S-91221A171 2-56 x 3/16" UL 94 HB Plastic Socket Head Screws
Plastic Socket Head Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Exceptional temperature resistance from -20° to 230°F ensures reliable performance in demanding thermal environments without degradation
- Superior durability with glass-filled nylon construction provides excellent strength-to-weight ratio and resistance to corrosion and chemicals
- Precision Class 2A thread fit guarantees consistent engagement and secure fastening in industrial applications
- Standard UNC coarse threading (2-56) enables quick assembly and disassembly while maintaining vibration resistance
- 5/64" hex socket drive design offers secure tool engagement and prevents stripping during high-torque applications
- Comprehensive compliance certification including UL 94 HB flammability rating, RoHS 3, and REACH ensures safety and environmental responsibility
- Right-hand threading with fully threaded design provides maximum grip length and uniform clamping force distribution
Professional Applications & Engineering Value
These glass-filled nylon socket head cap screws deliver exceptional engineering value in applications where metal fasteners are unsuitable. The black plastic construction offers inherent electrical insulation and corrosion resistance, making them ideal for electronics enclosures, medical devices, and food processing equipment. The 2-56 UNC coarse threads with Class 2A fit ensure reliable performance in vibration-prone environments while the 5/64" hex drive provides secure tool engagement without cam-out. The material's temperature resistance from -20° to 230°F maintains dimensional stability across diverse operating conditions, solving common thermal expansion issues in precision assemblies. These socket head screws are particularly valuable in industries requiring non-conductive, non-magnetic, and chemically resistant fastening solutions.
Specification Summary & Compliance
This socket head cap screw features precise Class 2A thread fit according to UNC standards with 2-56 thread size and coarse thread spacing. Manufacturing complies with UL 94 HB flammability specifications for plastic materials. The product is fully RoHS 3 (2015/863/EU) compliant and meets REACH (EC 1907/2006) requirements regarding substance restrictions, ensuring environmental responsibility and regulatory adherence for global industrial applications.
