S-91375A717 4-40 x 1/8" 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 zinc plating that protects against rust in demanding industrial environments
- Exceptional thread precision with Class 3A fit ensuring reliable, vibration-resistant fastening in critical assemblies
- High durability performance from Rockwell C45 hardness alloy steel that maintains integrity under repeated stress
- Space-saving headless design allowing flush mounting where clearance is limited
- Secure hex drive engagement with 0.050" drive size providing positive torque transmission during installation
- Optimized cup tip configuration creating concentrated contact pressure for superior component positioning
- Industry-standard compliance meeting ASME B18.3 specifications for consistent quality and interchangeability
Professional Applications & Engineering Value
This 4-40 UNC set screw delivers exceptional engineering value through its zinc plated alloy steel construction and Class 3A thread fit, specifically designed to address common industrial fastening challenges. The coarse UNC thread profile combined with right-hand threading provides rapid installation in time-sensitive manufacturing environments while maintaining secure positioning of components in machinery, automotive assemblies, and precision equipment. The headless design with hex drive allows for compact installations where space constraints exist, while the cup tip ensures maximum gripping force on shafts, collars, and pulleys. This combination of features makes it ideal for applications requiring reliable, vibration-resistant fastening without protrusion.
Specification Summary & Compliance
This set screw maintains precise Class 3A thread fit according to UNC standards with 4-40 thread size and 1/8" length. Manufacturing complies with ASME B18.3 specifications (ASTM F912) ensuring dimensional accuracy and performance consistency. The product is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting current environmental regulations for industrial use.
