S-95289A347 1/4"-20 x 3/4" ASME B18.3, ASTM F912 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 black oxide coating that protects against rust in demanding industrial environments
- Maximum holding power achieved through Class 3A thread fit, ensuring tight, secure fastening in critical applications
- Enhanced grip and anti-loosening from the extended tip design that digs deeper into mating surfaces
- Exceptional durability with Rockwell C45 hardness alloy steel construction that withstands heavy loads and vibration
- Easy installation and removal using standard 1/8" hex drive tools, reducing assembly time and maintenance costs
- Reliable performance in right-hand coarse UNC threads that provide quick engagement and superior resistance to stripping
- Industry compliance assurance meeting ASME B18.3 specifications for consistent quality and dimensional accuracy
Professional Applications & Engineering Value
This black oxide alloy steel set screw delivers exceptional engineering value in industrial applications where vibration resistance and permanent positioning are critical. The extended tip design creates deeper penetration into shaft components, preventing slippage in high-torque environments like machinery, automotive assemblies, and power transmission systems. Manufactured from alloy steel with Rockwell C45 hardness, it maintains structural integrity under repeated stress cycles. The 1/4"-20 UNC coarse threads combined with Class 3A fit ensure precise engagement with minimal play, while the headless configuration allows for flush mounting in space-constrained applications. This hex drive set screw provides reliable performance in manufacturing equipment, robotics, and precision instruments where component security is paramount.
Specification Summary & Compliance
This set screw features precision 1/4"-20 UNC Class 3A threads with coarse spacing for optimal engagement. Dimensions include 3/4" length with extended tip measuring 0.134" length and 0.156" diameter. Manufactured to ASME B18.3 specifications with full compliance to RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards, ensuring safe use across global industrial markets.
