S-90124A316 1/4"-20 x 1 1/2" ASME B18.2.1, SAE J429 Steel Wire-Lockable Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional Load-Bearing Capacity: With 120,000 psi tensile strength and Grade 5 classification, this screw reliably handles high-stress applications without failure.
• Superior Corrosion Resistance: The black-oxide steel finish provides durable protection against rust and environmental degradation in demanding industrial settings.
• Optimized Thread Engagement: UNC coarse threading ensures quick assembly and secure fastening, even in materials with varying densities.
• Enhanced Torque Application: The external hex drive and standard 7/16" head width allow for high torque transfer using common tools, reducing installation time.
• Controlled Thread Distribution: Partial threading concentrates strength where needed most, minimizing stress concentration points in assembled components.
• Precision Manufacturing: Class 2A thread fit guarantees consistent performance and reliable interchangeability in volume production environments.
• Regulatory Compliance Assurance: Meets ASME B18.2.1 specifications and RoHS 3 standards, ensuring quality and environmental responsibility.

Professional Applications & Engineering Value

This Grade 5 hex head screw delivers critical performance in heavy machinery, structural frameworks, and industrial equipment where vibration resistance and tensile strength are paramount. The black-oxide steel construction combats corrosion in harsh environments, while the UNC coarse thread design prevents cross-threading and enables rapid assembly in production lines. With partial threading concentrating structural integrity, it effectively resists loosening under dynamic loads. Engineers specify this ASME B18.2.1 compliant fastener for applications requiring reliable 120,000 psi tensile strength and consistent Rockwell C25 hardness, making it ideal for automotive, construction, and manufacturing sectors where failure is not an option.

Specification Summary & Compliance

This hex head screw maintains precise Class 2A thread fit tolerances with 1/4"-20 UNC coarse threads and partial threading up to 3/4" minimum length. Manufactured to ASME B18.2.1 specifications where identified with SAE J429, it meets Grade 5 mechanical properties including 120,000 psi tensile strength and Rockwell C25 hardness. The fastener is RoHS 3 (2015/863/EU) Compliant, ensuring environmental regulation adherence for global industrial applications.