Value Collection 43142 M5x0.8 Flat Socket Cap Screw

Product Description

The VALUE COLLECTION 43142 is a metric flat socket cap screw designed for applications requiring a flush or countersunk fastener profile. Built to DIN 7991 standards from 12.9 grade alloy steel with a black oxide finish, this screw delivers high tensile strength in a low-profile hex socket drive configuration. The 90-degree flat head seats fully into countersunk holes, keeping the fastener surface flush with the mating material. The 3.00 mm hex socket drive accepts a standard hex key. This fastener is a staple in precision mechanical assemblies, tooling fixtures, and machine construction where head clearance is limited.

The 43142 flat socket cap screw is suited for metric fastener applications across industrial machinery, manufacturing equipment, jigs, and mechanical fixtures. Its partially threaded shank provides accurate shank-to-bore fit in clearance holes, which helps maintain positional alignment under load. The M5x0.8 thread size and 35 mm overall length make it a common choice for medium-duty machine assembly tasks. Mechanical assemblers and maintenance technicians working on metric-standard equipment will find this screw appropriate for countersunk bolt patterns requiring high clamp load.

Key Features

• DIN 7991 standard — meets metric fastener dimensional requirements for flat socket cap screws
• 12.9 grade alloy steel construction — high tensile and proof load strength for demanding mechanical joints
• Black oxide finish — provides mild corrosion resistance and reduces light reflection in precision assemblies
• 90-degree flat head profile — seats flush in countersunk holes, eliminating head protrusion
• 3.00 mm hex socket drive — compatible with standard metric hex keys and drivers
• Partially threaded shank — allows controlled shank fit in clearance holes for positional alignment

Compatibility

Designed as a DIN 7991 metric flat socket cap screw for use in countersunk applications requiring an M5x0.8 thread and 35 mm overall length in metric-standard assemblies.

Installation Notes

Installation is performed with a 3.00 mm hex key or hex socket driver. Ensure the countersunk hole angle matches the 90-degree flat head geometry before driving to prevent head damage or improper seating. De-energize and lock out any machinery before replacing fasteners in powered equipment, following applicable OSHA lockout/tagout procedures. Do not exceed the rated torque specification for M5 grade 12.9 fasteners as published in your assembly documentation.