Value Collection SC4090040 Countersink 90 Deg 3 Flute Hss

Product Description

The VALUE COLLECTION SC4090040 is a single-end, 3-flute countersink designed for right-hand cutting in a wide range of metalworking and fabrication applications. Built from high-speed steel (HSS) with a bright, uncoated finish, it delivers reliable performance when creating clean, chamfered seating surfaces for flat-head fasteners. The tool features a 90-degree included angle — the standard geometry for flat-head screws in metal — and a straight-cylindrical shank for secure chuck retention. At 0.12 pounds, it is lightweight and easy to handle. No pilot is included, making it suited for use in drill presses or hand drills where the operator controls alignment.

This countersink is intended for countersinking operations in metal, wood, and composite materials in both shop and field environments. The 5/8-inch head diameter and 3/8-inch straight shank make it compatible with standard drill chucks found on benchtop drill presses, CNC machines, and portable drills. It is a common tool in machine shops, maintenance departments, and fabrication environments where flush fastener seating is required. The right-hand cutting direction is consistent with standard drill-press and hand-drill operation.

Key Features

• 90-degree included angle (45-degree centerline angle) — standard geometry for flat-head fastener seating in metal
• 3-flute design for smooth, controlled material removal and reduced chatter
• High-speed steel construction for durability across metal and composite workpieces
• Bright, uncoated finish — no coating to chip or flake during operation
• 3/8-inch straight-cylindrical shank fits standard drill chucks without adapters
• Single-end design with no pilot included, allowing flexible alignment control

Compatibility

Designed as a standard-geometry countersink for use in drill presses, CNC drilling operations, and handheld drills equipped with a chuck that accepts a 3/8-inch straight shank.

Installation Notes

Installation and use should be performed by a qualified machinist or tradesperson familiar with rotary cutting tools. Secure the workpiece firmly before beginning the countersinking operation to prevent movement and tool deflection. Verify that the drill chuck is tightened properly around the 3/8-inch shank before running the tool. Run at appropriate speeds for the workpiece material — higher speeds for soft materials, lower speeds for hard metals — and do not force the tool into the cut.