SEM Screws & Metric Fasteners

SEMs, or pre-assembled screws, are fasteners that incorporate a separate washer held by the threads on a fastener. Valley Fastener manufactures both inch and metric SEMs screws in a variety of sizes. We have the ability to run sems screws up to 1/4 inch diameter. We manufacture both inch and metric SEMs fasteners for your specific application requirements. The incorporated washer can be many different styles depending on the application, including Conical, Flat, Square Cone, or Internal/External lock.

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Customization Options

Head Styles

Binding
Button
Cheese
Fillister
Flat
Hex
Hex Flange
Hex Washer
Oval
Oversized
Pan
Round
Round Washer
Truss
Wafer
Custom

Materials

Low Carbon Steel
Medium Carbon Steel
Aluminum
Brass
Copper
300 Series Stainless
400 Series Stainless

Point Features

Anti-Cross Threading
Dog Point
Header Point
Custom

Thread Types

Machine Screw
Tapping Screw
Tri-lobular
Thread Forming
Type AB
Type B
Type BF
Type BP
Type C
Type CA
Type F
Type G
Type U
Type 1
Type 23
Type 25

Drive Type

ACR Phillips II
Combination
External Torx
Hex Drive
Hex Flange
Hex Head
Hex Washer
Philips
Philips 1A
Philips Square Drive
Slotted

Plating, Coating, & Heat Treat

Selected by end user, dependent on application

Benefits of SEMs Screws

SEMS screws come pre-assembled with a washer, eliminating the need to separately source and install washers. This streamlines the assembly process, saving time and boosting productivity. With the washer permanently attached to the screw, there's a reduced risk of it being lost during assembly, ensuring a more efficient workflow. By combining the screw and washer into a single component, SEMS screws can help reduce the number of part numbers in a bill of materials, simplifying inventory management.

What Are SEMs Screws Used For?

SEMS screws are used across various industries where fast assembly, reliable fastening, and minimizing the risk of lost parts are essential. With their unique design that combines a screw and an integrated washer, they are particularly suited for sectors such as electronics, automotive, and industrial manufacturing. Offering secure fastening while streamlining the assembly process, SEMS screws provide a versatile, cost-effective solution for numerous applications.

Common Applications for SEMs Screws

In the automotive industry to secure interior panels, brackets and trim assemblies.
Fastening frames, moving assemblies and casings in the furniture industry.
In the electrical industry fastening enclosures, circuit boards, and other components.

Why Valley Fastener?

As a SEMs screw manufacturer, we know that your reputation depends on the quality and performance of our products. We have nearly 50 years in business as a supplier for major OEMs covering diverse market sectors including automotive, electrical, appliance, recreational, agricultural, military & defense, furniture, energy, and household goods. Valley Fastener is one of the largest fastener manufacturers in North America with an international distribution network allowing us to control quality from design through delivery. Let our manufacturing expertise guide your product design to ensure you’re getting the best solution for your fastening needs.

Contact one of our SEMs screw experts today to answer any questions or for a detailed quote.

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