S-94115A535 1/4"-20 x 3/8" 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
- Secure anti-loosening performance with green nylon 6/6 plastic tip that maintains grip from -50° to 250°F, preventing vibration-induced slippage in demanding environments
- Exceptional thread precision with Class 3A UNC coarse threads ensuring reliable engagement and reduced cross-threading risks during installation
- Superior corrosion resistance through black-oxide coating on alloy steel, extending service life in industrial settings
- Optimized torque transmission via 1/8" hex drive in headless design, allowing flush mounting and high tightening force application
- Enhanced mechanical strength with Rockwell C28 hardness alloy steel construction, resisting deformation under heavy loads
- Broad regulatory compliance meeting ASME B18.3 specifications while satisfying RoHS 3 and REACH environmental standards
- Simplified installation using standard 1/8" hex keys for quick assembly in space-constrained applications
Professional Applications & Engineering Value
This black-oxide alloy steel set screw delivers critical engineering solutions for permanent fastening in machinery, automotive, and precision equipment assemblies. The Class 3A UNC coarse thread configuration ensures rapid installation while maintaining superior thread engagement, particularly valuable in high-vibration environments where nylon 6/6 plastic tips prevent rotational loosening. The headless hex drive design enables flush mounting in counterbored applications while the alloy steel construction with Rockwell C28 hardness provides reliable clamping force without thread stripping. Ideal for securing gears, pulleys, and collars on shafts, this industrial-grade set screw combines precision manufacturing with material durability to solve common assembly challenges in manufacturing and maintenance operations.
Specification Summary & Compliance
Manufactured to ASME B18.3 standards with Class 3A thread fit precision and UNC 1/4"-20 coarse threads. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. Dimensions include 0.25" thread diameter, 3/8" length, and 1/8" hex drive size. The nylon tip measures 0.063" in length with 1/8" diameter, rated for -50° to 250°F temperature range.
