S-91381A621 3/8"-16 x 5/8" 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
- Enhanced surface protection with brass soft tip to prevent damage to mating components during installation
- Superior holding power from Class 3A thread fit ensuring tight, vibration-resistant connections in demanding applications
- Exceptional durability with Rockwell C28 hardness Black-Oxide Alloy Steel construction resisting wear and corrosion
- Secure installation via hex drive design providing reliable torque transmission without head interference
- Industry-standard compatibility with UNC coarse threads offering broad interchangeability across equipment
- Regulatory compliance assurance meeting ASME B18.3, RoHS 3, and REACH standards for global industrial use
- Optimized engagement through right-hand thread direction facilitating standard assembly procedures
Professional Applications & Engineering Value
This 3/8"-16 UNC set screw delivers critical engineering solutions for industrial fastening applications where component slippage or positional drift can compromise system integrity. The Black-Oxide Alloy Steel construction with Rockwell C28 hardness provides exceptional resistance to vibrational loosening and environmental degradation, while the integrated brass soft tip prevents marring of precision shafts, gears, and collars without sacrificing clamping force. Engineered with Class 3A thread fit and coarse thread spacing, this headless hex drive set screw maintains precise alignment in high-stress assemblies across machinery, automotive, and manufacturing equipment, ensuring reliable performance where standard fasteners fail.
Specification Summary & Compliance
This set screw maintains Class 3A thread fit per UNC standards with 3/8"-16 coarse thread spacing and right-hand thread direction. Manufacturing complies with ASME B18.3 specifications for dimensional accuracy and performance. The product is verified RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting international regulatory requirements for hazardous substance restrictions.
