S-90357A027 3/8"-16 x 1" Alloy Steel Ultra-Low-Profile Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 140,000 psi ensures reliable performance under high-stress conditions, reducing the risk of fastener failure in demanding applications.
• Precision Class 3A thread fit guarantees superior engagement and consistent clamping force, minimizing loosening and vibration-related issues.
• Black-oxide surface treatment on alloy steel provides enhanced corrosion resistance and a durable, non-reflective finish suitable for harsh industrial environments.
• Ultra-low profile socket head design allows for installation in confined spaces while maintaining high torque capability with a standard 3/16" hex drive.
• Coarse 3/8"-16 UNC threads enable faster assembly and reduced cross-threading risk, improving installation efficiency and reliability.
• Full threading along the 1" length offers maximum adjustability and secure fastening across the entire shank for versatile mounting solutions.
• Compliance with RoHS 3 and REACH regulations ensures environmental safety and global acceptability for use in regulated industries and international supply chains.

Professional Applications & Engineering Value

Engineered for precision and durability, these socket head cap screws are ideal for applications requiring high clamp load and space efficiency. The black-oxide alloy steel construction resists corrosion and wear, making them suitable for machinery, automotive assemblies, and heavy equipment where exposure to oils and moisture is common. The ultra-low profile head and 3/8"-16 UNC coarse threads facilitate quick installation in tight clearances, while the Class 3A thread fit ensures minimal backlash and vibration resistance. With a Rockwell C32 hardness and robust tensile strength, they provide long-term reliability in dynamic load conditions, reducing maintenance needs and downtime in industrial operations.

Specification Summary & Compliance

This fastener adheres to UNC coarse thread standards with a precise Class 3A thread fit for consistent performance. Dimensions include a 1" length with a tight tolerance of -0.005" to 0.005", ensuring accurate fitment. Manufactured from alloy steel and treated with a black-oxide finish, it meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, supporting use in environmentally conscious and regulated industries.