S-91273A313 3/8"-16 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
- Superior corrosion resistance with 18-8 stainless steel construction for long-lasting performance in harsh environments
- Precise component alignment ensured by the 1-1/2" shoulder with tight ±0.005" length tolerance
- High mechanical strength delivering 70,000 psi tensile and 35,000 psi shear strength for demanding applications
- Enhanced grip and tool engagement from the knurled hex socket head design
- Reliable thread performance with Class 2A fit UNC coarse threads for easy assembly and vibration resistance
- Compliance with environmental regulations including RoHS 3 and REACH for global market acceptance
- Consistent hardness at Rockwell B55 providing excellent wear resistance and durability
Professional Applications & Engineering Value
This 18-8 stainless steel shoulder screw is engineered to solve critical alignment challenges in precision machinery and industrial equipment. The 3/8"-16 UNC coarse thread with Class 2A fit ensures reliable fastening while the precisely machined shoulder provides accurate component positioning in rotating assemblies, pivoting mechanisms, and bearing applications. The knurled hex socket head offers superior torque transmission and prevents tool slippage during installation. With its high tensile strength and corrosion-resistant properties, this fastener maintains structural integrity in demanding environments including automation systems, manufacturing equipment, and precision instruments where dimensional stability and long-term reliability are paramount.
Specification Summary & Compliance
This shoulder screw features Class 2A thread fit per UNC standards with precise shoulder diameter tolerance of -0.004" to -0.002" and shoulder length tolerance of ±0.005". Manufactured from 18-8 stainless steel with Rockwell B55 hardness, the fastener complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring suitability for global industrial applications requiring strict material compliance and dimensional precision.
