NPT - American tapered pipe
1/16-27 NPT pipe thread: 27 TPI, major Ø 7.94 mm.
Profile
| Designation | 1/16-27 NPT |
|---|---|
| Major (outside) diameter | 7.94 mm · 0.3126" |
| Pitch | 0.941 mm · 27 TPI |
| Pitch diameter | 7.329 mm · 0.2885" |
| Minor diameter (external) | 6.786 mm · 0.2672" |
| Minor diameter (internal) | 6.922 mm · 0.2725" |
| Recommended tap drill | 6.35 mm |
Pipe threads are made up to a seal against the mating flanks, not tightened to a bolt preload, so no proof load or tightening-torque figure applies.
The bolt schedule collects the fasteners for one job onto a single sheet - tap drill, wrench size, grade and tightening torque on every line, taken straight from pages like this one. Free schedules hold 3 lines and are saved in this browser only.
1/16-27 NPT is a NPT pipe thread running at 27 threads per inch on a 7.94 mm major diameter. NPT is a 60° tapered thread that seals on the flanks; use a tapered reamer after drilling for a full-form thread.
All values are generated from the standard thread formulas (ISO 68-1 / ASME B1.1) and published standard tables - not hand-entered. See the full reference.
Drill 6.35 mm before tapping 1/16-27 NPT. NPT is a 60° tapered thread that seals on the flanks; use a tapered reamer after drilling for a full-form thread.
1/16-27 NPT is tapered. NPT is a 60° tapered thread that seals as the flanks wedge together, normally with thread sealant or PTFE tape.
1/16-27 NPT runs at 27 threads per inch, a pitch of 0.941 mm, on a major diameter of 7.94 mm.
No. Pipe threads are made up to a seal against the mating flanks, not tightened to a bolt preload, so no proof load or tightening-torque figure applies.
Same diameter
Nearby sizes