S-99477A125 5/16"-18 x 1" ASME B18.3, 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
- Superior chemical resistance with polypropylene construction for reliable performance in corrosive environments
- High tensile strength of 4500 psi provides exceptional load-bearing capacity for demanding applications
- Wide temperature tolerance from -20° to 180°F maintains integrity across various operating conditions
- Precise Class 2A thread fit ensures smooth installation and secure fastening in coarse thread applications
- Standard 1/4" hex drive enables quick installation and removal with common tools
- Full regulatory compliance with ASME B18.3, RoHS 3, and REACH standards for industrial safety
- Non-conductive and corrosion-resistant properties ideal for electrical and chemical processing applications
Professional Applications & Engineering Value
These polypropylene socket head cap screws deliver exceptional value in environments where metal fasteners would corrode or conduct electricity. The chemical-resistant properties of polypropylene make these UNC coarse thread screws ideal for chemical processing equipment, water treatment facilities, and food processing machinery where exposure to harsh substances is common. The 1/4" hex drive combined with the socket head design provides reliable torque transmission while the Class 2A thread fit ensures consistent performance in vibration-prone applications. These industrial plastic fasteners offer excellent insulation properties for electrical enclosures and prevent galvanic corrosion when used with dissimilar materials, making them a versatile solution for multiple engineering challenges.
Specification Summary & Compliance
This 5/16"-18 UNC socket head cap screw features precise Class 2A thread tolerance with coarse thread spacing for reliable engagement. Manufactured to meet ASME B18.3 specifications for dimensional accuracy and performance. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and regulatory adherence for industrial applications worldwide.
