Hertel K008530AS Straight Flute Tap 1/2-20 Unf Hss

Product Description

The HERTEL K008530AS is a straight flute tap designed for cutting internal threads in a 1/2-20 UNF configuration across a range of metalworking and maintenance applications. Built from high-speed steel with a bright, uncoated finish, this tap delivers reliable performance in ferrous and non-ferrous materials. It features 4 straight flutes, a plug chamfer, a 3B class of fit, and an H3 thread limit, making it well suited for through-hole and blind-hole threading where chip evacuation is managed manually or with cutting fluid. The right-hand thread orientation is standard for most shop and field threading tasks.

This tap is used in general machining, fabrication, and maintenance-repair-operations work where 1/2-20 UNF threads are required. Straight flute taps are a shop-floor staple for threading operations in cast iron, aluminum, brass, and softer steels. The plug chamfer provides a 3 to 5 thread lead-in, making it suitable as a general-purpose starting tap or for through-hole applications. Machinists, tool-and-die workers, and maintenance technicians commonly specify this style when threading with a tap wrench, drill press, or CNC tapping cycle.

Key Features

• 1/2-20 UNF right-hand thread form with 3B class of fit
• 4 straight flutes for balanced chip load in through-hole and blind-hole applications
• Plug chamfer with H3 thread limit for accurate thread sizing
• High-speed steel construction for durability across a range of workpiece materials
• Bright, uncoated finish compatible with standard cutting oils and fluids
• 3.375 inches overall length for use in standard tap holders and wrenches

Compatibility

Designed as a standard replacement or stock tap for 1/2-20 UNF threading operations in general machining and MRO environments.

Installation Notes

Straight flute taps should be installed in a properly sized tap wrench, tapping head, or CNC holder rated for the tap shank diameter. Always back off the tap periodically to break chips and apply appropriate cutting fluid for the workpiece material. Ensure the tap is aligned perpendicular to the workpiece surface before engagement to prevent thread damage or breakage. Worn or misaligned taps should be replaced before use to maintain 3B fit tolerances.