S-90289A365 3/8"-24 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
- Superior Vibration Resistance: Fine UNF threads and Class 3A fit ensure a tight, secure connection that resists loosening under dynamic loads.
- Enhanced Durability & Corrosion Protection: Black-oxide finish on alloy steel provides excellent resistance to wear and environmental corrosion, extending service life.
- High-Strength Fastening: Rockwell C45 hardness offers reliable mechanical strength for demanding industrial applications.
- Secure Anti-Rotation Locking: Cup tip design and serrations provide maximum grip and prevent component slippage.
- Space-Saving & Flush Installation: Headless hex drive allows for compact assemblies and easy access with a 3/16" hex key.
- Precision Manufacturing: Complies with ASME B18.3 standards for consistent dimensions and reliable performance.
- Environmental & Safety Compliance: Meets RoHS 3 and REACH regulations, ensuring safe use in regulated industries.
Professional Applications & Engineering Value
This black-oxide alloy steel set screw is engineered to address critical challenges in precision machinery and heavy-duty equipment. Its Class 3A thread fit and fine UNF threading deliver exceptional clamping force and vibration resistance, preventing joint failure in high-stress environments. The cup tip and serrations bite securely into shafts and collars, eliminating rotational play in pulleys, gears, and couplings. With a Rockwell C45 hardness, it maintains integrity under repeated torque and load, while the headless hex drive design allows for flush mounting in confined spaces. Ideal for automotive, aerospace, and manufacturing assemblies, this screw ensures long-term reliability where precision alignment and secure locking are paramount.
Specification Summary & Compliance
This set screw features a 3/8"-24 UNF fine thread with Class 3A fit for high precision and a right-hand thread direction. It is manufactured from alloy steel with a black-oxide surface treatment and meets ASME B18.3 dimensional standards. Compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring it is free from hazardous substances and suitable for global industrial use.
