S-90289A130 4-48 x 1/8" ASME B18.3 Set Screws
Set Screws
Image may differ from product. See technical specification for details.
Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
Key Features & Benefits at a Glance
- Superior corrosion resistance with black-oxide coating, extending service life in demanding industrial environments
- Exceptional thread precision with UNF Class 3A fit, ensuring reliable, vibration-resistant fastening in critical assemblies
- High-strength durability from Rockwell C45 hardened alloy steel, maintaining clamp force under heavy loads
- Secure, flush mounting with headless design and cup tip, preventing component damage while maximizing contact pressure
- Effortless installation using standard 0.050" hex tools, reducing assembly time and tooling costs
- Fine thread spacing for enhanced adjustment precision and superior holding power in thin-section materials
- Full regulatory compliance with ASME B18.3, RoHS 3, and REACH, ensuring global acceptance and environmental safety
Professional Applications & Engineering Value
This 4-48 UNF Class 3A set screw delivers critical engineering solutions for precision assemblies requiring minimal protrusion and maximum reliability. The black-oxide alloy steel construction provides essential corrosion protection while maintaining Rockwell C45 hardness for sustained clamp force in high-vibration applications. Engineered with fine thread spacing and Class 3A thread fit, it eliminates backlash in sensitive mechanical systems, from aerospace controls to medical device manufacturing. The headless design with cup tip concentrates pressure precisely, preventing shaft damage while the 0.050" hex drive ensures secure tool engagement during installation. These features make it ideal for permanent fastening in robotics, precision instruments, and automotive subsystems where space constraints and vibration resistance are paramount.
Specification Summary & Compliance
This set screw maintains UNF Class 3A thread tolerances with 4-48 fine threading and 1/8" length for precision fit. Manufactured to ASME B18.3 specifications with full compliance to RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. The right-hand thread direction and cup tip configuration meet industry standards for reliable performance in mechanical fastening applications.
