S-96452A106 4-40 x 1/4" ASME B18.3, ASTM F835 Steel Button Head Torx Plus Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with black-oxide coating for prolonged service life in demanding environments
• Superior torque transmission through Torx Plus IP8 drive system, minimizing cam-out and tool wear
• Maximum thread engagement with fully threaded Class 3A fit, ensuring reliable fastening integrity
• High-strength performance from alloy steel construction with 120,000 psi tensile strength
• Optimized head design featuring rounded button profile for reduced snagging and clean aesthetics
• Industry-standard compliance meeting ASME B18.3 specifications for guaranteed interchangeability
• Environmental responsibility through RoHS 3 and REACH compliance for sustainable manufacturing

Professional Applications & Engineering Value

These black-oxide alloy steel screws deliver critical performance advantages in precision assemblies where vibration resistance and consistent clamping force are paramount. The Torx Plus drive system (T8 size) prevents stripping common in Phillips drives, while the fully threaded 4-40 UNC coarse spacing design ensures maximum thread contact in thin materials and blind holes. The rounded button head profile provides a low-profile finish ideal for applications with clearance constraints, from electronic enclosures to automotive components. With 120,000 psi tensile strength and Rockwell C39 hardness, these fasteners maintain integrity under dynamic loads while the black-oxide surface treatment offers superior corrosion protection compared to standard finishes.

Specification Summary & Compliance

Manufactured to ASME B18.3 specifications with Class 3A thread fit for precision tolerance. Features 4-40 UNC coarse threads with right-hand direction and 1/4" length. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards. Meets ASTM F835 material specifications for consistent quality assurance.