S-92620A112 1/4"-32 x 1" ASME B18.2.1, SAE J429 High-Strength Grade 8 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Maximum Load-Bearing Capacity: With a tensile strength of 150,000 psi, these screws withstand extreme stress and vibration, reducing the risk of fastener failure in critical assemblies.
• Superior Corrosion Protection: The zinc yellow-chromate plating offers excellent resistance to rust and environmental degradation, extending the service life of your equipment.
• Precision Thread Fit for Secure Fastening: Class 2A thread fit ensures consistent, reliable engagement with mating parts, minimizing loosening and maintaining joint integrity.
• Enhanced Thread Engagement in Thin Materials: The extra fine UNEF thread (1/4"-32) provides more threads per inch, ideal for securing thin-section components and fine-adjustment applications.
• High-Strength Material for Demanding Environments: Grade 8 steel with Rockwell C33 hardness delivers exceptional durability and resistance to wear, suitable for heavy machinery and structural applications.
• Optimized Drive Torque and Installation: The external hex head design allows for high torque application with standard tools, facilitating efficient assembly and disassembly.
• Full Threading for Maximum Grip: Fully threaded shank ensures uniform clamping force along the entire length, providing superior holding power in diverse material thicknesses.

Professional Applications & Engineering Value

Engineered for heavy-duty industrial applications, this Grade 8 hex head screw addresses critical challenges in machinery assembly, automotive systems, and structural frameworks where high tensile strength and vibration resistance are paramount. The UNEF extra fine thread (1/4"-32) offers superior holding power in thin materials and fine-pitch adjustments, preventing strip-out in delicate components. Manufactured from high-strength steel and finished with zinc yellow-chromate plating, it combats corrosion in harsh environments, reducing maintenance downtime. Compliant with ASME B18.2.1 and SAE J429 standards, it ensures reliability in precision engineering and safety-critical fastening, making it an ideal choice for OEMs and MRO professionals seeking durable, specification-compliant solutions.

Specification Summary & Compliance

This fastener adheres to Class 2A thread fit for consistent assembly tolerance and features a fully threaded 1/4"-32 UNEF extra fine thread with right-hand direction. It meets ASME B18.2.1 and SAE J429 specifications for dimensional accuracy and mechanical properties, ensuring interoperability in standardized systems. The zinc yellow-chromate plating provides RoHS and REACH-compliant corrosion resistance, supporting use in regulated industries requiring high-strength, corrosion-resistant fasteners.