S-94355A231 1/4"-20 x 5/16" ASME B18.3 Set Screws
Set 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 corrosion resistance with 18-8 stainless steel construction for long-lasting performance in harsh environments
- Exceptional thread precision with Class 3A fit ensuring reliable, vibration-resistant fastening in critical assemblies
- High-torque installation capability through 1/8" hex drive design, allowing secure tightening without head interference
- Optimized surface engagement with flat tip design that distributes pressure evenly to prevent component damage
- Enhanced mechanical strength with Rockwell B80 hardness providing excellent durability under repeated stress
- Industry-standard compatibility with UNC coarse threads that facilitate quick installation and removal
- Regulatory compliance assurance meeting ASME B18.3 specifications and environmental standards including RoHS 3 and REACH
Professional Applications & Engineering Value
These 1/4-20 UNC Class 3A hex headless set screws deliver critical engineering solutions where space constraints and vibration resistance are paramount. The 18-8 stainless steel composition provides inherent corrosion resistance, making them ideal for machinery, automotive, and electrical enclosures exposed to moisture or chemicals. The flat tip design creates maximum surface contact without marring shafts or components, while the coarse UNC threads maintain holding power in softer materials. With Rockwell B80 hardness, these screws withstand repeated adjustments without thread deformation, ensuring consistent clamping force in precision assemblies and rotating equipment where loosening could cause operational failure.
Specification Summary & Compliance
Manufactured to exact Class 3A thread tolerances with 1/4"-20 UNC coarse threads and right-hand thread direction. Complies with ASME B18.3 dimensional standards and maintains full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. Features 5/16" length with 1/8" hex drive and flat tip configuration for consistent industrial performance.
