Value Collection 42801 Hex Socket Cap Screw M20 X 2.50

Product Description

The VALUE COLLECTION 42801 is a metric hex socket cap screw designed for high-strength fastening applications in mechanical assemblies, industrial equipment, and structural connections. This screw features an M20 x 2.50 thread profile with a 40 mm length under head and is fully threaded along its shank. It is manufactured from alloy steel to a Grade 12.9 material specification, delivering high tensile strength suitable for demanding load-bearing joints. The black oxide coating provides a measure of corrosion resistance and reduces surface reflectivity. Installation requires a hex key or socket driver. Maintenance technicians, millwrights, and mechanical contractors are the typical installers.

This fastener is suited for use in industrial machinery, heavy equipment, hydraulic assemblies, and structural steel applications where high clamp load and vibration resistance are required. The M20 x 2.50 thread size is a coarse metric thread commonly found in European and metric-standard equipment. The fully threaded shank maximizes thread engagement in blind holes and through-bolt applications. It conforms to DIN 912 and ISO 898-1 fastener standards, making it a direct fit in any assembly specifying those standards.

Key Features

• Grade 12.9 alloy steel construction for high tensile and proof load capacity
• M20 x 2.50 fully threaded shank with 40 mm length under head
• Hex socket drive for high-torque installation in confined spaces
• Black oxide finish for moderate corrosion resistance and low-glare appearance
• Conforms to DIN 912 and ISO 898-1 fastener standards

Compatibility

Designed as a DIN 912 and ISO 898-1 compliant replacement or service fastener for any assembly specifying an M20 x 2.50 Grade 12.9 hex socket cap screw.

Installation Notes

Installation should be performed by a qualified millwright, mechanical technician, or maintenance professional using a calibrated torque wrench and the appropriate metric hex key or socket. De-energize and lock out all equipment before fastener replacement or assembly work. Do not mix metric and unified thread fasteners in the same assembly. Grade 12.9 fasteners should not be substituted with lower-grade hardware without engineering review.