S-91375A589 5/16"-18 x 1 3/4" 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 Class 3A thread fit ensures secure, vibration-resistant fastening with minimal backlash
• High-strength alloy steel construction with Rockwell C45 hardness provides excellent durability under heavy loads
• Hex drive design allows for easy installation and removal with standard tools in confined spaces
• Cup tip configuration creates positive seating and prevents component slippage during operation
• Full compliance with ASME B18.3 specifications guarantees dimensional accuracy and interchangeability
• RoHS 3 and REACH compliance ensures environmental responsibility and global market acceptance

Professional Applications & Engineering Value

This black-oxide alloy steel set screw delivers exceptional performance in demanding industrial applications where vibration resistance and corrosion protection are critical. The 5/16"-18 UNC coarse threads with Class 3A fit provide superior holding power in machinery, automotive components, and power transmission systems. The headless hex drive design enables flush mounting in space-constrained assemblies, while the cup tip ensures positive engagement with shafts and collars. Manufactured to ASME B18.3 standards, these set screws maintain dimensional consistency for reliable replacement and maintenance cycles across industrial equipment.

Specification Summary & Compliance

This set screw features 5/16"-18 UNC coarse threads with Class 3A precision fit and 1 3/4" length. The black-oxide alloy steel construction provides Rockwell C45 hardness for enhanced durability. Manufactured in compliance with ASME B18.3 specifications (ASTM F912), the fastener meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use in global industrial markets.