S-90271A535 1/4"-20 x 3/8" ASME B18.6.3 Steel Truss Head Slotted Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction, extending service life in harsh industrial environments
• Enhanced load distribution from the wide truss head design, reducing surface pressure and material damage
• Reliable fastening performance with fully threaded UNC coarse threads ensuring quick installation and strong holding power
• Precision thread fit meeting Class 2A standards for consistent engagement and vibration resistance
• Durable mechanical strength backed by Rockwell B69 hardness, maintaining integrity under heavy loads
• Broad compatibility with standard slotted drivers, simplifying maintenance and assembly processes
• Regulatory compliance assurance with ASME B18.6.3, RoHS 3, and REACH standards for safe global use

Professional Applications & Engineering Value

Engineered for demanding industrial applications, this 1/4"-20 UNC zinc-plated steel truss head slotted screw addresses critical challenges in assembly durability and environmental resistance. The zinc-plated finish provides a robust barrier against oxidation and chemical exposure, ideal for outdoor equipment, automotive components, and machinery subjected to moisture or temperature variations. Its wide rounded truss head distributes clamping force effectively across softer materials, preventing surface deformation while the coarse UNC threading ensures rapid installation and secure fastening in wood, metal, and plastic substrates. With full threading and Class 2A fit, it maintains consistent torque performance in high-vibration environments, reducing maintenance frequency and downtime in production lines, electrical enclosures, and structural frameworks.

Specification Summary & Compliance

This fastener features a 1/4"-20 UNC coarse thread with Class 2A tolerance for precise fit and reliable performance. Manufactured in accordance with ASME B18.6.3 specifications, it ensures dimensional accuracy and mechanical consistency. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, guaranteeing environmental safety and unrestricted use in international markets.