S-93386A454 1/4"-20 x 3/8" ASME B18.3 Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 400 Nickel material, ideal for harsh environments and extended service life
• Precise Class 3A thread fit ensures tight, secure fastening with minimal backlash in critical assemblies
• Hex drive headless design allows for flush installation and space-saving in compact machinery
• Cup point tip provides excellent bite and resistance to loosening under vibration
• Coarse UNC threading enables quick installation and reduced cross-threading risk
• Compliance with ASME B18.3 guarantees dimensional accuracy and interchangeability
• RoHS 3 and REACH compliant for environmentally responsible and safe industrial use

Professional Applications & Engineering Value

These 400 Nickel set screws deliver exceptional performance in demanding applications where corrosion resistance and reliability are paramount. The headless hex drive design is perfect for securing collars, pulleys, and gears on shafts without protruding components, while the UNC coarse thread and Class 3A fit provide superior holding power in high-vibration environments like motors, conveyors, and heavy machinery. The cup point tip digs into the shaft surface, preventing slippage and maintaining alignment. Engineered to meet ASME B18.3 standards, these screws ensure precise dimensional consistency, making them ideal for OEM and MRO applications across aerospace, automotive, and industrial equipment sectors.

Specification Summary & Compliance

This set screw features a 1/4"-20 UNC coarse thread with Class 3A fit for high precision, a length of 3/8", and a 1/8" hex drive. Manufactured from 400 Nickel with a cup point tip, it complies with ASME B18.3 dimensional standards and is verified as RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliant for environmental safety.