S-94414A372 1/4"-28 x 1" ASME B18.3, ASTM F835 Alloy Steel Torx Flat Head Screws

Key Features & Benefits at a Glance

• Superior torque transmission with Torx Plus IP30 drive, reducing cam-out and tool wear for reliable, efficient installation.
• Exceptional strength and durability from alloy steel with 140,000 psi tensile strength and Rockwell C39 hardness, ensuring long-term performance under high stress.
• Enhanced corrosion resistance provided by the black-oxide surface finish, extending service life in demanding industrial environments.
• Precise, secure fastening with a Class 3A thread fit and UNF fine thread, offering excellent vibration resistance and joint integrity.
• Flush, low-profile installation thanks to the standard 82° flat head countersink, ideal for applications where a smooth surface is critical.
• Full regulatory compliance with ASME B18.3, ASTM F835, RoHS 3, and REACH, ensuring safety and environmental standards are met.
• Versatile right-hand threading and fully threaded design for consistent grip and ease of use in a wide range of assembly tasks.

Professional Applications & Engineering Value

These 1/4"-28 UNF flat head screws are engineered to solve critical challenges in precision assemblies. The black-oxide alloy steel construction provides a robust combination of 140,000 psi tensile strength and corrosion resistance, making them ideal for automotive, aerospace, and heavy machinery applications where reliability is non-negotiable. The Torx Plus IP30 drive minimizes slippage, allowing for higher torque application without damaging the fastener head, which is crucial for automated or high-volume production lines. With a Class 3A thread fit and fine threading, these screws ensure tight, vibration-resistant connections in components subject to dynamic loads. The 82° countersink angle enables a flush finish, reducing protrusion risks in confined spaces. This design directly addresses common issues like fastener failure, installation inefficiency, and environmental degradation, delivering consistent performance in demanding industrial fastening scenarios.

Specification Summary & Compliance

This product adheres to precise dimensional and performance standards, including a Class 3A thread fit for superior tolerance and a UNF fine thread (1/4"-28) for enhanced grip. Manufacturing and material specifications comply with ASME B18.3 and ASTM F835, ensuring consistency and reliability. Environmental and safety regulations are fully met, with certifications for RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, confirming the absence of hazardous substances and supporting sustainable procurement practices.