Holo-krome 87003 Flat Socket Cap Screw M3x0.5 Alloy Steel

Product Description

The HOLO-KROME 87003 is a metric flat socket cap screw engineered for high-strength fastening applications where a flush or countersunk profile is required. Manufactured from 12.9 grade alloy steel with a black oxide finish, this screw delivers exceptional tensile strength and moderate corrosion resistance in a compact M3x0.5 thread size. The 90-degree flat head seats fully into a countersunk hole, eliminating protrusion above the mating surface. Drive engagement is provided by a 2.00 mm hex socket, requiring an appropriately sized hex key or Allen driver. Licensed machinists, maintenance technicians, and precision assembly professionals are the primary installers of this fastener.

This flat socket cap screw is suited for use in precision mechanical assemblies, tooling fixtures, machine guarding, and equipment enclosures where a low-profile fastened joint is needed. The M3x0.5 thread and 6.00 mm overall length make it appropriate for thin-section workpieces and tight-clearance applications in both industrial and OEM manufacturing environments. The black oxide finish blends into dark-anodized or painted assemblies and provides mild surface protection in dry or lightly oiled conditions.

Key Features

• 12.9 grade alloy steel construction for high tensile and proof load strength
• 90-degree flat head profile seats flush in standard countersunk holes
• 2.00 mm hex socket drive for precise torque application in tight spaces
• Black oxide finish provides mild corrosion resistance and a low-reflectance appearance
• Thread fit class 4G per ANSI B1.13M and ISO 10642 for consistent metric thread engagement
• M3x0.5 thread with 6.00 mm overall length for thin-section and close-tolerance assemblies

Compatibility

Designed as an OEM-style replacement or service fastener for metric-threaded assemblies requiring a 90-degree countersunk flat socket cap screw with M3x0.5 thread pitch, conforming to ANSI B1.13M and ISO 10642 standards.

Installation Notes

Installation should be performed by qualified mechanical or maintenance technicians familiar with metric fastener standards. Ensure the mating countersink angle matches the 90-degree head geometry before driving to prevent improper seating or galling. A calibrated torque driver or torque wrench with the correct 2.00 mm hex bit should be used to achieve proper clamp load without exceeding the material grade limits. De-energize and lock out any equipment before accessing fastened assemblies in live machinery.