Osg 1591202 Spiral Point Tap 5/16-24 Unf Hss Elektralube

Product Description

The OSG 1591202 is a spiral point tap designed for cutting 5/16-24 UNF right-hand threads in through-hole applications. Manufactured from high-speed steel with an elektraLUBE coating, it drives chips forward ahead of the cut to prevent clogging and reduce heat buildup during tapping. The plug chamfer distributes cutting load across several lead threads, making it well-suited for through-hole threading in a range of materials. With a thread limit of H11 and an oversize designation of 0.0050 inches, it is engineered to produce threads with controlled tolerance for reliable thread fit. This tap ships individually and is intended for use by machinists, maintenance technicians, and tooling professionals.

This tap is used in production and maintenance machining environments where 5/16-24 UNF through-hole threads are required. The spiral point design is particularly effective in CNC machining centers, drill presses, and tapping machines where continuous chip evacuation forward through the hole is practical. It is appropriate for use in ferrous and non-ferrous metals, plastics, and similar machinable materials where controlled thread tolerance and coating-enhanced lubricity provide measurable process advantages.

Key Features

• 5/16-24 UNF thread form for fine-pitch unified thread applications
• High-speed steel construction for durability across a range of materials
• elektraLUBE coating reduces friction and improves tool life
• Spiral point geometry drives chips forward for efficient through-hole tapping
• Plug chamfer with 2 flutes for balanced cutting and lead-in
• H11 thread limit with 0.0050 inch oversize for precise thread tolerance control

Compatibility

Designed for through-hole tapping of 5/16-24 UNF threads. Suitable for use with standard tapping chucks, CNC rigid-tap holders, and manual tap wrenches compatible with this thread form and tap body size.

Installation Notes

Installation should be performed by a qualified machinist or tooling technician familiar with tap geometry and thread standards. Ensure the workpiece is securely fixtured and the spindle is properly aligned before tapping to avoid tap breakage. Use a compatible tapping fluid or cutting oil in addition to the coating when working with harder materials to extend tool life. Inspect the tap for wear or damage before each use and replace if thread quality or torque requirements indicate deterioration.