Download the PEI (Polyethylenimine) - Ultem
PEI Ultem Hex Head Metric Screws manufactured to ISO 4017 standards are high-performance engineering fasteners designed for applications requiring exceptional mechanical strength, thermal stability, and electrical insulation. Compared to many engineering plastics such as nylon, polypropylene, and polycarbonate, Polyetherimide (PEI Ultem) offers significantly higher heat resistance, greater stiffness, and superior dimensional stability at elevated temperatures. These screws maintain their mechanical properties under demanding thermal and mechanical loads, making them well suited for applications where conventional polymers may soften, creep, or lose strength over time.
The hex head configuration enables easy installation with standard wrenches and socket tools, providing reliable fastening and effective load distribution. PEI hex head screws are widely specified for aerospace components, electronic equipment, semiconductor processing systems, medical instrumentation, electrical applications, and industrial machinery where high strength, dimensional stability, and elevated temperature performance are required.
PEI Ultem is known for its excellent resistance to creep, hydrolysis, and elevated temperatures, making it well suited for precision assemblies operating under mechanical and thermal stress. Combined with its lightweight, non-corrosive, and electrically insulating properties, PEI hex head screws provide a reliable alternative to metal fasteners in critical engineering applications.
Key Features
Available in a range of sizes.
Material: PEI (Polyethylenimine) - Ultem
Max Temperature: 170°C/340°F
Flame Resistance: UL94 V-0
Return components within 90 days for a full refund. Please see our returns terms and conditions for further information.
Properties and applications
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