S-91244A593 5/16"-18 x 2 1/2" Plastic Hex Head Screws

Key Features & Benefits at a Glance

• Excellent corrosion resistance for long-lasting performance in humid or chemical environments without rusting
• Secure external hex drive provides reliable torque transmission and prevents tool slippage during installation
• Wide temperature tolerance from -40°F to 185°F maintains structural integrity in both freezing and elevated heat conditions
• Electrical insulation properties make these screws ideal for electrical assemblies where conductivity must be avoided
• Lightweight nylon construction reduces overall component weight while maintaining strength for industrial applications
• Precision Class 2A thread fit ensures consistent engagement and reliable fastening in assembly operations
• RoHS 3 compliance meets environmental regulations for use in regulated industries and international markets

Professional Applications & Engineering Value

These nylon hex head screws deliver critical engineering advantages where metal fasteners would compromise performance. The off-white nylon plastic construction provides inherent corrosion resistance, eliminating galvanic corrosion issues in multi-material assemblies and making them perfect for electrical enclosures, marine equipment, and food processing machinery. The UNC coarse thread design with Class 2A fit ensures rapid installation and reliable holding power in plastic, wood, and soft metal substrates. With partial threading, these screws provide optimal clamp force distribution while the external hex drive allows for high-torque installation without stripping. The material's natural lubricity prevents galling and seizing, even after repeated disassembly cycles.

Specification Summary & Compliance

This 5/16"-18 x 2-1/2" nylon hex head screw features UNC coarse threads with precision Class 2A thread fit according to inch system standards. The partially threaded design provides a minimum thread length of 7/8" with right-hand threading direction. Manufactured from durable nylon plastic with off-white coloration, these screws maintain dimensional stability across the specified temperature range of -40°F to 185°F. The product is fully RoHS 3 (2015/863/EU) compliant for environmental safety and restricted substance management.