S-92316A548 1/4"-20 x 1 3/4" IFI 111, SAE J429 High-Strength Grade 8 Steel Flanged Hex Head Screws

Key Features & Benefits at a Glance

• Maximum Load-Bearing Capacity - Grade 8 classification and 150,000 psi tensile strength ensure reliable performance in high-stress industrial applications.
• Superior Corrosion Resistance - Black phosphate steel coating provides durable protection against rust and environmental degradation.
• Optimized Thread Engagement - UNC coarse thread spacing with Class 2A fit guarantees secure fastening and vibration resistance.
• Enhanced Installation Efficiency - External hex drive and flange design eliminate need for separate washers while providing superior torque transmission.
• Precision Engineering - Partially threaded configuration with 3/4" minimum thread length ensures optimal clamping force distribution.
• Industry Compliance Assurance - Meets SAE J429 specifications while being RoHS 3 and REACH compliant for global applications.
• Dimensional Consistency - Rockwell C32 hardness maintains structural integrity through repeated installation cycles.

Professional Applications & Engineering Value

Engineered for demanding industrial environments, these Grade 8 hex head screws deliver exceptional performance where vibration resistance and structural integrity are paramount. The black phosphate steel construction provides superior corrosion protection in manufacturing, automotive, and heavy equipment applications. The UNC coarse thread design ensures rapid installation while maintaining holding power in softer materials and high-vibration scenarios. The integrated flange head distributes clamping force evenly, eliminating washer requirements and reducing assembly time. With partial threading optimizing grip range, these fasteners prevent joint loosening in dynamic load conditions, making them ideal for structural frameworks, machinery assembly, and automotive subsystems where 150,000 psi tensile strength is critical for safety and longevity.

Specification Summary & Compliance

Manufactured to precise Class 2A thread fit tolerances with UNC 1/4"-20 thread specifications. Complies with SAE J429 standards for Grade 8 fasteners, ensuring consistent mechanical properties and dimensional accuracy. Meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental compliance requirements. Features Rockwell C32 hardness and 150,000 psi tensile strength verification per industry testing protocols.