S-91273A155 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
- Superior corrosion resistance with 18-8 Stainless Steel construction, ideal for harsh industrial environments
- Precise alignment and positioning thanks to the 3/8" shoulder length with tight tolerances for stable component mounting
- High-strength performance with 70,000 psi tensile strength and 35,000 psi minimum shear strength for demanding applications
- Secure and non-slip installation featuring a knurled head and hex socket drive for reliable torque application
- Wide compatibility with UNC coarse threads and Class 2A fit ensuring easy assembly and interchangeability
- Environmental compliance meeting RoHS 3 and REACH standards for safe, regulated use
- Durable and long-lasting with Rockwell B55 hardness providing excellent wear resistance
Professional Applications & Engineering Value
This socket head shoulder screw is engineered to address critical alignment and durability challenges in industrial and mechanical assemblies. The 18-8 Stainless Steel material offers exceptional corrosion resistance, reducing maintenance in moist or chemically aggressive settings. Its 3/8" shoulder length and precise diameter tolerances ensure accurate component positioning, minimizing misalignment and vibration in machinery, pivots, and rotating mechanisms. The knurled head and hex drive allow for secure, slip-free installation, while the 1/4"-20 UNC coarse thread with Class 2A fit provides reliable fastening and easy disassembly. Ideal for applications requiring robust, repeatable performance, this shoulder screw enhances operational reliability and reduces downtime in precision engineering projects.
Specification Summary & Compliance
This shoulder screw adheres to UNC thread standards with a Class 2A thread fit for consistent dimensional accuracy. Key specifications include a shoulder diameter of 1/4" (tolerance: -0.004" to -0.002") and shoulder length of 5/8" (tolerance: -0.005" to 0.005"). It is manufactured to meet RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, ensuring environmental safety and regulatory adherence for industrial use.
