Value Collection 42803 M20x2.5 Hex Socket Cap Screw 120mm

Product Description

The VALUE COLLECTION 42803 is a partially threaded hex socket cap screw with an M20 x 2.50 mm thread profile and a 120 mm length under head. Manufactured from alloy steel to a 12.9 material grade, it delivers high tensile strength suitable for demanding mechanical assemblies. The black oxide finish provides a base level of corrosion resistance and reduces light reflection on exposed fastener heads. Drive engagement is via a hex socket, requiring an appropriate hex key or Allen-type driver bit. This fastener meets DIN 912 and ISO 898-1 standards and is commonly installed by millwrights, mechanical contractors, and maintenance technicians in industrial and commercial settings.

This screw is suited for high-load bolted joint applications where a recessed socket drive is preferred over an external hex head. Typical uses include machinery frames, structural brackets, hydraulic component mounting, and equipment assemblies that require a flush or countersunk fastener profile. The 12.9 material grade makes it appropriate for applications with elevated clamping force requirements where lower-grade fasteners would not meet design specifications.

Key Features

• M20 x 2.50 mm thread size for high-load mechanical assemblies
• 120 mm length under head, partially threaded for precise clamp load control
• Alloy steel construction at 12.9 material grade for superior tensile strength
• Black oxide finish for corrosion resistance and reduced surface reflection
• Hex socket drive for use with standard Allen keys or hex bit drivers
• Meets DIN 912 and ISO 898-1 fastener standards

Compatibility

Designed as a standard DIN 912 and ISO 898-1 compliant M20 x 2.50 mm hex socket cap screw suitable for metric-threaded applications requiring a 12.9 grade partially threaded fastener.

Installation Notes

Installation should be performed by a qualified mechanic or technician familiar with metric fastener torque requirements for 12.9 grade alloy steel hardware. Always verify thread engagement depth and ensure the mating threaded hole or nut is rated for the applied clamping load. Apply appropriate thread lubricant or dry-torque values per the equipment manufacturer specifications. Do not mix metric and imperial fasteners in the same joint.