What is the drill size for 1/4 BSP?
British Standard Pipe Parallel or Taper BSP or BSPT
| Nominal Size (inches) | T P I | Tapping Drill Size |
|---|---|---|
| 1/8 | 28 | 11/32 inch |
| 1/4 | 19 | 11.8 mm |
| 29/64″ | ||
| 3/8 | 19 | 15.25 mm |
What size drill bit do you use for 1/4 NPT tap?
7/16″
NPT Tap Drill Chart
| Tap Size | Drill Size | Tap and Drill Set |
|---|---|---|
| 1/4″ NPT Tap | 7/16″ Drill Bit | 1/4″ NPT Tap and Drill Set |
| 3/8″ NPT Tap | 37/64″ Drill Bit | 3/8″ NPT Tap and Drill Set |
| 1/2″ NPT Tap | 23/32″ Drill Bit | 1/2″ NPT Tap and Drill Set |
| 3/4″ NPT Tap | 59/64″ Drill Bit | 3/4″ NPT Tap and Drill Set |
What is the tapping drill size for 1/4 BSF thread?
British Standard Whitworth (BSW) is an imperial-unit-based screw thread used for ISO 7-1 and ISO 228 threads (formerly BS-2779)….Taps and drill sizes used for Whitworth – ISO 7 and ISO 228 threads.
| Size Taps (inches) | TPI | 75% Drill Size for Pipe Taps (inches (mm)) |
|---|---|---|
| 1/4 | 20 | #9 (5.1) |
| 3/8 | 16 | 5/16 (8) |
Are BSP and NPT interchangeable?
NPT and BSP threads are generally not compatible due to the differences in their thread forms. NPT and BSP thread pitches (threads per inch, TPI) are listed below. You can use 1/2″ and 3/4″ NPT and BSP fittings together, but all others will be incompatible and will therefore leak.
Is BSP same as Whitworth?
British Standard Whitworth (BSW) is an imperial-unit-based screw thread standard, devised and specified by Joseph Whitworth in 1841 and later adopted as a British Standard. It was the world’s first national screw thread standard, and is the basis for many other standards, such as BSF, BSP, BSCon, and BSCopper.
What is a tap drill size?
a good tap drill is 90% (± 2 pp) of major diameter for fine threads. Therefore, a size 7⁄16 screw ( 7⁄16 ≈ 0.437) with 14 threads per inch (coarse) needs a tap drill with a diameter of about 0.371 inches.
What is the drill size for a 1/4-20 tap?
| To Tap This Size Screw Or Bolt: | Use This Drill Bit: | (Closest Fractional:) |
|---|---|---|
| 14-20 NS | #10 | – |
| 1/4-20 NC | #7 | 13/64″ |
| 14-24 NS | #7 | – |
| 6mm-1.00mm | 5.2mm | – |
What size is a 1/4 drill bit in MM?
| Drill Bit Hole Diameters | ||
|---|---|---|
| Metric Size | Fractional Size | |
| 7 mm | .2756 | 1/4 |
| 8 mm | .3150 | 17/64 |
| 9 mm | .3543 | 9/32 |
What is the difference between BSP and BSPT?
BSPP is also called G thread, which is BSP parallel thread. To form a seal or connection by 60 cone or washer or O-ring on the boss. And BSPT is a taper thread, it creates a seal by thread. Both Threads have the same pitch and angle 55 degree.