Value Collection 43141 M5x0.8 Flat Socket Cap Screw 12.9

Product Description

The VALUE COLLECTION 43141 is a metric flat socket cap screw engineered for applications requiring a flush or countersunk fastener profile. Built to DIN 7991, it features an M5x0.8 thread with a 3.00 mm hex socket drive and a 90-degree flat head that sits flush with the mating surface when fully seated. The screw is fully threaded along its 30 mm overall length and manufactured from grade 12.9 alloy steel, delivering high tensile strength suitable for demanding mechanical assemblies. The black oxide finish provides a baseline level of corrosion resistance and reduces light reflection in precision equipment applications. This fastener is installed by machinists, millwrights, and maintenance technicians using a standard 3 mm hex key.

This screw is suited for use in metal fabrication, machine building, jig and fixture construction, and general industrial assembly where a low-profile countersunk head is required. The M5x0.8 metric thread and DIN 7991 standard make it a common choice in European-specification equipment and machinery. It is fully threaded, so it engages the full length of a tapped hole or nut, providing maximum thread contact in thin-material applications. The minimum order quantity is 25 pieces per order.

Key Features

• Grade 12.9 alloy steel construction provides high tensile and shear strength
• 90-degree flat head with hex socket drive allows flush countersunk installation
• M5x0.8 metric thread conforming to DIN 7991 fastener standard
• 3.00 mm hex socket drive compatible with standard metric hex keys
• Fully threaded along the entire 30 mm overall length
• Black oxide finish for mild corrosion resistance and low-reflectance appearance

Compatibility

Designed as a DIN 7991 metric flat socket cap screw for use in any M5x0.8 tapped hole or through-hole application requiring a countersunk 90-degree flat head profile.

Installation Notes

Install using a 3.00 mm hex key or hex bit driver; ensure the mating surface is countersunk to a 90-degree angle to achieve proper head seating. Grade 12.9 fasteners should be torqued per the applicable engineering specification for the assembly — do not substitute with lower-grade fasteners in high-load joints. Clean and inspect the tapped hole before installation to prevent galling or cross-threading. Black oxide finish offers minimal corrosion protection; apply a compatible thread lubricant or anti-seize compound in corrosive environments if required by the application.