S-91273A126 1/4"-20 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, ideal for harsh industrial environments
- High mechanical strength with 70,000 psi tensile and 35,000 psi shear strength for reliable load-bearing performance
- Precise thread engagement through Class 2A UNC coarse threads ensuring consistent fit and reduced assembly time
- Secure installation and removal with hex socket drive and knurled head for enhanced grip and torque application
- Accurate component alignment via 3/8" shoulder length with tight diameter tolerance for stable pivot or spacer functions
- Long-term operational reliability backed by Rockwell B55 hardness for wear resistance in dynamic applications
- Environmental and regulatory compliance with RoHS 3 and REACH standards for safe use in regulated industries
Professional Applications & Engineering Value
Engineered for precision and durability, this 18-8 stainless steel shoulder screw addresses critical challenges in machinery assembly, automation systems, and pivoting mechanisms. The 1/4"-20 UNC coarse thread with Class 2A fit ensures rapid installation and vibration resistance, while the 3/8" shoulder length provides exact alignment for rotating parts or as a precision spacer. The hex socket drive combined with a knurled head facilitates secure tightening in confined spaces, reducing tool slippage. Ideal for high-stress applications such as conveyor systems, robotic arms, and industrial fixtures, its corrosion-resistant properties and high tensile strength minimize maintenance downtime and extend service life in demanding conditions.
Specification Summary & Compliance
This shoulder screw features a 1/4"-20 UNC thread with Class 2A tolerance for precise fit, a shoulder diameter of 1/4" with tolerance of -0.004" to -0.002", and shoulder length of 3/8" with tolerance of -0.005" to 0.005". Manufactured to standard specifications, it complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material integrity for industrial use.
