Value Collection 815979PR M20 Hex Cap Screw Grade 8.8 Zinc

Product Description

The Value Collection 815979PR is a metric hex head cap screw engineered for general industrial and structural fastening applications. It features an M20 x 2.50 thread profile with a 75 mm length under head, and is produced from Grade 8.8 steel — a medium-high strength carbon steel alloy with a minimum tensile strength suitable for demanding bolted joint applications. The shank is partially threaded, conforming to DIN 931 and ISO 4014 standards, and the zinc plating provides a baseline level of corrosion resistance. The 30 mm hex drive size accepts standard metric hex wrenches and sockets. Machinists, millwrights, maintenance technicians, and structural installers regularly stock this fastener size for machinery assembly, structural steel work, and equipment maintenance.

This fastener is used across a wide range of industrial, commercial, and light construction settings wherever a partially threaded metric hex cap screw is specified. Typical applications include bolted steel frame assemblies, machine bases, bracket mounting, and equipment retrofits that call for DIN 931 or ISO 4014 compliance. The partial thread shank provides a smooth bearing surface in the grip zone, which is important in shear-loaded joints or connections requiring precise clamping without thread engagement through the full grip length.

Key Features

• M20 x 2.50 metric thread with 75 mm length under head for deep-reach bolted connections
• Grade 8.8 steel construction delivers reliable tensile and proof load performance for structural fastening
• Partially threaded shank per DIN 931 and ISO 4014 standards ensures dimensional consistency
• Zinc-plated finish provides corrosion resistance in standard indoor and sheltered environments
• 30 mm hex drive size is compatible with standard metric impact sockets and box wrenches
• Sold individually, allowing single-unit procurement for repair and maintenance work

Compatibility

Designed as an OEM-style replacement or direct-use fastener for any application specifying a DIN 931 or ISO 4014 partially threaded metric hex cap screw in M20 x 2.50 thread size and 75 mm under-head length.

Installation Notes

Installation is typically performed by machinists, millwrights, or maintenance technicians using a calibrated torque wrench with a 30 mm metric socket. Always verify thread engagement depth and mating nut or tapped hole grade prior to assembly. Clean fastener threads and mating surfaces before installation to ensure accurate torque readings. Follow applicable engineering standards or equipment manufacturer specifications for torque values, as no product-specific torque value is provided here.