Value Collection A410391 M5x0.8 Flat Socket Cap Screw 25pk

Product Description

The VALUE COLLECTION A410391 is a metric flat socket cap screw designed for applications requiring a flush or countersunk fastening profile. It features a 90-degree flat head driven by a 3 mm hex socket, and is manufactured from 316 austenitic stainless steel to Grade A4 specification. The M5x0.8 thread pitch and 20 mm overall length make this screw a standard choice in metric assemblies. Partial threading provides full thread engagement in the fastened material while allowing clearance in the through-hole portion. Plumbers, HVAC technicians, electricians, and general trade professionals reach for Grade A4 stainless fasteners where corrosion resistance is a priority.

This screw is suited for metric assemblies in corrosive or wet environments, including marine, chemical, and outdoor installations. The 316 stainless steel composition provides superior resistance to chloride-bearing environments compared to 304-grade fasteners. Packaged in quantities of 25 per pack with a minimum order of one pack, the A410391 is appropriate for both maintenance stock and project-specific purchasing. Applications include equipment panels, pipe supports, enclosures, and mechanical assemblies where a flush-mount fastener is required.

Key Features

• 90-degree flat head for flush or countersunk seating
• 3 mm hex socket drive compatible with standard metric Allen keys and bits
• M5x0.8 thread size conforming to metric thread standard
• Manufactured to DIN 7991 fastener standard
• 316 austenitic stainless steel, Grade A4, for high corrosion resistance
• Partially threaded shank for clearance-hole applications
• Sold in a pack of 25 with a minimum order quantity of 1 pack

Compatibility

Designed as a DIN 7991 compliant metric flat socket cap screw suitable for M5 tapped holes with 0.8 mm thread pitch in corrosion-resistant assemblies.

Installation Notes

Installation requires a 3 mm hex socket driver or Allen key; confirm the mating hole is properly countersunk at 90 degrees to achieve full head seating. Torque to the value specified by the assembly engineer or applicable fastener standard for M5 stainless hardware. When fastening stainless-to-stainless joints, apply an anti-seize compound to the threads to prevent galling. Shut down and de-energize any equipment before accessing fastened panels or enclosures.