Osg 1010100 Straight Flute Tap 0-80 Unf Hss Plug

Product Description

The OSG 1010100 is a straight flute tap designed for cutting 0-80 UNF internal threads in a range of ferrous and non-ferrous materials. It features two flutes, a plug chamfer, and is manufactured from high-speed steel with a bright uncoated finish. The plug chamfer provides a gradual lead-in, making this tap suited for through-hole and moderately deep blind-hole applications. Overall length is 1-5/8 inches with a thread length of 5/16 inches and a shank diameter of 0.141 inches. Class of fit is 2B with an H2 thread limit, producing standard tolerance threads appropriate for general mechanical assembly work.

This tap is intended for use in aluminum, cast aluminum, cast iron, high-carbon steel, low-carbon steel, and medium-carbon steel. It is well suited for small-fastener applications where a 0-80 thread form is required, such as precision instrument assembly, electronics enclosures, and light mechanical components. The straight flute design is best applied in through-hole situations or with short chip-producing materials where straight chips can evacuate freely. It is appropriate for manual tapping or low-speed machine tapping operations.

Key Features

• 0-80 UNF thread form with 2B class of fit for standard tolerance threading
• H2 thread limit for consistent, close-tolerance thread production
• Two straight flutes for use in through-holes and free-cutting materials
• Plug chamfer for gradual thread lead-in, suitable for through-hole and shallow blind-hole tapping
• High-speed steel construction provides wear resistance across a broad range of workpiece materials
• Bright uncoated finish - compatible with cutting oils and standard tapping fluids
• Right-hand thread direction; no coolant-through feature

Compatibility

Designed as a replacement or production tap for any application requiring a 0-80 UNF 2B class of fit internal thread. Compatible material applications include aluminum, cast aluminum, cast iron, high-carbon steel, low-carbon steel, and medium-carbon steel as specified by the manufacturer.

Installation Notes

This tap is installed by machinists or precision assemblers using a tap wrench, tapping head, or low-speed machine spindle. Always use an appropriate cutting fluid or tapping compound for the workpiece material before beginning the thread-cutting operation. Ensure the tap is aligned perpendicular to the workpiece surface to avoid tap breakage, which is a significant risk at the 0-80 size. Back the tap off periodically during hand tapping to break and clear chips, and never force the tap against an obstruction at the bottom of a blind hole.