S-91280A991 M18 x 35 mm ISO 4017, DIN 933 Medium-Strength Metric Class 8.8 Steel Hex Head Screws
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
- Superior tensile strength with Class 8.8 rating and 110,000 psi capability for reliable performance in demanding applications
- Enhanced corrosion resistance through zinc plating, extending service life in harsh industrial environments
- Precision thread engagement with Class 6h fit and coarse 2.5mm pitch for faster assembly and secure fastening
- Optimal hardness characteristics with Rockwell C21 rating, providing excellent wear resistance and durability
- Full threading design ensures maximum grip length and uniform stress distribution along the entire fastener
- Standard-compliant manufacturing meeting ISO 4017/DIN 933 specifications for guaranteed interchangeability and quality
- External hex drive design allows for high-torque installation with standard tools, reducing assembly time
Professional Applications & Engineering Value
This M18 hex head screw delivers exceptional engineering value for heavy-duty industrial applications where reliability is paramount. The Class 8.8 steel construction provides the necessary structural integrity for machinery assembly, construction projects, and equipment manufacturing. The coarse metric thread with 2.5mm pitch ensures rapid installation while maintaining secure fastening, significantly reducing assembly time in production environments. The zinc plated finish offers critical protection against corrosion in challenging conditions, extending maintenance intervals and reducing lifecycle costs. With fully threaded design and precise Class 6h thread fit, this fastener distributes clamping forces evenly, preventing joint failure in high-vibration applications common in industrial settings.
Specification Summary & Compliance
This metric hex head screw features M18 x 2.5mm coarse threading with Class 6h thread fit tolerance ensuring precise engagement. Manufactured to ISO 4017/DIN 933 standards for dimensional accuracy and performance consistency. The fastener meets RoHS 3 (2015/863/EU) compliance for restricted substance control and REACH (EC 1907/2006) regulations for chemical safety. With a length of 35mm, external hex drive, and right-hand threading, this Class 8.8 strength grade screw maintains 110,000 psi tensile strength and Rockwell C21 hardness specifications throughout its service life.
