Hertel K008276AS Straight Flute Tap 10-32 Unf Hss

Product Description

The HERTEL K008276AS is a straight flute tap designed to cut 10-32 UNF internal threads in through-holes and blind holes where chip evacuation is managed manually or with cutting fluid. Built from high-speed steel (HSS) with a bright uncoated finish, this tap delivers reliable performance in ferrous and non-ferrous materials at moderate cutting speeds. The plug chamfer — 3 to 5 threads of lead — provides a gradual thread-cutting entry suitable for through-holes and moderately deep blind holes. With an H7 thread limit, the tap produces threads on the higher tolerance end of the standard range, accommodating plated or coated fasteners. It is sold and packaged as a single unit.

This tap is used in machine shops, maintenance facilities, and field repair applications wherever 10-32 UNF threads need to be cut or restored. It fits standard tap handles and machine tap holders for hand tapping or low-speed machine tapping operations. Common applications include threading holes in light steel, aluminum, brass, and similar machinable materials for small fastener assemblies. The right-hand thread direction suits standard 10-32 UNF fasteners used across industrial, electrical, and mechanical assembly work.

Key Features

• 10-32 UNF thread form with plug chamfer for gradual thread engagement in through-holes
• H7 thread limit produces slightly oversize threads (0.0030 inches oversize) to accommodate plated fasteners
• 3 straight flutes for chip clearance in short-chipping materials
• High-speed steel construction for durability across a range of machinable metals
• Bright uncoated finish — no coating buildup to affect thread tolerance
• Right-hand thread direction, no coolant-through requirement

Compatibility

Designed as a standard replacement or general-use tap for any application requiring 10-32 UNF right-hand internal threads; fits tap handles and machine holders accepting a 0.1940-inch shank diameter.

Installation Notes

Use the correct tap drill size for 10-32 UNF threads before starting; the plug chamfer requires a properly sized and deburred pilot hole. Apply cutting oil or tapping fluid appropriate to the workpiece material to extend tool life and improve thread finish. When hand tapping, advance the tap with steady pressure and back off a quarter turn periodically to break chips. Secure the workpiece fully before tapping to prevent movement that can break the tap.