S-91273A619 5/16"-24 Shoulder Screws
Shoulder Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Exceptional corrosion resistance with 18-8 stainless steel construction and black oxide finish, ideal for harsh industrial environments
- Superior load-bearing capacity with 70,000 psi tensile strength and 35,000 psi shear strength for reliable performance under stress
- Precise alignment and smooth rotation enabled by the 1 1/4" shoulder length with tight diameter tolerance for consistent assembly
- Secure installation and removal with hex socket drive and knurled head design preventing tool slippage during torque application
- Fine thread accuracy with Class 2A UNF threads ensuring vibration resistance and leak-proof connections in dynamic applications
- Enhanced durability from Rockwell B55 hardness providing excellent wear resistance and long service life
- Regulatory compliance assurance meeting RoHS 3 and REACH standards for safe use in global markets
Professional Applications & Engineering Value
This black oxide 18-8 stainless steel shoulder screw delivers critical engineering solutions where precision shaft alignment and rotational stability are paramount. The 5/16"-24 UNF fine thread with Class 2A fit maintains secure fastening in high-vibration equipment like robotics, conveyor systems, and precision machinery. The knurled socket head combined with hex drive ensures reliable torque transmission during assembly, while the 1 1/4" shoulder length provides accurate component spacing and reduces bearing wear. Manufactured from corrosion-resistant 18-8 stainless steel with black oxide finish, it withstands demanding environments including automotive assemblies and industrial automation, offering maintenance-free performance and extended operational life.
Specification Summary & Compliance
This precision shoulder screw features 5/16"-24 UNF fine threads with Class 2A thread fit per ASME standards, ensuring consistent dimensional accuracy. The shoulder diameter maintains a tight tolerance of -0.004" to -0.002" with shoulder length tolerance of -0.005" to 0.005" for precise engineering applications. Manufacturing complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, guaranteeing environmental safety and material traceability.
