S-93856A311 M8 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
- High mechanical strength offering 70,000 psi tensile strength and Rockwell B55 hardness for reliable load-bearing applications
- Precision thread fit with Class 5g6g tolerance ensuring secure, vibration-resistant connections in assemblies
- Easy installation and removal thanks to the hex socket drive and knurled head for enhanced grip
- Accurate shoulder positioning with tightly controlled shoulder diameter tolerance for precise component alignment
- Versatile length options available from 6mm to 49.75mm to accommodate various design requirements
- Environmental compliance meeting RoHS 3 and REACH standards for safe use in regulated industries
Professional Applications & Engineering Value
This M8 shoulder screw is engineered to address critical alignment and durability challenges in industrial machinery. The 18-8 stainless steel material provides excellent resistance to rust and chemical exposure, making it ideal for food processing, automotive, and marine applications where moisture is present. The hex socket drive combined with the knurled head ensures secure tool engagement and reduces slippage during high-torque installation. With its Class 5g6g metric thread and precisely machined shoulder, this fastener maintains component positioning under dynamic loads, preventing misalignment in rotating assemblies like bearings, gears, and pulleys. The 1.25mm coarse pitch thread allows for quicker assembly while maintaining strong holding power in demanding mechanical systems.
Specification Summary & Compliance
This shoulder screw features M8 x 1.25mm coarse pitch metric threads with Class 5g6g thread fit per ISO standards. Shoulder diameter tolerance is maintained at -0.072 to -0.01 mm with shoulder length tolerance of -0.05 to 0.05 mm for precision alignment. The fastener is manufactured from 18-8 stainless steel with Rockwell B55 hardness and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance requirements for restricted substance control.
