S-92316A321 5/16"-24 x 1" IFI 111, SAE J429 High-Strength Grade 8 Steel Flanged Hex Head Screws

Key Features & Benefits at a Glance

• Maximum load-bearing capability with 150,000 psi tensile strength and Grade 8 classification, ideal for high-stress industrial environments.
• Superior corrosion resistance from the black phosphate steel coating, extending service life in harsh conditions.
• Precise thread engagement with UNF fine threads and Class 2A fit, ensuring reliable, vibration-resistant connections.
• Enhanced stability and distribution due to the flanged hex head design, reducing surface damage and improving clamping force.
• Consistent hardness and durability with Rockwell C32 rating, maintaining performance under repetitive loads.
• Full threading for versatile fastening, allowing secure attachment across the entire 1" length in various applications.
• Compliance with industry standards including SAE J429, RoHS 3, and REACH, ensuring safety and environmental responsibility.

Professional Applications & Engineering Value

Engineered for heavy-duty applications, these Grade 8 hex head screws address critical challenges in machinery, automotive, and construction sectors. The black phosphate coating on steel provides a robust barrier against rust and wear, essential in environments with moisture or chemicals. Featuring UNF fine threads and a flanged head, the screw offers superior vibration resistance and even pressure distribution, preventing loosening and material damage. This design is particularly valuable in assemblies requiring high tensile strength and reliable fastening, such as engine components or structural frames, where failure is not an option. By integrating fully threaded construction and right-hand threading, it ensures quick installation and secure holds, reducing maintenance needs and downtime in industrial operations.

Specification Summary & Compliance

This screw adheres to precise dimensional standards, including a Class 2A thread fit for consistent accuracy and UNF fine threading with a 5/16"-24 size. It meets SAE J429 specifications for Grade 8 fasteners, ensuring high strength and reliability. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, it supports environmental safety and restricted substance control. The product is manufactured to deliver optimal performance in line with industrial fastener requirements.