Osg 1405010808 Thread Forming Tap 3/8-16 Unc Bottoming Ticn

Product Description

The OSG 1405010808 is a thread forming tap in the EXOTAP VP-NRT series, designed to cold-form 3/8-16 UNC internal threads without cutting chips. Made from powdered metal high-speed steel and coated with TiCN, this tap generates threads by displacing material rather than removing it, resulting in stronger threads and no chip evacuation concerns. The bottoming chamfer (1 to 1.5 thread lead) allows threading to the bottom of blind holes. With an H9 thread limit and an overall length of 2.9380 inches, this tap is suited for production and maintenance machining environments. Machinists and tool and die professionals are the primary users.

This tap is engineered for blind hole threading operations across a broad range of metallic workpiece materials. It performs in alloy steel, carbon steel, die steel, hardened steel, stainless steel, and aluminum applications. The EXOTAP VP-NRT series is a recognized thread forming line designed for demanding hole threading where chip-free processing is required, such as in close-tolerance machined components, automotive parts, and structural assemblies. The right-hand thread direction matches standard UNC fastener convention.

Key Features

• Thread forming (chipless) design produces stronger threads by cold-working the material
• Bottoming chamfer with 1 to 1.5 thread lead for threading close to the bottom of blind holes
• Powdered metal high-speed steel construction for improved toughness and wear resistance over conventional HSS
• TiCN coating (Coating Code V) reduces friction and extends tool life in demanding materials
• H9 thread limit for consistent fit and tolerance control in 3/8-16 UNC applications
• Compatible with alloy steel, carbon steel, die steel, hardened steel, stainless steel, and aluminum

Compatibility

Designed for blind hole threading in alloy steel, aluminum, carbon steel, die steel, hardened steel, and stainless steel workpieces. Material application codes P, M, and N apply. Suitable for use in any standard tapping setup that accepts a 0.3810-inch shank diameter with a 0.2860-inch square drive.

Installation Notes

Thread forming taps require a larger pilot hole than cutting taps - use the correct forming tap drill size for 3/8-16 UNC to achieve proper material displacement and thread form. Apply a suitable tapping fluid or cutting oil appropriate for the workpiece material before use. Secure the workpiece and ensure the tap is properly aligned to avoid tap breakage, especially at blind hole depth limits. This tool is intended for use by trained machinists familiar with tapping torque requirements and machine setup.