Value Collection 427221MSC M8 X 1.25 Flange Bolt 12mm

Product Description

The VALUE COLLECTION 427221MSC is a metric smooth flange bolt designed for applications requiring a built-in bearing surface without the need for a separate washer. The flange distributes clamping load across a wider area, reducing the risk of surface damage or pull-through in softer base materials. Built to Grade 10.9 alloy steel, this bolt delivers high tensile strength suitable for demanding fastening scenarios. The phosphate and oil finish provides moderate corrosion resistance and aids in controlled torque application during assembly. With an M8 x 1.25 thread and a fully threaded 12 mm length under head, it suits compact joint stacks. Installed by machinists, maintenance technicians, and mechanical assemblers.

This bolt is suited for general industrial assembly, machinery maintenance, automotive fabrication, and structural mechanical joints where metric fasteners are specified. The smooth flange face is appropriate where a clean bearing surface is required and serrations would be undesirable. The 18 mm flange diameter and fully threaded shank make it a practical choice for through-bolted or tapped-hole applications in metal fabrication and equipment assembly environments that call out DIN 6921 or DIN ISO 898-1 compliance.

Key Features

• M8 x 1.25 metric thread with 12 mm fully threaded length under head
• Grade 10.9 alloy steel construction for high tensile and proof load capacity
• 18 mm smooth flange diameter distributes clamping load without a separate washer
• Phosphate and oil finish for moderate corrosion resistance and consistent torque behavior
• Meets DIN 6921 and DIN ISO 898-1 standards for dimensional and mechanical compliance
• Hex drive with 12.73 to 13 mm drive size for standard metric tooling

Compatibility

Designed as a DIN 6921 compliant smooth flange bolt for metric fastening applications specifying M8 x 1.25 thread pitch and Grade 10.9 mechanical properties.

Installation Notes

Installation should be performed by a qualified mechanic or assembler familiar with metric fastener torque specifications for Grade 10.9 hardware. Use a calibrated torque wrench and the appropriate metric hex socket or wrench sized to the 12.73 to 13 mm drive. Verify the mating thread condition and ensure the tapped hole or nut meets compatible strength grade requirements before final torque. Do not mix with inch-standard fasteners or substitute lower-grade hardware in Grade 10.9-specified joints.