Osg 1405010508 Thread Forming Tap 3/8-16 Unc Bottoming

Product Description

The OSG 1405010508 is a thread forming tap in the EXOTAP VP-NRT series, designed for cold-forming internal threads in blind holes without cutting. Instead of removing material, the tap displaces it, producing stronger threads with no chips to clear. Manufactured from powdered metal high-speed steel (PM-HSS) and finished with a TiCN coating, it is built for demanding applications including hardened steel, stainless steel, alloy steel, die steel, carbon steel, and aluminum. The bottoming chamfer - 1 to 1.5 thread lead - allows threading close to the bottom of a blind hole. Thread limit is H6, and the thread direction is right hand.

This tap is suited for machine tapping in CNC machining centers, drill presses, and tapping heads used in production and job shop environments. The 3/8-16 UNC thread form is one of the most common coarse-thread sizes in general metalworking and structural fastener applications. The bottoming chamfer style is the appropriate choice when full thread depth is required close to the floor of a blind hole. This part is sold individually as a single-piece unit.

Key Features

• Thread forming (chipless) design eliminates chip evacuation concerns in blind holes
• Powdered metal high-speed steel construction for toughness and wear resistance
• TiCN coating reduces friction and extends tool life in ferrous and non-ferrous materials
• Bottoming chamfer (1 to 1.5 threads) for maximum thread depth in blind holes
• H6 thread limit for close-tolerance fits
• Right-hand thread direction, 3/8-16 UNC

Compatibility

Designed for blind hole threading in alloy steel, aluminum, carbon steel, die steel, hardened steel, and stainless steel. Part of the OSG EXOTAP VP-NRT series (Series 14050).

Installation Notes

Thread forming taps require a larger pilot hole diameter than cutting taps - consult a thread forming drill chart for the correct forming drill size before use. Set the tapping machine to the manufacturer-recommended spindle speed and apply appropriate tapping fluid or cutting oil for the workpiece material. Secure the workpiece firmly and verify the tap is aligned perpendicular to the hole before engaging. Do not use this tap for through-hole applications where a spiral flute or plug chamfer would be more appropriate.