S-99934A210 4-40 x 1/8" ASME B18.3 Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction for long-term reliability in harsh environments
• Precise thread engagement through Class 3A fit ensuring secure fastening and vibration resistance
• Exceptional durability with Rockwell B80 hardness maintaining structural integrity under repeated use
• Easy installation and removal via 0.050" hex drive design allowing efficient maintenance access
• Optimized for confined spaces with headless configuration and compact 1/8" length
• Reliable holding power from UNC coarse threads providing strong mechanical locking
• Industry compliance assurance meeting ASME B18.3 standards for consistent performance

Professional Applications & Engineering Value

These 4-40 UNC set screws deliver critical engineering solutions where space constraints and corrosion resistance are paramount. The 18-8 stainless steel composition provides excellent protection against oxidation and chemical exposure, while the Class 3A thread fit ensures precise alignment and eliminates play in precision assemblies. The headless design with hex drive allows flush mounting in applications where protruding fasteners are impractical, making them ideal for machinery components, electronic enclosures, and precision instruments. The coarse UNC threads provide superior resistance to vibrational loosening, while the silver tip material enhances seating in demanding industrial applications requiring repeated adjustments.

Specification Summary & Compliance

Manufactured to exacting ASME B18.3 specifications with Class 3A thread fit tolerances for precision alignment. Features 4-40 UNC coarse threads with right-hand direction and 1/8" length. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global industrial markets.