click the series links for detailed product information.

MS90376 and AS90376 have been superseded and replaced by SAE AS 85049/138


All statements, technical information, and recommendations related to Caplugs products are based on information believed to be reliable, however, the accuracy or completeness is not guaranteed. Before using any Caplugs product you must evaluate it and determine if it is suitable for your intended application. You assume all risks and liability associated with such use. Any statements related to the product which are not contained in Caplugs current publications, or any contrary statements contained on your purchase order shall have no force or effect unless expressly agreed upon, in writing, by an authorized officer of Caplugs.

Spec Number
NAS 831
NAS 832
NAS 833
NAS 834
NAS 835
NAS 836
NAS 837
NAS 838
NAS 839
NAS 840
NAS 841
NAS 842
NAS 843
NAS 844
NAS 845
NAS 846
NAS 847
SAE AS85049/138
Custom Solutions

Custom Solutions for the Aerospace & Defense Industries

The OEMs and MROs of the aerospace and defense market use a wide range of parts for protection, finishing, shipping and masking. At Caplugs, we don't just sell parts – we're here to ensure our customers’ needs are met with the right part that protects your component from impact and FOD during shipment, storage, assembly, repair, refurbishment and finishing processes.

We know that your part needs can range from components used to conceal access panels or protect electrical connectors to window masking needed during fleet maintenance and upkeep. Caplugs has been supplying the aerospace, aviation and defense industries since 1948, and offers comprehensive custom part development options to meet a customer’s specific need.

Our engineers can modify catalog components to increase the range of available sizes, or work on a fully custom solution with unique geometries or specific material selection options that can increase part performance to offer fire retardance, conductivity, UV resistance, chemical resistance and more. With an in-house toolroom, team of design engineers and comprehensive PPAP process, we make custom fast and easy.

As a trusted supplier, many of our aviation customers have come to us for custom molded components to fit their specific application. Let us take your project from concepting and prototyping to full production. Click below to learn more.

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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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