S-97760A841 M12 x 40 mm ASME B18.2.3.1M, ISO 898-1 Left-Hand Threaded Medium-Strength Metric Class 8.8 Steel Hex Head Screws
Left-Hand Threaded Medium-Strength Metric Class 8.8 Steel Hex Head 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 strength and durability with Class 8.8 rating, providing reliable performance in high-stress applications
- Superior corrosion resistance from high-quality steel construction, ensuring long service life in industrial environments
- Secure anti-loosening performance with left-hand threading, ideal for rotating machinery and specialized applications
- Easy installation and removal with external hex drive design, allowing for standard tool compatibility and quick maintenance
- Precise thread engagement with Class 6g fit and coarse 1.75mm pitch, ensuring reliable fastening in various materials
- Full thread coverage along the 40mm length, providing maximum grip strength and load distribution
- Regulatory compliance assurance meeting international standards for quality and environmental safety
Professional Applications & Engineering Value
This M12 left hand hex head screw delivers critical engineering solutions where conventional right-hand threads would loosen under rotational forces. The Class 8.8 steel construction provides exceptional tensile strength (110,000 psi) and Rockwell C21 hardness, making it ideal for heavy machinery, automotive assemblies, and industrial equipment subjected to vibration and high loads. The coarse metric thread with 1.75mm pitch ensures rapid installation and superior holding power in various materials, while the external hex drive accommodates standard wrenches for efficient maintenance. Engineered to ASME B18.2.3.1M specifications, this fully threaded fastener offers reliable performance in demanding applications where reverse-threading prevents accidental disassembly.
Specification Summary & Compliance
This metric hex head screw features precise Class 6g thread fit tolerance and coarse thread spacing (1.75mm pitch) per ISO 898-1 standards. Manufacturing complies with ASME B18.2.3.1M specifications for dimensional accuracy and performance. The product is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, ensuring environmental safety and regulatory adherence for industrial applications worldwide.
