S-90505A391 M3 x 25 mm DIN 965 Sealing Stainless Steel Phillips Flat Head Screws

Key Features & Benefits at a Glance

• Superior sealing performance with silicone rubber O-rings that withstand extreme temperatures from -80° to 400° F, preventing leaks in demanding environments.
• Exceptional corrosion resistance provided by 316 stainless steel construction, ideal for harsh industrial and marine applications.
• High-pressure reliability with a maximum pressure rating of 6000 psi, ensuring secure fastening under intense mechanical stress.
• Precision threading with Class 6g fit and M3 x 0.5 mm coarse thread for easy installation and consistent, vibration-resistant connections.
• Optimized head design featuring an undercut flat head and 90° countersink angle for a flush, low-profile finish that reduces snagging.
• Broad compliance with DIN 965 standards, RoHS 3, and REACH, guaranteeing safety and regulatory adherence for global industrial use.
• Versatile Phillips drive (No. 1 size) enables quick assembly with common tools, boosting efficiency in maintenance and production lines.

Professional Applications & Engineering Value

This M3 flat head sealing screw is engineered to address critical challenges in industrial applications where pressure integrity and environmental resistance are paramount. Made from 316 stainless steel, it excels in corrosive settings like chemical processing, marine equipment, and food machinery, preventing failure due to rust or chemical exposure. The integrated silicone rubber O-ring creates a reliable seal against fluids and gases, supporting operations up to 6000 psi—ideal for hydraulic systems, pumps, and enclosures. The fully threaded design with Class 6g metric coarse thread ensures uniform load distribution and ease of insertion, while the undercut flat head minimizes protrusion for streamlined assemblies. By combining DIN 965 compliance with high-strength materials, this screw reduces maintenance downtime and enhances longevity in precision engineering projects.

Specification Summary & Compliance

This screw adheres to precise metric dimensions: M3 thread size with 0.5 mm pitch, 25 mm length, and Class 6g thread fit for consistent performance. It meets DIN 965 specifications for flat head screws, ensuring dimensional accuracy and interoperability. Regulatory compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), confirming the absence of hazardous substances for safe use in various industries. The design incorporates a 90° countersink angle and undercut profile per standard requirements, supporting reliable fastening in engineered systems.