OSG Countersink: 90°, 1 Flute, 5/8 in Body Dia

An OSG 90° countersink creates a conical recess for flat-head screws in metal, plastic, or composite materials. Its single-flute carbide design delivers fast, chatter-free cutting and a smooth finish. Ideal for precision machining, tool and die work, and aerospace or automotive production where consistent countersink depth and surface quality are critical.

The OSG 700-6252 is a 90° single-flute countersink with a 5/8 in body diameter, made from carbide. It is designed for fast cutting and long tool life in hard materials. The 90° included angle matches standard flat-head screw seats. OSG is the manufacturer, and the part number is 700-6252.

3G Electric supplies OSG countersinks like the 700-6252 to customers worldwide. As a global industrial sourcing partner, we handle full logistics, customs clearance, and delivery to your facility. Contact us for pricing and lead time on this carbide 90° single-flute countersink. We provide genuine OSG tooling for precision machining applications.

Match the countersink angle to your fastener head — 90° is standard for flat-head screws. Choose carbide for hard materials like steel or stainless; HSS for softer alloys. Single-flute designs like the OSG 700-6252 reduce vibration and produce cleaner finishes. Ensure body diameter (5/8 in) clears the hole and allows proper chip evacuation.