S-94115A103 4-40 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
- Precision thread fit with Class 3A tolerance ensures secure fastening and vibration resistance in demanding applications
- Surface protection from the green nylon 6/6 plastic tip prevents damage to mating components while maintaining grip
- Wide temperature resilience with tip performance from -50° to 250°F for stable operation in varied industrial environments
- Enhanced corrosion resistance through black-oxide coating on alloy steel, extending service life in harsh conditions
- High-strength construction with Rockwell C28 hardness provides reliable holding power without deformation
- Space-saving headless design allows flush mounting where clearance is limited
- Standardized compatibility with UNC coarse threads and hex drive for easy installation with common tools
Professional Applications & Engineering Value
This 4-40 UNC set screw delivers critical engineering solutions for precision assembly challenges. The black-oxide alloy steel construction combined with Class 3A thread fit provides exceptional clamping force and vibration resistance in machinery, automotive, and electronics applications. The nylon 6/6 plastic tip eliminates surface marring on shafts, gears, and collars while maintaining consistent performance across extreme temperature ranges from -50° to 250°F. The headless design with hex drive enables compact installations in confined spaces where traditional fasteners cannot be used. These set screws are engineered to prevent loosening under dynamic loads while protecting expensive components from damage during adjustment and maintenance cycles.
Specification Summary & Compliance
Manufactured to ASME B18.3 specifications with UNC coarse threads and Class 3A thread fit for precision dimensional accuracy. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. Features include 4-40 thread size, 1/8" length, 0.050" hex drive, and right-hand thread direction with Rockwell C28 hardness rating.
