Value Collection 534038PR M4x0.7 Flat Socket Cap Screw

Product Description

The VALUE COLLECTION 534038PR is a metric flat socket cap screw engineered for applications where a flush or countersunk fastener profile is required. Built to DIN 7991 standard, this screw features a 90-degree flat head with a hex socket drive and is manufactured from 12.9-grade alloy steel for high tensile strength. The black oxide finish provides moderate corrosion resistance and reduces light reflection. The M4x0.7 thread with a 40 mm overall length is partially threaded. This fastener is suited for precision assemblies in mechanical, industrial, and equipment manufacturing environments where a flush surface is critical.

This screw is used in metal-to-metal and metal-to-plastic assemblies where the fastener head must sit flush with or below the mating surface. Typical applications include machine frames, tooling fixtures, jigs, enclosures, and precision mechanical components. The 12.9 material grade makes it appropriate for high-stress joints that require maximum clamping force in a compact fastener profile. Installation is performed by machinists, millwrights, and mechanical assemblers using standard metric hex key tooling.

Key Features

• DIN 7991 standard for consistent dimensional compliance
• 12.9-grade alloy steel for high tensile and proof load capacity
• 90-degree flat head profile allows flush or countersunk seating
• Hex socket drive (2.50 mm) for precise torque application in tight spaces
• Black oxide finish for mild corrosion resistance and low-reflectance appearance
• Partially threaded shank for controlled clamping in through-hole applications

Compatibility

Designed as an OEM-style metric fastener replacement or new installation screw for assemblies requiring DIN 7991-compliant M4 flat socket cap screws with a 90-degree countersink profile.

Installation Notes

Installation requires a 2.50 mm hex key or ball-end driver rated for 12.9-grade fasteners. Ensure the mating countersink angle matches the 90-degree head geometry before installation to avoid galling or improper seating. Always confirm thread engagement depth meets engineering requirements before applying final torque. Follow applicable machinery and equipment manufacturer torque specifications for M4 class 12.9 fasteners.