Torx Dual-Component Screw with Integrated Vibration Lock

Star recess screw with a spring washer and flat washer assembled on the shank, so one pick places all three parts.

Key specifications

Installationstar bit in an electric driver
StandardGB/T 3098.1, GB/T 197
Typical substrateprecision electronics and robot joints
Key inspectionsrecess dimensions, torque, thread gauging
Drive TypeTorx T
Drivestar recess

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Product overviewOverview

Recesses come in a standard depth and in enhanced profiles (the IP series) with more vertical walls and greater effective engagement height. The washers are rolled over the thread end and cannot fall off, so the assembly step goes from three picks to one and a missing washer becomes impossible. Order matters: the spring washer sits under the head and the flat washer against the part.

installed by star bit in an electric driver.

Key featuresFeatures

Captive washers remove the missed-washer failure mode.
Standard or enhanced recess profiles available to match the required torque.
Cylindrical head with a square bearing face keeps clamp pressure even.
Options include pre-applied locking patch, decorative PVD and zinc-nickel corrosion protection.

Typical applicationsApplications

Robot joints and dexterous hands
Precision gearboxes and servo motor end caps
Automotive electronic control units

Selection notesSelection

Confirm spring washer under the head and flat washer against the workpiece, and check that the washer outside diameter clears the surrounding geometry.

Frequently asked questionsFAQ

Can the washer order be reversed on a SEMS screw?

No. With the order reversed the spring washer bears directly on the workpiece, marking the surface and losing its preload function.

What matters during installation of the Torx Dual-Component Screw with Integrated Vibration Lock?

Drive it with a star bit in an electric screwdriver. Captive washers remove the missed-washer failure mode.

Specifications

Drive Type	Torx T
Standard	GB/T 3098.1, GB/T 197
Drive	star recess
Installation	star bit in an electric driver
Typical substrate	precision electronics and robot joints
Key inspections	recess dimensions, torque, thread gauging

Manufacturing and inspection

Bit-and-screw driving trials record recess wear after 1,000 cycles.Alternative materials and finishes can be quoted side by side during sampling, so cost and corrosion resistance can be traded off explicitly.