S-97768A314 1/4"-20 ASME B18.3 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
- Corrosion-resistant performance with 18-8 stainless steel construction and black oxide finish for extended service life in harsh environments
- Precise component alignment through 1" shoulder length with tight tolerances for accurate positioning in assemblies
- Superior load-bearing capacity with 70,000 psi tensile strength and 35,000 psi shear strength for demanding applications
- Enhanced torque transmission with Class 3A thread fit ensuring secure fastening and vibration resistance
- Easy installation and removal with 5/32" hex socket drive and knurled head for improved grip during handling
- Industry-standard compatibility with UNC coarse threading for reliable engagement in various industrial components
- Regulatory compliance assurance meeting ASME B18.3 specifications and environmental standards including RoHS 3 and REACH
Professional Applications & Engineering Value
This 1/4"-20 UNC shoulder screw delivers exceptional engineering value in precision machinery and industrial equipment where component alignment is critical. The 18-8 stainless steel base material combined with black oxide finish provides superior corrosion resistance, making it ideal for applications exposed to moisture, chemicals, or outdoor conditions. The precisely machined 1" shoulder length with tight diameter tolerance ensures accurate bearing surfaces for rotating components, eliminating misalignment issues in assemblies. With Rockwell B55 hardness and Class 3A thread fit, this fastener maintains dimensional stability under heavy loads while preventing loosening from vibration. The knurled head texture and socket drive facilitate installation in confined spaces, reducing assembly time in automated equipment, robotics, and precision manufacturing systems where reliability is paramount.
Specification Summary & Compliance
This shoulder screw features precision 1/4"-20 UNC coarse threads with Class 3A fit for superior engagement, a 1" shoulder length with tolerance of -0.005" to 0.005", and 5/16" shoulder diameter with tolerance of -0.004" to -0.002". Manufactured in compliance with ASME B18.3 specifications and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations for industrial use.
