THREADMILLING REFERENCE GUIDE | 3 A thread mill can be thought of as an end mill with the profile of the thread on the side. Using multiple axes of a CNC machine allows you to helically interpolate the thread profile into a work piece. Unlike a tap, a thread mill has a smaller diameter than the thread size being ThreadTap Single. Size: 3/8-18 NPTF. Drill Size: 14.5mm. Style: Taper. Orientation: Right Hand. Goliath is one of Australia’s most trusted and valued names for high quality, high speed threading solutions. Use PerASME, a 3/8 NPT thread requires drilling for a 0.697 inch diameter hole to enable cutting full and even threads. Recommended Size: 37/64 Drill Bit At 0.578 inch Thereare four types of NPT threads: National Pipe Taper (NPT) National Pipe Straight (NPS) National Pipe Taper For Fuel (NPTF) NPT Threads Dimensions. NPT ThreadSize. 4-4 0. 4-4 8. 5-4 0. 6-3 2. 6-4 0. 8-3 2. 8-3 6. 1 0-2 4. 1 0-3 2. 1 2-2 4. 1 2-2 8. 1 / 8 "-2 7. 1 Iron. Nickel. Plastic. Stainless Steel. Steel. Titanium. Hardened Steel. Flute Type. Spiral. Spiral Point. Straight. Thread Type. BSPT. Metric. NPT. UNC. UNF. Shank Type. Hex. Morse Taper. Round. Square. Component. Clutch Conclusion In order to properly tap 1/8 NPT threads, you will need to use a drill bit that is slightly smaller in diameter than the tap. The specific size needed will depend on the brand and type of tap being used. In general, a #7 drill bit should be used for taps up to and including 3/8″ in size. A #7-1/2 drill bit should be used for taps NPTThread (USA) NPTF Thread (USA) NPSC Thread (USA) NPSF Thread (USA) NPSL Thread (USA) NPSM Thread (USA) ACME Thread (USA) STUB ACME Thread (USA) Drill Size mm: TPI: Pitch mm: 1/16" - 27 NPSF: 7.582: 6.304: 27: 0.940: 1/8" - 27 NPSF: 9.929: 8.651: 27: 0.940: 1/4" - 18 NPSF: 13.236: 11.232: 18: 1.411: 3/8" - 18 NPSF: HSSInterrupted Thread Pipe Taps, NPT, NPTF, ANPT for general pipe tapping applications. Bright finish, steam oxide, TiCN coating standard, TiN available. Tap-Drill Size Calculator; THREADPRO ; LITERATURE. Catalogs; Brochures; Literature Request; OSG Shape It; LOGIN; 3/8-18 NPT INT.THRD PIPE TAP TiCN: 77: 1311700: 1/2-14 hgRwy.

3 8 npt thread drill size