S-99477A620 1/4"-20 x 3/4" 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 thanks to polypropylene construction, ideal for harsh industrial environments
- Reliable thermal performance with a wide operating range from -20°F to 210°F for stable assembly in varying conditions
- Precise Class 2A thread fit ensures consistent engagement and reduces the risk of cross-threading during installation
- Robust hex drive design with 3/16" drive size provides secure tool engagement and minimizes stripping
- Full threading along the 3/4" length offers maximum adjustability and holding power in plastic assemblies
- Compliance with RoHS 3 and REACH regulations guarantees environmental safety and global market acceptance
- Coarse UNC threading enables quick installation and reliable performance in plastic and soft material applications
Professional Applications & Engineering Value
Engineered for demanding industrial settings, these polypropylene socket head cap screws deliver exceptional value in applications where metal fasteners are unsuitable. The off-white plastic material provides inherent resistance to chemicals, moisture, and electrical non-conductivity, preventing galvanic corrosion in mixed-material assemblies. With a standard socket head profile and right-hand UNC threading, these screws ensure easy installation using common hex tools, reducing assembly time and labor costs. The coarse thread spacing and Class 2A fit maintain secure fastening in plastic components, minimizing stress cracking and ensuring long-term reliability in equipment housings, electronic enclosures, and fluid handling systems where thermal stability from -20° to 210°F is critical.
Specification Summary & Compliance
This socket head cap screw features a 1/4"-20 UNC coarse thread with Class 2A thread fit per standard inch system requirements, ensuring dimensional accuracy and interchangeability. The fully threaded 3/4" length and 3/8" head diameter provide consistent fastening performance. Manufactured in compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, these screws meet stringent environmental and safety standards for industrial use.
