S-91381A729 5/8"-11 x 1 1/4" 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
- Exceptional holding power with Class 3A thread fit ensuring tight, secure fastening in demanding applications
- Superior corrosion resistance provided by the black-oxide finish on alloy steel, extending service life in harsh environments
- Surface protection through the integrated brass soft tip, preventing damage to expensive components during installation
- High strength durability with Rockwell C28 hardness, maintaining performance under heavy loads and vibration
- Easy installation and removal with the 5/16" hex drive and headless design, ideal for confined spaces
- Reliable coarse threading using 5/8"-11 UNC specification for quick assembly and reduced cross-threading risk
- Regulatory compliance assurance meeting ASME B18.3 standards and environmental regulations including RoHS 3 and REACH
Professional Applications & Engineering Value
This 5/8"-11 UNC set screw delivers critical engineering solutions for industrial applications where vibration resistance and component protection are paramount. The black-oxide alloy steel construction provides excellent corrosion resistance while maintaining the Rockwell C28 hardness needed for high-strength requirements. The integrated brass soft tip prevents marring and damage to precision-machined surfaces, making it ideal for securing gears, pulleys, and collars on shafts without compromising the integrity of expensive equipment. The coarse UNC threading and Class 3A thread fit ensure rapid installation and reliable performance in heavy machinery, automotive assemblies, and manufacturing equipment where vibration loosening is a common concern.
Specification Summary & Compliance
This set screw features precision 5/8"-11 UNC coarse threads with Class 3A thread fit for superior dimensional accuracy. Manufacturing complies with ASME B18.3 specifications for consistent quality and performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across various industrial sectors.
