Value Collection 427353MSC M8 X 1.25 Flange Bolt 50mm Grade 10.9

Product Description

The VALUE COLLECTION 427353MSC is a metric smooth flange bolt designed for applications requiring a broad bearing surface without a separate washer. The integrated flange distributes clamp load across a wider area, reducing the risk of surface damage or fastener pull-through. Built from Grade 10.9 alloy steel with a phosphate and oil finish, this bolt delivers high tensile strength and corrosion resistance suitable for demanding mechanical assemblies. The hex drive accepts a 12.73 to 13.00 mm wrench or socket. Partial threading allows the unthreaded shank to bear shear loads in close-tolerance bores.

This flange bolt suits industrial maintenance, machine assembly, automotive, and general mechanical applications where metric fasteners conforming to DIN 6921 and DIN ISO 898-1 are specified. The smooth flange face is appropriate for installations where the mating surface must not be marred by a serrated flange. It is commonly installed by maintenance technicians, millwrights, and assembly professionals working with metric hardware standards.

Key Features

• M8 x 1.25 metric thread with 30 mm thread length and 50 mm length under head
• Smooth 18 mm flange diameter provides wide bearing surface without a separate washer
• Grade 10.9 alloy steel for high tensile and proof load capacity
• Phosphate and oil finish improves corrosion resistance and lubricity during installation
• Partially threaded shank handles shear loads in precision bores
• Conforms to DIN 6921 and DIN ISO 898-1 standards

Compatibility

Designed as a DIN 6921 compliant M8 x 1.25 metric smooth flange bolt suitable for standard metric threaded assemblies requiring Grade 10.9 alloy steel fasteners.

Installation Notes

Installation should be performed by qualified mechanical or maintenance personnel using a 12.73 to 13.00 mm hex wrench or socket. Apply torque gradually and evenly, following the fastener torque specifications provided by the equipment manufacturer or applicable engineering standards for Grade 10.9 M8 fasteners. Ensure mating threads are clean and free of debris before installation. Do not reuse fasteners that show signs of deformation, corrosion, or thread damage.