Holo-krome 76598 Hex Socket Cap Screw M30 X 3.50 Alloy Steel

Product Description

The HOLO-KROME 76598 is a metric hex socket cap screw designed for high-strength fastening applications across industrial, mechanical, and structural assemblies. It features an M30 x 3.50 thread and a 300 mm (11.81 inches) length under head. The fastener is manufactured from alloy steel to material grade 12.9, making it one of the highest-strength classes available in metric fasteners. A black oxide coating provides moderate corrosion resistance and a clean, uniform finish. Drive engagement is via a standard hex socket, requiring a matching hex key or socket bit. This screw is sized for applications demanding high clamping force and precision thread engagement.

This fastener is suited for heavy-duty mechanical assemblies, equipment manufacturing, hydraulic component mounting, and structural connections where high tensile strength and reliable clamp load are required. The M30 x 3.50 coarse-thread profile is commonly found in large-frame machinery, press tooling, and industrial fabrication. Installers in manufacturing maintenance, millwright trades, and mechanical contracting will encounter this size in equipment builds and field repair work.

Key Features

• M30 x 3.50 coarse metric thread for high-clamp-load applications
• 300 mm length under head for deep through-bolt or tapped-hole installations
• Grade 12.9 alloy steel construction for maximum tensile and yield strength
• Black oxide finish for surface protection and low-glare appearance
• Hex socket drive for high-torque installation with standard tooling
• Meets ANSI B1.13M, ISO 4762, and ISO 898-1 fastener standards

Compatibility

Designed as a standard metric hex socket cap screw conforming to ISO 4762 and ANSI B1.13M, compatible with any tapped or clearance hole application requiring an M30 x 3.50 coarse-thread grade 12.9 fastener.

Installation Notes

Installation requires a properly sized hex key or socket drive rated for high-torque use. Always verify that the mating tapped hole meets the appropriate thread class and depth for an M30 fastener before installation. Follow applicable torque specifications from the equipment manufacturer or relevant standards - do not apply torque values not specified for this exact grade and thread. De-energize, depressurize, or otherwise make safe any assembly before replacing structural fasteners.