S-98885A217 1/4"-28 x 1" ASME B18.3, UL 94 V-0 Plastic Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional thermal stability with a wide operating range from -50° to 500° F, ensuring reliable performance in extreme temperature environments
• Superior chemical resistance thanks to PEEK plastic construction, preventing degradation from harsh industrial chemicals and solvents
• High tensile strength of 25,000 psi provides secure fastening in demanding mechanical applications while maintaining lightweight properties
• Precision Class 2A thread fit with 1/4"-28 UNF fine threads ensures consistent engagement and vibration resistance in critical assemblies
• Flame-retardant UL 94 V-0 certification enhances safety in electrical and electronic applications where fire resistance is crucial
• Standard hex socket drive with 3/16" drive size enables easy installation and removal with common Allen wrenches
• Full regulatory compliance with RoHS 3, REACH, and ASME B18.3 standards ensures environmental responsibility and quality assurance

Professional Applications & Engineering Value

These PEEK plastic socket head cap screws deliver exceptional engineering value in applications where metal fasteners are unsuitable. The beige PEEK material offers outstanding dimensional stability and natural lubricity, preventing galling and seizing in precision equipment. The 1/4-28 UNF fine threads provide superior vibration resistance compared to coarse threads, making them ideal for high-temperature environments up to 500°F in aerospace, semiconductor, and chemical processing equipment. The chemical-resistant properties prevent corrosion from aggressive fluids and cleaning agents, while the non-conductive nature eliminates electrical shorting risks in electronic enclosures and instrumentation. The fully threaded design ensures maximum engagement strength throughout the 1" length, providing reliable clamping force in critical assemblies.

Specification Summary & Compliance

Manufactured to precise inch system measurements with Class 2A thread fit tolerance for consistent performance. These socket head cap screws feature right-hand UNF fine threads with 1/4"-28 specification and comply with ASME B18.3 dimensional standards. The components are fully compliant with RoHS 3 (2015/863/EU) for hazardous substance restrictions, REACH (EC 1907/2006) for chemical safety, and carry UL 94 V-0 flame retardancy certification for enhanced safety in electrical applications.