S-91297A583 5/16"-18 x 1" Plastic Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional temperature resistance from -100° to 500°F for reliable performance in extreme thermal environments
• Superior corrosion resistance with PTFE plastic construction, ideal for harsh chemical and moisture-prone applications
• Secure external hex drive design ensures easy installation and removal with standard tools, reducing assembly time
• Precise Class 2A thread fit provides consistent engagement and vibration resistance in industrial assemblies
• Full threading along the 1" length offers maximum grip and load distribution for enhanced fastening integrity
• RoHS 3 and REACH compliance guarantees environmental safety and regulatory adherence for global supply chains
• Lightweight PTFE material reduces overall component weight while maintaining structural durability

Professional Applications & Engineering Value

Engineered for demanding industrial settings, these PTFE plastic hex head screws deliver critical performance where metal fasteners fail. The white PTFE construction inherently resists corrosion from chemicals, solvents, and UV exposure, eliminating galvanic corrosion risks in mixed-material assemblies. With a broad temperature range of -100° to 500°F, they maintain dimensional stability in thermal cycling applications from cryogenic systems to high-heat processing equipment. The 5/16"-18 UNC coarse threads with Class 2A fit ensure rapid installation in plastics and soft metals while providing superior pull-out resistance. These fully threaded screws with external hex drive are particularly valuable in electrical enclosures, chemical processing equipment, food machinery, and semiconductor manufacturing where non-conductive, non-contaminating fasteners are essential.

Specification Summary & Compliance

This hex head screw features precise 5/16"-18 UNC coarse threads with Class 2A thread fit per ASME B1.1 standards, ensuring consistent dimensional accuracy. The 1" length and fully threaded design provide uniform stress distribution. Manufacturing complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming absence of restricted hazardous substances. The PTFE material maintains mechanical properties across the specified temperature range without requiring hardness ratings for most industrial applications.