Holo-krome 76574 Hex Socket Cap Screw M24 X 3.00 Alloy Steel

Product Description

The HOLO-KROME 76574 is a metric hex socket cap screw designed for high-strength bolted assemblies requiring precise torque and a low-profile head. It carries an M24 x 3.00 thread size with a 140 mm (approximately 5.51 inches) length under head and is partially threaded, making it well suited for applications where the unthreaded shank must bear shear loads. The fastener is manufactured from alloy steel to material grade 12.9, the highest standard strength class for metric fasteners, and is finished with a black oxide coating for moderate corrosion resistance. It is installed using a hex socket drive. Mechanical and structural contractors, millwrights, and maintenance technicians install this screw where high clamp loads and reliable joint integrity are required.

This screw is commonly used in heavy machinery, industrial equipment, structural assemblies, and precision mechanical fixtures. The M24 x 3.00 thread profile and 12.9 grade alloy steel construction make it appropriate for applications demanding high tensile and proof load values. The partial threading provides a full-shank bearing surface between mating components, which is important in joints subject to lateral forces or vibration. The black oxide finish is suitable for indoor environments and components that receive additional lubrication or sealant treatment.

Key Features

• M24 x 3.00 metric thread - partially threaded for shear load bearing
• Grade 12.9 alloy steel construction for maximum tensile and proof load performance
• Black oxide finish provides moderate corrosion resistance and reduces light reflection
• Hex socket drive allows high-torque installation in confined spaces
• Conforms to ANSI B1.13M, DIN 912, ISO 4762, and ISO 898-1 fastener standards

Compatibility

Designed as a standard metric hex socket cap screw per DIN 912 and ISO 4762, compatible with M24 x 3.00 tapped holes and standard metric hex socket tooling in industrial, structural, and machinery applications.

Installation Notes

Installation should be performed by a qualified mechanic or millwright using a calibrated torque wrench and a properly sized hex socket bit rated for high-torque fastener work. Always clean and inspect the tapped hole before installation to ensure thread integrity. Follow the equipment manufacturer's torque specification for grade 12.9 M24 fasteners; applying incorrect torque can result in joint failure or fastener fracture. Thread lubrication practices should conform to the applicable engineering specification for the assembly.