S-91375A091 3-48 x 3/16" ASME B18.3, ASTM F912 Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with black-oxide coating, extending service life in demanding environments
• Exceptional holding power from Rockwell C45 hardness, preventing stripping under high torque
• Precise Class 3A thread fit ensures tight, secure fastening with minimal backlash
• Easy installation and removal with 0.050" hex drive, compatible with standard tools
• Reliable positioning via cup tip design, minimizing component slippage
• Broad industrial compatibility with 3-48 UNC coarse threads for quick assembly
• Regulatory peace of mind with full compliance to ASME, RoHS 3, and REACH standards

Professional Applications & Engineering Value

This black-oxide alloy steel set screw delivers critical performance in applications where vibration resistance and positional accuracy are paramount. The headless design with hex drive allows flush mounting in tight spaces, while the Class 3A UNC coarse threads provide rapid installation and high clamp force retention. Engineered with Rockwell C45 hardness, it resists deformation under repetitive torque cycles in machinery, automotive, and precision equipment assemblies. The black-oxide surface treatment significantly reduces oxidation in humid or mildly corrosive operational environments, ensuring long-term fastener integrity without requiring additional coatings.

Specification Summary & Compliance

Manufactured to ASME B18.3 specifications with precise Class 3A thread fit and 3-48 UNC coarse threading. Dimensions include 3/16" length, 0.050" hex drive, and cup tip configuration. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, containing no restricted substances per the latest SVHC list.