S-91381A074 2-56 x 1/8" 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 corrosion resistance through black-oxide coating on alloy steel, extending service life in demanding industrial environments
- Precise Class 3A thread fit ensures tight tolerances and reliable engagement for vibration-resistant assemblies
- Non-marring brass tip protects sensitive surfaces while maintaining secure clamping force
- Compact 1/8" length provides space-saving solutions for confined assembly applications
- Hex drive compatibility with standard 0.035" tools for straightforward installation and removal
- High-strength construction with Rockwell C28 hardness maintains dimensional stability under load
- Regulatory compliance meets ASME B18.3 specifications and environmental standards (RoHS 3, REACH)
Professional Applications & Engineering Value
This 2-56 UNC set screw delivers exceptional engineering value through its specialized material combination and precision manufacturing. The black-oxide alloy steel body provides excellent corrosion resistance while maintaining the Rockwell C28 hardness required for high-strength applications. The soft brass tip is engineered to prevent surface damage on expensive components while ensuring secure fastening, making it ideal for precision equipment, electronics assembly, and machinery where component protection is critical. The coarse UNC thread spacing combined with Class 3A thread fit ensures rapid installation and reliable performance in vibration-prone environments. These industrial set screws solve common assembly challenges by balancing clamping security with surface protection, particularly valuable in aerospace, automotive, and precision manufacturing applications where both performance and component integrity are paramount.
Specification Summary & Compliance
This precision fastener maintains Class 3A thread fit tolerances with UNC thread form and 2-56 thread size specifications. Manufacturing complies with ASME B18.3 standards for dimensional accuracy and performance requirements. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global industrial markets. The combination of alloy steel construction with black-oxide surface treatment provides both corrosion resistance and consistent performance in demanding applications.
