S-90129A114 1/4"-20 x 1 1/2" IFI 111, SAE J429 Medium-Strength Grade 5 Steel Flanged Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 120,000 psi ensures reliable performance under high-stress conditions, reducing the risk of fastener failure in demanding applications.
• Black corrosion-resistant coating provides enhanced durability against rust and environmental exposure, extending service life in harsh industrial settings.
• Grade 5 classification guarantees consistent mechanical properties and load-bearing capacity, meeting rigorous SAE J429 standards for quality assurance.
• Coarse UNC threading offers faster installation and improved resistance to vibration loosening compared to fine threads, ideal for assembly efficiency.
• Flanged hex head design eliminates the need for a separate washer, distributing clamp load evenly and simplifying inventory management.
• Partial threading allows for precise clamping control on specific joint lengths, minimizing material stress and improving structural integrity.
• Full compliance with RoHS 3 and REACH regulations ensures environmental safety and global market accessibility for regulated industries.

Professional Applications & Engineering Value

Engineered for heavy-duty industrial applications, this Grade 5 hex head screw combines black corrosion-resistant coated steel construction with UNC coarse threading to address common challenges like vibrational loosening and environmental degradation. The flanged design provides stable bearing surfaces, reducing point stress on assembled materials, while the partial threading ensures optimal grip length without unnecessary thread engagement. Ideal for machinery assembly, structural frameworks, and automotive components, it delivers consistent tensile strength and hardness (Rockwell C22) to maintain joint integrity under dynamic loads. By meeting IFI 111/SAE J429 specifications, it offers reliability in sectors requiring certified fasteners for safety-critical connections, from manufacturing plants to construction projects.

Specification Summary & Compliance

This screw features precise Class 2A thread fit for consistent engagement and UNC 1/4"-20 coarse thread dimensions (0.25" diameter, 3/4" min thread length). Manufactured to IFI 111 SAE J429 standards, it ensures mechanical properties align with Grade 5 requirements. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) for hazardous substance restrictions, supporting use in regulated environments.