Value Collection 534298BR Flat Socket Cap Screw M20x2.5

Product Description

The VALUE COLLECTION 534298BR is a metric flat socket cap screw engineered for applications requiring a flush or countersunk fastener profile. Built to DIN 7991 standard, it features a 90-degree flat head with a hex socket drive and is manufactured from 12.9 grade alloy steel — the highest common tensile grade for metric fasteners — finished in black oxide for mild corrosion resistance and reduced light reflection. The M20x2.5 thread designation indicates a 20 mm nominal diameter with a 2.5 mm thread pitch, and the screw is fully threaded along its 70 mm overall length. Mechanical contractors, millwrights, and industrial maintenance technicians reach for this grade when joint clamping loads demand high-strength hardware in a low-profile head geometry.

This screw is suited for use in machine assemblies, structural jigs, fixtures, and equipment frames where a standard socket cap head would protrude above the mating surface. The flat head seats into a countersunk bore, leaving the fastened surface flush or recessed. Typical applications include CNC machine construction, hydraulic manifold mounting, mold and die work, and heavy equipment fabrication. The black oxide finish makes it a common choice in industrial environments where bright zinc plating is undesirable.

Key Features

• 12.9 alloy steel construction delivers high tensile and proof-load strength for demanding mechanical joints
• 90-degree flat head profile allows flush or countersunk installation where clearance is limited
• Hex socket drive accepts standard metric hex keys and socket bits for high-torque installation in confined spaces
• Fully threaded M20x2.5 shank along the full 70 mm overall length for maximum thread engagement
• Black oxide finish provides mild corrosion resistance and a non-reflective appearance
• Manufactured to DIN 7991 fastener standard for consistent dimensional interchangeability

Compatibility

Designed as an OEM-style replacement or direct-fit metric fastener for any application requiring a DIN 7991 M20x2.5 flat socket cap screw with a 90-degree countersunk head and 12.9 material grade.

Installation Notes

Installation is typically performed by millwrights, machinists, or mechanical technicians using a calibrated torque wrench with the appropriate metric hex key or hex bit socket. Countersunk bores must be machined to the correct 90-degree included angle and diameter per DIN 7991 specifications to achieve proper head seating before applying final torque. At 12.9 grade, fastener preload is substantial — ensure mating material and thread inserts are rated for the clamping forces involved. Always inspect threads for contamination or damage before installation and use appropriate thread lubricant or thread-locking compound as specified by the equipment manufacturer.