Holo-krome 77020 Hex Socket Cap Screw M3 X 0.50 Metric

Product Description

The HOLO-KROME 77020 is a metric hex socket cap screw designed for secure, high-torque fastening in precision assemblies. Sized M3 x 0.50 with a 16 mm length under head, this fastener is fully threaded and driven by a hex socket tool. It is manufactured from Austenitic Grade A4 stainless steel with a bright, uncoated finish, making it well suited for corrosion-resistant applications. Manufactured to ISO 3506-1 and ISO 4762 standards, it delivers consistent dimensional accuracy and mechanical performance. This screw is installed by machinists, millwrights, equipment technicians, and maintenance professionals working on precision mechanical assemblies.

This fastener is appropriate for light-duty to medium-duty mechanical assemblies requiring a small-diameter metric cap screw in corrosion-resistant stainless steel. Common applications include instrument panels, enclosures, pump housings, fluid-handling equipment, and marine or food-service environments where stainless steel is specified. Its full threading along the shank length provides maximum thread engagement in shallow or thin-material applications.

Key Features

• M3 x 0.50 metric thread with 16 mm length under head
• Fully threaded shank for maximum thread engagement
• Austenitic Grade A4 stainless steel construction for corrosion resistance
• Bright, uncoated finish with no added plating or coating
• Hex socket drive for high-torque installation in confined spaces
• Manufactured to ISO 3506-1 and ISO 4762 dimensional and material standards

Compatibility

Designed as an ISO 4762-compliant metric hex socket cap screw for use in assemblies specifying an M3 x 0.50 fully threaded fastener in Grade A4 stainless steel.

Installation Notes

Installation requires a metric hex key or socket driver sized for M3 cap screws. Verify thread engagement depth and material compatibility before installation. Stainless steel fasteners are susceptible to galling during installation — apply an appropriate anti-seize compound when specified by the assembly procedure. Follow applicable equipment manufacturer torque guidance for M3 fasteners in the relevant material substrate.