Metric Blue UST194947 Button Socket Cap Screw M3x0.50

Product Description

The METRIC BLUE UST194947 is a metric button socket cap screw engineered for precision fastening in tight-clearance applications. Sized at M3x0.50 with a 20mm length under head, this fully threaded fastener is manufactured from Grade 10.9 alloy steel and finished with a blue phosphate coating for corrosion resistance. The low-profile button head reduces snag points in assemblies where a standard hex cap head would interfere with adjacent components. The 2mm hex socket drive allows for installation with a standard hex key or Allen driver in confined spaces. Licensed tradespeople and assembly technicians working on mechanical, electrical, or HVAC equipment will find this fastener appropriate for structural and non-structural metric fastening tasks.

This fastener is suited for residential and commercial equipment assembly, panel mounting, bracket attachment, and component securing where metric M3 threading is specified. The Grade 10.9 rating indicates high tensile strength appropriate for load-bearing connections in steel and metal assemblies. The button head profile conforms to ISO 7380, making it interchangeable in applications that specify that standard. It is commonly used in HVAC equipment enclosures, electrical control panel assembly, and general trade fabrication work.

Key Features

• M3x0.50 thread size with 20mm length under head - fully threaded for maximum grip in thin materials
• Grade 10.9 alloy steel construction for high tensile strength in metal-to-metal fastening
• Blue phosphate finish provides corrosion inhibition in interior and semi-exposed applications
• Low-profile button head minimizes clearance requirements in tight assemblies
• 2mm hex socket drive compatible with standard hex keys and Allen drivers
• Conforms to ISO 7380 fastener standard for reliable dimensional interchangeability

Compatibility

Designed as an OEM-style metric replacement fastener for applications specifying M3x0.50 thread pitch, ISO 7380 button socket cap screws in Grade 10.9 alloy steel.

Installation Notes

Installation is performed with a 2mm hex key or Allen driver. Ensure mating threads are clean and free of debris before driving. Follow applicable torque specifications for Grade 10.9 M3 fasteners as defined by your project or equipment service documentation. Do not mix metric and imperial fasteners in the same threaded bore.