S-94105A105 4-40 x 3/16" 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
- Exceptional holding power with Class 3A thread fit for secure, vibration-resistant fastening in demanding applications
- Superior corrosion resistance provided by the black-oxide finish on alloy steel, extending service life in harsh industrial environments
- Optimized installation torque through the 0.050" hex drive design, preventing tool slippage and ensuring proper seating
- Enhanced durability from Rockwell C45 hardness, maintaining thread integrity under repeated use and high stress
- Reliable alignment and positioning with flat tip design, distributing clamping force evenly without damaging component surfaces
- Broad compatibility with UNC coarse threading (4-40), facilitating quick assembly and disassembly in various machinery
- Space-saving headless construction allowing flush mounting where clearance is limited, ideal for compact assemblies
Professional Applications & Engineering Value
This 4-40 UNC set screw delivers critical performance in precision assemblies requiring secure component positioning. The black-oxide alloy steel construction combined with Rockwell C45 hardness ensures exceptional resistance to wear and environmental degradation, addressing common failure points in vibrating machinery and exposed industrial equipment. Its hex drive and Class 3A thread fit provide consistent clamping force without stripping, while the coarse thread spacing enables rapid installation in production environments. Engineered for shaft collars, gears, and pulleys, this headless set screw maintains reliable torque retention where space constraints prohibit traditional fastener heads, making it indispensable in automotive, aerospace, and manufacturing applications demanding repeatable precision.
Specification Summary & Compliance
This set screw maintains Class 3A thread fit per UNC standards with 4-40 thread size and coarse thread spacing, ensuring precise dimensional accuracy. Manufactured in compliance with ASME B18.3 specifications (ASTM F912) for consistent quality and performance. The product is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting international environmental and safety regulations for industrial components.
