Product Description
Milwaukee 3/4 in.-16 NF 1-7/16 in. Hex Threading Die
Model Number: 49-57-5378
The Milwaukee 49-57-5378 is a 3/4 in.-16 NF Hex Threading Die, precision machined for creating or repairing clean, accurate external threads in the largest size of Milwaukee's SAE die range. Where a tap cuts internal threads inside a drilled hole, a die does the opposite job: it cuts external threads onto round stock and rod, or chases and restores the damaged threads on an existing bolt or stud. This die cuts the 3/4 in.-16 NF thread, a 3/4 in. diameter with 16 threads per inch in the National Fine series. Note the thread series carefully: the 3/4 in. size comes in two common threads, this fine 3/4 in.-16 and the coarser 3/4 in.-10, so match this die to 3/4 in.-16 hardware and confirm your thread before ordering, since the two are not interchangeable. The finer 16 TPI thread is used in automotive, machinery, spindle and axle hardware, and precision applications at this large diameter. The defining feature of these dies is the hex shape that lets them be driven with a wrench or socket rather than a round die stock, and note that this larger die uses a 1-7/16 in. hex, stepped up from the 1 in. hex of the smaller sizes to handle the higher torque that threading a 3/4 in. diameter demands. Drive it with a 1-7/16 in. wrench or socket for solid, controlled cutting.
The die is built for durability and lasting identification. High carbon steel construction holds a sharp cutting edge through the common metal applications it is designed for, and a protective black oxide coating resists corrosion while helping to reduce friction as the die cuts. Milwaukee marks these dies with long-lasting laser-etched sizing rather than stamped markings, so the size and thread series stay clearly legible over the life of the tool, which matters when you carry both the 3/4 in.-10 and 3/4 in.-16 dies. The 1-7/16 in. hex body seats securely in a wrench or socket for straight, square starts and steady cutting, and at this large size the leverage of a good wrench and generous cutting fluid make a real difference in control and effort.
This threading die is designed for cutting external 3/4 in.-16 NF threads in the most common metal applications, including brass, aluminum, mild steel, and more, which makes it a go-to for mechanics, machinists, fabricators, and maintenance crews who work with 3/4 in.-16 hardware. It pairs directly with the matching 3/4 in.-16 NF tap for complete internal and external threading of the same size, and is compatible with 1-7/16 in. hex die stocks. For the cleanest finish, easiest cutting, and longest die life, use the die with cutting fluid to keep heat and friction down as it works.
Features
- Genuine Milwaukee 3/4 in.-16 NF Hex Threading Die
- Cuts clean, accurate external threads on rod, stock, bolts, and studs
- Chases and repairs damaged 3/4 in.-16 NF external threads
- Largest size in Milwaukee's SAE die range
- Fine 3/4 in.-16 thread, distinct from the coarse 3/4 in.-10, so confirm your thread
- 1-7/16 in. hex, stepped up from the 1 in. hex of smaller dies for higher torque
- Driven with a 1-7/16 in. wrench or socket, no round die stock required
- Used in automotive, machinery, spindle and axle hardware, and precision work
- High carbon steel construction for durability
- Protective black oxide coating for corrosion resistance
- Long-lasting laser-etched sizing for the clearest identification
- Pairs with the matching 3/4 in.-16 NF tap, best used with cutting fluid
Specifications
- Manufacturer: Milwaukee Tool
- Part Number: 49-57-5378
- Type: Hex Threading Die
- Thread Size: 3/4 in.
- Thread Series: NF (National Fine)
- Threads Per Inch: 16
- Function: Cuts external threads
- Die Shape: 1-7/16 in. hex, wrench or socket driven
- Material: High carbon steel
- Finish: Black oxide
- Threads: Brass, aluminum, mild steel, and other common metals
- Part Type: Genuine Milwaukee Accessory
Includes
- (1) Milwaukee 49-57-5378 3/4 in.-16 NF 1-7/16 in. Hex Threading Die
