S-90602A238 1/2"-13 x 3" IFI 111, SAE J429 High-Strength Grade 8 Steel Flanged Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 150,000 psi ensures reliable performance in high-stress applications, reducing the risk of fastener failure.
• Superior corrosion resistance from zinc yellow-chromate plating extends service life in harsh industrial environments, minimizing maintenance needs.
• High-strength Grade 8 classification and Rockwell C32 hardness provide consistent durability and load-bearing capacity for heavy-duty assemblies.
• Flanged head design distributes clamping force evenly, eliminating the need for separate washers and speeding up installation.
• Precision Class 3A thread fit with UNC coarse threading ensures secure, vibration-resistant connections in demanding machinery.
• Partially threaded shank allows for unthreaded grip length, enhancing shear strength and alignment in structural applications.
• Compliance with SAE J429/IFI 111 standards guarantees consistent quality and interchangeability for industrial procurement.

Professional Applications & Engineering Value

Engineered for heavy-duty industrial applications, this Grade 8 hex head screw combines zinc yellow-chromate plated steel construction with a robust UNC coarse thread to address common challenges like vibration loosening and environmental corrosion. The flanged design simplifies assembly by integrating a washer-like base, reducing component count while improving load distribution. Ideal for machinery, construction equipment, and automotive frames, its 150,000 psi tensile strength and Class 3A thread fit ensure reliable fastening under dynamic loads, minimizing downtime and maintenance costs in critical operations.

Specification Summary & Compliance

This screw adheres to UNC thread standards with a Class 3A thread fit for precise engagement, and meets SAE J429 (IFI 111) specifications for Grade 8 fasteners. It features a 1/2"-13 coarse thread, partial threading, and a 3" length with consistent dimensional accuracy. The zinc yellow-chromate plating provides RoHS and REACH compliance, supporting use in regulated industries while enhancing corrosion protection.