S-91381A369 3/8"-24 x 3/4" 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 surface protection with black-oxide coating that resists corrosion and extends service life in demanding industrial environments
- Exceptional thread precision with Class 3A fit ensuring reliable, vibration-resistant fastening in critical assemblies
- Enhanced component protection through integrated brass soft tip that prevents damage to mating surfaces during clamping
- Optimized torque transmission with hex drive design providing secure tool engagement and reduced cam-out risk
- High-strength performance from alloy steel construction with Rockwell C28 hardness for maximum durability under load
- Fine thread advantage offering improved adjustment precision and superior holding power compared to coarse threads
- Headless design efficiency enabling flush mounting in space-constrained applications while maintaining full clamping force
Professional Applications & Engineering Value
This black-oxide alloy steel set screw delivers exceptional engineering value in precision assembly applications where component protection and vibration resistance are paramount. The 3/8"-24 UNF fine thread configuration with Class 3A thread fit ensures superior clamping force retention in pulleys, gears, and collars subjected to rotational forces. The integrated brass soft tip eliminates marring and galling on shafts and precision components while maintaining consistent clamping pressure. Engineered with Rockwell C28 hardness, this headless set screw withstands repeated adjustment cycles without deformation, making it ideal for maintenance-intensive industrial equipment, automotive assemblies, and precision machinery where reliable positioning is critical.
Specification Summary & Compliance
Manufactured to exacting ASME B18.3 standards with Class 3A thread fit precision and UNF fine thread specifications (3/8"-24). Features include 3/4" length, 3/16" hex drive, right-hand thread direction, and comprehensive compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. The black-oxide surface treatment on alloy steel substrate provides consistent corrosion resistance while maintaining dimensional stability across industrial applications.
