Value Collection 538306BR M20x2.5 Flat Socket Cap Screw

Product Description

The VALUE COLLECTION 538306BR is a metric flat socket cap screw designed for applications requiring a flush or countersunk fastener profile. Featuring a 90-degree flat head and a 12 mm hex socket drive, it accepts a standard hex key for installation. The M20x2.5 thread and 90 mm overall length make it suited for medium-to-heavy duty structural and mechanical assemblies. Constructed from 18-8 austenitic stainless steel meeting Grade A2 designation, the screw offers corrosion resistance appropriate for both indoor and outdoor environments. The shank is partially threaded, which is typical for load-bearing bolted joints where thread engagement is limited to the nut or tapped section.

This flat socket cap screw is used in general metalworking, fabrication, and mechanical assembly applications where a low-profile countersunk head is required. The DIN 7991 fastener standard ensures dimensional consistency for use in metric-designed assemblies. It is appropriate for machine frames, brackets, guards, and structural panels where flush mounting is necessary. Installers working in food service, marine, or chemical-adjacent environments may prefer the A2 stainless grade for its corrosion resistance compared to carbon steel alternatives.

Key Features

• 90-degree flat head profile allows flush or countersunk installation
• 12 mm hex socket drive for use with standard hex keys or socket drivers
• M20x2.5 metric thread size with partial threading for shear-load joints
• 18-8 austenitic stainless steel, Grade A2, for corrosion resistance
• Conforms to DIN 7991 fastener standard for dimensional accuracy
• 90 mm overall length suits medium-depth countersunk assemblies

Compatibility

Designed as a DIN 7991 standard metric flat socket cap screw in M20x2.5 thread size, compatible with any metric-tapped hole or nut meeting the same thread specification.

Installation Notes

Installation is typically performed by a machinist, millwright, or general tradesperson using a 12 mm hex key or socket driver. Ensure the mating countersunk hole is machined to a 90-degree included angle to match the head geometry. Verify thread engagement depth and torque to the assembly specification; do not over-torque stainless steel fasteners as galling can occur. Applying an anti-seize compound to the threads is recommended when torque consistency is critical.