S-91375A650 3/8"-24 x 1 1/2" ASME B18.3, ASTM F912 Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with black-oxide coating, extending service life in harsh industrial environments
• Precise thread engagement with Class 3A UNF fine threads ensuring reliable, vibration-resistant fastening
• High-strength durability from alloy steel construction with Rockwell C45 hardness for heavy-duty applications
• Secure installation with hex headless design and 3/16" drive, allowing flush mounting and high torque application
• Enhanced grip with cup tip design that digs into mating surfaces to prevent component slippage
• Industry compliance meeting ASME B18.3 specifications for dimensional accuracy and performance standards
• Environmental responsibility with RoHS 3 and REACH compliance for safe use in regulated industries

Professional Applications & Engineering Value

This black-oxide alloy steel set screw delivers exceptional engineering value in applications requiring secure component positioning and alignment. The UNF fine thread configuration with Class 3A tolerance provides superior thread engagement in precision machinery, reducing the risk of vibration-induced loosening in motors, gears, and rotating assemblies. The hex headless design enables flush installation where protruding fastener heads would interfere with adjacent components. The cup tip creates positive engagement with shaft surfaces, preventing relative movement in pulley systems, couplings, and collars. Manufactured to ASME B18.3 specifications, this set screw maintains dimensional consistency for reliable performance in automotive, aerospace, and industrial equipment applications where corrosion resistance and high-strength fastening are critical.

Specification Summary & Compliance

This set screw features 3/8"-24 UNF fine threads with Class 3A thread fit for precision engagement, manufactured to ASME B18.3 dimensional standards. The 1-1/2" length and 3/16" hex drive provide consistent installation characteristics. Compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring suitability for global industrial applications requiring restricted substance compliance.