S-91381A617 3/8"-16 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
- Enhanced corrosion resistance with black-oxide finish for reliable performance in demanding industrial environments
- Superior thread engagement with Class 3A fit ensuring precise, vibration-resistant fastening in critical applications
- Non-marring brass soft tip protects sensitive surfaces while providing excellent grip and alignment
- High-strength alloy steel construction with Rockwell C28 hardness for exceptional durability and load-bearing capacity
- Space-saving headless design with 3/16" hex drive for easy installation in confined spaces
- Coarse UNC threads provide quick assembly and disassembly while maintaining secure holding power
- Full regulatory compliance meeting ASME B18.3 standards and environmental regulations for global industrial use
Professional Applications & Engineering Value
This black-oxide alloy steel set screw delivers exceptional engineering value in precision machinery, automotive components, and industrial equipment where vibration resistance and reliable positioning are critical. The combination of Class 3A thread fit and coarse UNC threads ensures secure fastening even under dynamic loads, while the brass soft tip prevents damage to shafts, gears, and precision components. The headless design with hex drive allows for flush mounting in space-constrained applications, making it ideal for collars, pulleys, and coupling applications where traditional fasteners would interfere with operation. The Rockwell C28 hardness provides optimal balance between strength and machinability, ensuring long-term performance in demanding industrial environments.
Specification Summary & Compliance
Manufactured to exacting ASME B18.3 standards with Class 3A thread fit for superior dimensional accuracy and interchangeability. Features 3/8"-16 UNC coarse threads with right-hand direction and precise thread spacing. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use in global industrial markets. The black-oxide alloy steel construction meets industry standards for corrosion resistance and mechanical performance.
