S-91375A115 4-48 x 3/16" ASME B18.3, ASTM F912 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 Alloy Steel construction, extending service life in harsh environments
- Precise Class 3A thread fit ensures tighter tolerances and reliable fastening in high-vibration applications
- Compact 0.050" hex drive allows easy installation in confined spaces with standard tools
- High Rockwell C45 hardness provides excellent wear resistance and maintains thread integrity under load
- Headless design with cup tip delivers secure, flush mounting and minimal protrusion in assemblies
- Fine UNF thread spacing offers improved adjustment precision and resistance to loosening
- Full regulatory compliance meets ASME B18.3, ASTM F912, RoHS 3, and REACH for global supply chain compatibility
Professional Applications & Engineering Value
This 4-48 UNF Class 3A Black-Oxide Alloy Steel set screw is engineered to address critical industrial fastening challenges where space constraints, vibration resistance, and environmental durability are paramount. The headless design and compact 0.050" hex drive enable seamless integration into precision machinery, electronic enclosures, and automotive components without interfering with adjacent parts. The cup tip provides concentrated clamping force, preventing shaft slippage in power transmission systems. With fine thread spacing and Class 3A fit, it maintains positional accuracy in adjusting collars and gears, while the Black-Oxide surface treatment on alloy steel combats oxidation in humid or chemically exposed settings, reducing maintenance downtime and replacement costs.
Specification Summary & Compliance
This set screw features a 4-48 UNF fine thread with Class 3A precision tolerance for superior thread engagement. Manufactured to ASME B18.3 and ASTM F912 specifications, it ensures consistent dimensional accuracy and mechanical performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, guaranteeing adherence to environmental and safety standards for industrial use worldwide.
