Value Collection 532531BR M18x2.5 Hex Socket Cap Screw

Product Description

The VALUE COLLECTION 532531BR is a fully threaded hex socket cap screw designed for high-strength fastening applications in industrial, mechanical, and structural assemblies. This screw features an M18 x 2.50 thread profile with a 55 mm length under head, manufactured from alloy steel and finished with a black oxide coating that provides moderate corrosion resistance and reduces light reflection on the fastener surface. It conforms to DIN 912 and ISO 898-1 standards at material grade 12.9, the highest common strength grade for metric socket cap screws, making it suitable for applications where joint integrity and clamping force are critical.

This fastener is used in heavy equipment, machine frames, hydraulic cylinder mounting, tooling fixtures, and structural bolted connections where a recessed hex drive is preferred over external hex or torx profiles. The M18 diameter and 2.50 mm pitch are standard coarse-thread dimensions widely used in European and metric-specification equipment. Machinists, millwrights, and mechanical assembly technicians are the primary installers. Full threading along the shank allows engagement across varying joint depths without an unthreaded grip zone, which is useful in through-bolted and tapped-hole configurations.

Key Features

• M18 x 2.50 coarse thread, fully threaded shank for maximum engagement flexibility
• Grade 12.9 alloy steel construction for high tensile and proof load capacity
• Black oxide finish provides mild corrosion resistance and a consistent dark appearance
• Hex socket drive reduces tool clearance requirements in tight installations
• Meets DIN 912 and ISO 898-1 fastener standards for dimensional and mechanical compliance
• 55 mm length under head suits a range of joint stack thicknesses

Compatibility

Designed as an OEM-style and general-purpose replacement or supplemental fastener for any M18 x 2.50 tapped hole or through-hole application requiring a DIN 912 hex socket cap screw at grade 12.9.

Installation Notes

Installation should be performed by a qualified millwright, machinist, or mechanical technician using a calibrated torque wrench and the appropriate metric hex key or socket bit sized for M18 socket cap screws. Always confirm the tapped hole thread class and depth are compatible with M18 x 2.50 before installation. De-energize, de-pressurize, and lock out all affected equipment before removing or installing structural fasteners. Do not substitute a lower grade fastener in a joint originally engineered for grade 12.9 without engineering review.