S-91239A148 M4 x 12 mm ISO 7380 Steel Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Exceptional durability with Class 10.9 high-strength alloy steel construction, ensuring reliable performance in demanding applications
• Superior corrosion resistance from the black-oxide surface treatment, extending service life in harsh industrial environments
• Secure and efficient installation with a 2.5mm hex drive and fully threaded coarse pitch design for quick, vibration-resistant fastening
• Optimized load distribution thanks to the rounded button head profile, reducing surface damage and stress concentration
• Precise thread fit with Class 6g tolerance and M4 x 0.7mm coarse thread, ensuring consistent engagement and reduced cross-threading risks
• High mechanical reliability backed by 140,000 psi tensile strength and Rockwell C32 hardness for heavy-duty use
• Global compliance assurance meeting ISO 7380, RoHS 3, and REACH standards for safe, regulated industrial deployment

Professional Applications & Engineering Value

These M4 button head screws are engineered to address common industrial challenges such as vibration loosening, corrosion-induced failure, and assembly inefficiency. The black-oxide alloy steel construction provides a robust barrier against moisture and chemicals, making them ideal for machinery, automotive, and outdoor equipment where environmental resistance is critical. With a fully threaded coarse pitch and hex drive, they enable rapid installation and high clamp force retention, reducing maintenance downtime. The Class 10.9 strength grade ensures they withstand dynamic loads and stress cycles, offering long-term reliability in structural and mechanical assemblies. Their ISO 7380 compliance guarantees dimensional accuracy and interchangeability, streamlining procurement and inventory management for B2B buyers.

Specification Summary & Compliance

This fastener adheres to precise metric dimensions: M4 x 0.7mm thread with Class 6g fit and 12mm length. Manufacturing follows ISO 7380 for rounded head screws, ensuring consistent quality and performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming the absence of restricted substances. Strength and hardness are certified to Class 10.9 with tensile strength of 140,000 psi and Rockwell C32 hardness, meeting international standards for high-strength industrial fasteners.