Value Collection 43137 M5x0.8 Flat Socket Cap Screw 12.9

Product Description

The VALUE COLLECTION 43137 is a flat socket cap screw engineered for applications requiring a flush or countersunk fastener profile. Built from grade 12.9 alloy steel with a black oxide finish, this screw delivers high tensile strength and moderate corrosion resistance in a compact, low-profile head design. The 90-degree flat head seats flush into countersunk holes, and the hex socket drive accepts a 3 mm hex key for installation. Thread size is M5x0.8 metric, with an overall length of 12 mm and fully threaded shank. Mechanical and industrial technicians reach for this fastener when clearance is tight and a protruding head is not acceptable.

This screw is suited for precision machinery, tooling fixtures, jigs, equipment panels, and other metalworking or industrial assembly applications where a flush-mount fastener is required. The metric thread standard and DIN 7991 fastener standard make it a common specification in imported equipment, CNC machinery, and fabricated assemblies. The black oxide finish provides a clean appearance and light surface protection in dry or lightly oiled environments. Sold individually with a minimum order quantity of 25 units.

Key Features

• Grade 12.9 alloy steel construction for high tensile and proof load strength
• 90-degree flat head seats flush in countersunk holes to eliminate protrusion
• 3 mm hex socket drive for standard hex key installation
• Fully threaded M5x0.8 shank, 12 mm overall length
• Black oxide finish for light corrosion resistance and reduced light reflection
• Conforms to DIN 7991 fastener standard

Compatibility

Designed as a metric-standard countersunk socket cap screw per DIN 7991, suitable for M5x0.8 threaded holes in metal fabrication, machinery, and precision assembly applications.

Installation Notes

Installation is performed with a 3 mm hex key or hex-bit driver. De-energize and lock out any equipment before fastener replacement or assembly. Ensure the mating countersink angle matches 90 degrees to achieve full head seating and proper clamp load. Do not use impact drivers on grade 12.9 fasteners without confirming torque control, as over-torquing can cause brittle fracture in high-strength alloy steel.