S-92944A127 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 for long-lasting performance in harsh environments.
- Precise component alignment ensured by the 1-1/2" shoulder with tight diameter tolerance for reliable machinery assembly.
- High load-bearing capacity with 70,000 psi tensile strength and 35,000 psi shear strength for demanding applications.
- Secure fastening and easy installation using the hex drive and coarse UNC thread, reducing assembly time.
- Consistent thread engagement with Class 3A fit for vibration resistance and reduced loosening risks.
- Durable surface and structural integrity from Rockwell B55 hardness, minimizing wear and deformation.
- Compliance with environmental regulations including RoHS 3 and REACH, ensuring safe industrial use.
Professional Applications & Engineering Value
This 18-8 stainless steel shoulder screw is engineered to address critical alignment and durability challenges in industrial settings. The 1-1/2" precision shoulder provides a stable pivot or bearing surface, essential for machinery where components must rotate or slide without misalignment. Its 1/4"-20 UNC coarse thread and Class 3A fit ensure quick, secure fastening even in high-vibration environments, reducing maintenance needs. The hex drive flat head allows for easy installation with standard tools, streamlining assembly processes. Ideal for applications like precision instruments, conveyor systems, and automotive assemblies, this screw's high tensile strength and corrosion-resistant material make it a reliable choice for extending equipment lifespan and minimizing downtime.
Specification Summary & Compliance
This shoulder screw adheres to UNC thread standards with a Class 3A thread fit for precise tolerance. Key dimensions include a shoulder diameter of 5/16" with a tolerance of -0.004" to -0.002" and a shoulder length of 1-1/2" with a tolerance of -0.005" to 0.005". It meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, ensuring it is free from hazardous substances for industrial use.
