Value Collection MP4557 M6x1 Smooth Flange Bolt 40mm 10-pack

Product Description

The VALUE COLLECTION MP4557 is a smooth flange bolt designed for metric fastening applications requiring a clean bearing surface and positive load distribution. The integral smooth flange eliminates the need for a separate washer by spreading clamp load across a 14.2 mm flange diameter. Built from Grade 10.9 alloy steel with a zinc-plated finish, this bolt delivers high tensile strength with basic corrosion resistance. The M6 x 1.0 thread pitch and 40 mm length under head make it suitable for medium-duty assemblies. Partial threading with 20 mm of thread engagement is standard. Conforms to JIS B 1189.

This bolt is used across light industrial, mechanical, and equipment assembly applications where metric fasteners are specified. The hex drive accepts a 9.78 to 10.0 mm socket or wrench. Partially threaded shanks are preferred in assemblies where the unthreaded section must pass through a clearance hole without thread engagement in that layer, providing better shear resistance and precise positional control. Sold in a package of 10 units.

Key Features

• Grade 10.9 alloy steel construction provides high tensile and proof load ratings
• Smooth flange diameter of 14.2 mm distributes clamp load without a separate washer
• M6 x 1.0 metric thread with 20 mm thread length for controlled engagement depth
• Partial threading preserves a smooth shank section for shear-loaded clearance holes
• Zinc-plated finish offers basic corrosion resistance in dry or low-humidity environments
• Conforms to JIS B 1189 fastener standard for dimensional consistency

Compatibility

Designed as an OEM-style metric flange bolt for use in any assembly calling out an M6 x 1.0 partially threaded smooth flange bolt per JIS B 1189.

Installation Notes

Installation is performed with a standard hex socket or open-end wrench sized to the 9.78 to 10.0 mm drive. Verify mating thread condition and clearance hole sizing before assembly. Apply fastener torque per the Grade 10.9 specification for M6 threads as defined in your engineering standards or applicable JIS guidelines. Do not mix with inch-series hardware or non-metric tapped holes.