Value Collection 427225MSC M8 X 1.25 Flange Bolt 16mm Grade 10.9

Product Description

The VALUE COLLECTION 427225MSC is a smooth flange bolt sized M8 x 1.25 metric with a 16 mm length under head and full thread engagement from bearing surface to tip. The integrated smooth flange measures 18 mm in diameter, distributing clamp load across a wider area without requiring a separate washer. Manufactured from Grade 10.9 alloy steel with a phosphate and oil finish, this fastener delivers high tensile strength and baseline corrosion resistance suitable for demanding mechanical assemblies. Drive engagement is through a 12.73 to 13.00 mm hex head. This bolt meets DIN 6921 and DIN ISO 898-1 standards, making it appropriate for engineers and maintenance professionals specifying metric hardware to recognized international tolerances.

This bolt is used in mechanical, industrial, and equipment assembly applications where an M8 metric thread is required and a built-in flange is preferred over a separate flat washer. Fully threaded construction makes it well suited for short-grip applications and thin-material clamping. It is commonly installed in machinery fabrication, equipment mounting, and structural assemblies by millwrights, maintenance technicians, and assemblers working to metric fastener specifications. The phosphate and oil finish provides a degree of corrosion protection during storage and in moderately dry service environments.

Key Features

• M8 x 1.25 metric thread, 16 mm length under head, fully threaded
• 18 mm smooth flange diameter distributes load without a separate washer
• Grade 10.9 alloy steel for high tensile and proof load capacity
• Phosphate and oil finish for baseline corrosion and galling resistance
• Hex drive with 12.73 to 13.00 mm drive size for standard metric wrenching
• Meets DIN 6921 and DIN ISO 898-1 standards

Compatibility

Designed as a standard DIN 6921 metric flange bolt for use in any assembly requiring an M8 x 1.25 fully threaded smooth flange bolt conforming to DIN 6921 and DIN ISO 898-1 dimensional and mechanical standards.

Installation Notes

Install using a metric hex wrench or socket sized to the 12.73 to 13.00 mm drive. Verify mating thread condition and clean threads before installation to avoid galling on the alloy steel finish. Torque to values specified in the applicable engineering design or equipment service documentation for Grade 10.9 M8 fasteners. Do not exceed the rated mechanical grade by substituting higher-grade hardware without engineering review.