Value Collection MSC-04489365 Straight Flute Tap 1-1/8-12 Unf

Product Description

The VALUE COLLECTION MSC-04489365 is a straight flute bottoming tap designed for cutting internal threads in through-holes and blind holes where full thread depth close to the bottom is required. Made from high-speed steel with a bright, uncoated finish, it cuts a 1-1/8-12 UNF right-hand thread to a 3B class of fit with an H4 thread limit. With 4 flutes and a 1.5-inch thread length, this tap is suited for precision threading operations in metal fabrication, maintenance, and machining environments. It has an overall length of 5.75 inches and weighs 0.93 pounds.

This bottoming tap is used in applications where threads must extend close to the bottom of a blind hole, or where a standard taper or plug tap has already started the thread and a finishing pass is needed. It is well suited for general machining, repair work, and production threading of ferrous and non-ferrous metals. The 1-1/8-12 UNF thread specification makes it appropriate for fine-thread fastener applications requiring precise, high-strength thread engagement.

Key Features

• Bottoming chamfer allows threading to the bottom of blind holes
• High-speed steel construction provides durability across a range of metal materials
• Bright, uncoated finish suitable for general-purpose threading applications
• 4 straight flutes for chip evacuation in through-hole and blind-hole work
• 3B class of fit and H4 thread limit for standard tolerance internal threads
• Right-hand thread direction, compatible with standard tap handles and tap drives

Compatibility

Designed as a direct-fit tool for 1-1/8-12 UNF internal threading applications using standard tap handles, T-handle wrenches, or machine tap holders sized for the corresponding tap shank.

Installation Notes

This tap should be installed by a qualified machinist or tooling technician familiar with threading operations. Always secure the workpiece firmly and use appropriate cutting fluid to reduce heat and extend tool life. Start with a taper or plug tap to begin the thread before using this bottoming tap to finish to depth. Do not force the tap if resistance increases suddenly, as this may indicate chip packing or material hardness variation.