S-90019A130 1/4"-20 x 1" ASME B18.2.1, SAE J429 High-Strength Grade 8 Steel Thread-Locking Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional load-bearing capability with Grade 8 classification and 150,000 psi tensile strength for reliable performance in high-stress environments
• Vibration-resistant locking provided by the integrated nylon patch, maintaining fastener integrity across a wide temperature range from -55° to 250°F
• Superior corrosion protection through zinc yellow-chromate plating that extends service life in harsh industrial conditions
• Precise thread engagement with UNC coarse threading and Class 2A fit ensuring consistent installation and reduced cross-threading risks
• Optimized torque transmission via the external hex drive design that allows for high tightening forces without stripping
• Full thread coverage along the entire 1" length for maximum grip strength and distribution of clamping forces
• Industry-standard compliance meeting ASME B18.2.1 and SAE J429 specifications for guaranteed interchangeability and quality assurance

Professional Applications & Engineering Value

Engineered for demanding industrial applications, these Grade 8 hex head screws deliver critical performance where vibration resistance and structural integrity are paramount. The nylon patch thread locker effectively prevents loosening under dynamic loads, making these fasteners ideal for machinery, automotive assemblies, and heavy equipment subjected to constant stress cycles. The zinc yellow-chromate plated steel construction provides dual protection against corrosion and wear, while the UNC coarse thread design ensures rapid installation and reliable performance in high-volume manufacturing environments. With fully threaded configuration and external hex drive, these screws offer maximum clamping force distribution and straightforward installation using standard tools, reducing assembly time and maintenance requirements in industrial settings.

Specification Summary & Compliance

These 1/4"-20 x 1" hex head screws feature Class 2A thread fit tolerance for precise engagement and are manufactured to ASME B18.2.1 and SAE J429 specifications. The UNC coarse thread pattern with right-hand direction provides standardized compatibility across industrial applications. The fasteners maintain Rockwell C33 hardness and are produced in compliance with industry standards for dimensional accuracy and mechanical properties, ensuring reliable performance in critical assemblies.