High-Strength TORX PLUS Drive Precision Screws

TORX PLUS cylinder head screw: a squarer recess profile carries more torque at lower stress in the recess floor.

Key specifications

MaterialSWRCH18A / SUS302HQ
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

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Product overviewOverview

A star recess has six curved lobes, and the bit contacts the walls over an area rather than at four points. The TORX PLUS lobe is closer to square than a standard star, so the bit contacts more of the flank and the recess floor sees lower stress for the same torque. The trade-off is that a standard star bit will not enter the recess at all.

Material: SWRCH18A / SUS302HQ. It is driven with a star bit.

Key featuresFeatures

More flank contact, lower stress in the recess floor.
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

Premium appliance control boards
Smartphone and tablet internal frames
Robot joints and dexterous hands

Selection notesSelection

Match bit to recess exactly; mixing the two damages both. On automated lines, change the bit with the part and verify torque on the first article.

Frequently asked questionsFAQ

Will a standard star bit drive a TORX PLUS screw?

No. The flank angle differs, so the bit cannot seat fully and will cam out, damaging the recess. Bits must be changed whenever the screw type changes.

What matters during installation of the High-Strength TORX PLUS Drive Precision Screws?

Drive it with a star bit in an electric screwdriver. More flank contact, lower stress in the recess floor.

Specifications

Material	SWRCH18A / SUS302HQ
Thread Tolerance	6g
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.