Value Collection 43158 M8x1.25 Flat Socket Cap Screw 12.9

Product Description

The VALUE COLLECTION 43158 is a metric flat socket cap screw designed for applications requiring a low-profile, flush-mount fastening solution. The 90-degree flat head seats flush with or below the mating surface when countersunk, eliminating protrusion in tight clearance assemblies. Manufactured from grade 12.9 alloy steel with a black oxide finish, this screw delivers high tensile strength and moderate corrosion resistance. The M8x1.25 thread is fully threaded along the 30 mm overall length. Drive engagement is through a 5 mm hex socket, requiring a matching Allen key or hex bit driver. Installers in mechanical, HVAC bracket, and equipment assembly work rely on this grade for high-load fastening.

This screw is suited for use in metal-to-metal fastening where a flush or countersunk head profile is required. Typical applications include machine frames, HVAC equipment panels, electrical enclosures, pump housings, and structural brackets. The 12.9 material grade meets the demands of high-stress mechanical assemblies. This screw conforms to DIN 7991, making it a direct fit where that fastener standard is specified. Sold individually with a minimum order quantity of 25 pieces per order.

Key Features

• 90-degree flat head seats flush in countersunk holes for a low-profile finish
• Grade 12.9 alloy steel provides high tensile and proof-load strength
• Black oxide finish offers moderate corrosion protection and reduces light reflection
• Fully threaded M8x1.25 shaft along full 30 mm overall length
• 5 mm hex socket drive for standard Allen key or hex bit installation
• Conforms to DIN 7991 fastener standard for metric flat socket cap screws

Compatibility

Designed as a DIN 7991-compliant metric flat socket cap screw for use in any M8x1.25 countersunk threaded application requiring a grade 12.9 fastener.

Installation Notes

Installation is performed with a 5 mm hex key or hex socket bit driver. Ensure the receiving hole is properly countersunk to 90 degrees to achieve full head seating and correct clamp load. Follow equipment manufacturer torque specifications for grade 12.9 M8 fasteners as outlined in applicable mechanical codes. Inspect threads in the mating material for damage before installation to prevent galling or cross-threading.