S-93140A350 2-56 x 1/8" ASME B18.6.3 Plastic Slotted Flat Head Screws

Key Features & Benefits at a Glance

• Exceptional clarity and corrosion resistance from polycarbonate material for applications requiring visual inspection or aesthetic appeal
• Reliable coarse UNC threading ensures quick installation and secure fastening in plastic and soft materials
• Wide temperature tolerance (-40° to 210°F) maintains structural integrity in diverse operating environments
• Standard 82° countersink angle provides flush mounting for streamlined assemblies and reduced snagging
• Class 2A thread fit delivers consistent, precision mating with standard UNC nuts and threaded components
• Full compliance with ASME B18.6.3 guarantees dimensional accuracy and interchangeability in industrial applications
• RoHS 3 environmental compliance ensures safe use in regulated electronics and consumer products

Professional Applications & Engineering Value

Engineered for precision assemblies requiring both optical clarity and chemical stability, these polycarbonate flat head screws solve critical challenges in electronics enclosures, medical devices, and display systems. The right-hand coarse UNC threading (2-56) combined with Class 2A fit prevents cross-threading during high-speed installation while maintaining vibration resistance. The 82° countersink and slotted drive design enable flush surface mounting that eliminates protrusions in sensitive equipment. With temperature resistance from -40° to 210°F, these clear fasteners perform reliably in thermal cycling environments where metal alternatives would cause galvanic corrosion or thermal expansion issues.

Specification Summary & Compliance

Manufactured to ASME B18.6.3 specifications with Class 2A thread tolerances for consistent UNC threading compatibility. Features standard flat head profile with 0.172" head diameter and 1/8" length. Fully compliant with RoHS 3 (2015/863/EU) regulations for restricted substance control. Thread system conforms to Unified National Coarse (UNC) standards with right-hand orientation and coarse thread spacing.