S-90272A405 1/4"-28 x 1/4" ASME B18.6.3 Steel Pan Head Phillips Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction, ensuring long-lasting performance in harsh industrial environments.
• High tensile strength of 60,000 psi provides reliable fastening under heavy loads, reducing the risk of mechanical failure.
• Fine UNF thread with Class 2A fit offers precise engagement and vibration resistance, ideal for applications requiring secure, tight seals.
• Phillips No. 3 drive design enables efficient installation with common tools, minimizing assembly time and labor costs.
• Fully threaded shank ensures consistent holding power along the entire length, enhancing joint stability in various materials.
• Compliance with ASME B18.6.3, RoHS 3, and REACH guarantees adherence to industry standards and environmental safety, supporting global supply chain requirements.
• Rockwell B70 hardness maintains thread integrity and durability, resisting wear during repeated use or adjustments.

Professional Applications & Engineering Value

This 1/4"-28 UNF rounded head screw is engineered to address common industrial challenges, such as vibration loosening and corrosion in demanding settings. Made from zinc-plated steel, it provides a protective barrier against moisture and chemicals, extending service life in machinery, automotive assemblies, and electrical enclosures. The fine thread and Class 2A fit ensure precise alignment and reduced backlash, critical for applications requiring high torque and stability. With a Phillips drive and fully threaded design, it simplifies installation in tight spaces, boosting efficiency in production lines. Ideal for OEM and MRO uses, this screw delivers reliable performance while meeting strict ASME B18.6.3 standards and environmental regulations like RoHS and REACH.

Specification Summary & Compliance

This product features a 1/4"-28 UNF thread with Class 2A tolerance for accurate fit, a head diameter of 0.492", and a length of 1/4". It complies with ASME B18.6.3 manufacturing specifications, ensuring dimensional consistency and performance. Additionally, it is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, supporting safe and sustainable industrial practices.