outside of Seastrom Plant

About Us


Proudly Made in America for over 90 years

Seastrom is a true story of the American Dream. Founded in Glendale, California in 1928 by Wensil Seastrom in his garage, Seastrom filled a need for electric motor components and quickly became a job shop for the growing aerospace industry, The company resided in Glendale in several locations until 1994, when it moved to Twin Falls, Idaho. Still family owned today, Seastrom’s state-of-the-art 100,000 square foot facility houses the premier stocking manufacturer of precision assembly hardware.

Seastrom is dedicated to consistently producing quality products. We have earned the distinction as an approved supplier for most major aerospace and commercial manufacturers. Seastrom Manufacturing is a full-service precision parts manufacturer with advanced capabilities in:

We manufacture in most metallic and non-metallic materials. We also offer secondary operations, assembly, and packaging. Seastrom emphasizes systems integration, quality engineering, in-house die design and tooling, high-speed production, facility-wide networking, and strict manufacturing controls to promote product quality, project safety, and conformance to technical standards.

Seastrom, as a multi-faceted precision parts manufacturer, has the most comprehensive online catalog of standard washers and assembly hardware. We stock over 60,000 part numbers, including:

Seastrom is also a proud supplier of military washers, fasteners, and hardware (M, MS, NAS & AN)

Seastrom's reputation for quality workmanship assures each customer that their product needs will be met. We not only make quality parts, we help make quality products.

who we are

Black and white newspaper image of Seastrom family surveying land in Idaho
Twin Falls bridge

what we are about


As budgets tighten and more is expected, Seastrom delivers the stock inventory, personnel, and expertise to help control costs. Choose from our vast selection of stocked standard precision hardware to find the part that meets your specifications. If stocked standards don't meet your requirements, we can help engineer new custom washers and assembly hardware, recommend economical purchasing, and stock proprietary products for immediate delivery.

Seastrom emphasizes systems integration, quality engineering, high-speed production, facility-wide networking and strict project control to promote product quality, project safety and conformance to technical standards. We utilize virtually all stampable metals and non-metals. Seastrom specializes in extensive die and material changes to meet the wide variety of customer orders and our reputation for quality workmanship assures each customer that their product needs will be met. Our goal is to be your one stop partner for precision fasteners.

miscelanious clamps

Stock Standard Fasteners

Seastrom manufactures and stocks the largest quantity of precision fasteners in the industry. Over 44,000 part numbers equating to over 158 million parts. This inventory gives our customers’ options when buying standard and specialty hardware. If we do not have exactly what you need, we may have an equivalent part close enough in size, thickness, material or plating to meet your needs. All Seastrom standard parts are listed online with their price, stock and delivery for ease of use. Online ordering is also available. If a pricing is not available an email quote request is provided for our customer’s convenience.

miscelanious insulators

Standard Part Modifications

Seastrom’s large tool and die department enables us to easily modify our standard tooling to accomodate basic standard part modifications. This enables our customers to avoid costly custom tooling when their specification is close to one of our standards (ie. modifications in length, width, number of holes, etc.)

miscelanious notch washers

Custom Products

Custom products are a specialty of Seastrom Manufacturing. As a full service manufacturer and we can help our customers save time and money on a custom product beginning with the design process. Seastrom has multiple methods of manufacturing (ie. Stamping, CNC, Screw Machine, Four Slide) which translates into a vast amount of knowledge that our customers can draw upon. Our in-house engineering departments can work with our customers’ engineers to recommend manufacturing methods, materials, tolerances, and configurations that are possible in each method of manufacturing. All our engineering department requires are quantities, target pricing and the ability to view the whole assembly. If you don’t have the capability to make a schematic, they can do that for you, as well as reverse-engineer an existing part that you don’t have dimensions for. As the project develops, quotes can be given on the parts to make sure you stay within your price point. Projects can consist of only one part, or as many as you require.