Osg 1030000 Straight Flute Tap 00-90 Unc 2 Flute Hss

Product Description

The OSG 1030000 is a straight flute tap designed for cutting internal threads to the 00-90 UNC standard. It features two flutes ground from high-speed steel (HSS) with a bright, uncoated finish. The plug chamfer provides a gradual entry into the workpiece, making it well suited for through-hole tapping applications. With an overall length of 1-9/16 inches and a thread length of 1/4 inch, this is a compact, precision tap built for small-diameter threading work. A licensed machinist or tooling technician is the typical installer in a machine shop or production floor setting.

This tap is intended for threading small-diameter through holes in a range of ferrous and non-ferrous materials, including aluminum, cast aluminum, cast iron, low-carbon steel, medium-carbon steel, and high-carbon steel. Its H1 thread limit makes it appropriate for close-tolerance work where minimal oversize is required. The straight flute design suits applications where chips can be pushed ahead or where workpiece material is relatively free-cutting.

Key Features

• Thread size 00-90 UNC with a right-hand thread direction
• Two-flute straight flute geometry for through-hole tapping
• Plug chamfer for gradual thread engagement on entry
• High-speed steel construction provides good wear resistance across multiple materials
• H1 thread limit for close-tolerance, minimal-oversize applications
• Bright, uncoated finish suitable for use with cutting fluid in general machining
• No coolant-through feature; external lubrication is required

Compatibility

Designed for threading 00-90 UNC through holes in aluminum, cast aluminum, cast iron, low-carbon steel, medium-carbon steel, and high-carbon steel workpieces. Part of the OSG S110 series.

Installation Notes

This tap is installed by a machinist or tooling technician using a tap wrench, tapping head, or machine spindle. Ensure the workpiece is properly secured and the tap is aligned square to the hole before engagement. Apply an appropriate cutting fluid or tapping compound for the workpiece material before and during threading. Never reverse a tap under load without first relieving chip pressure, as breakage risk is high at this small diameter.