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1-1/4 NPT male end on a Sch 40 pipe stub
1-1/4 NPT male end on a Sch 40 pipe stub: OD 42.16 mm, bore 35.05 mm (Sch 40 wall); the threaded length L2 = 17.95 mm is a plain pitch-diameter cone, 39.55 mm at the pipe end (E0) growing to 40.67 mm (taper 1:16 on diameter), thread form not drawn; 20 mm stub behind it and the overall length 37.95 mm are examples
Exact dimensions. True size, no tolerance added. Threads are plain cylinders at the major diameter.
STEP STL free, CC BY 4.0 (credit "Xem Studio")
Dimensions
| NPS | 1-1/4 |
|---|---|
| TPI | 11.5 |
| pitch, mm | 2.209 |
| pipe OD D, in (mm) | 1.660 (42.16) |
| E0 pitch dia at pipe end, in (mm) | 1.55713 (39.551) |
| L1 hand-tight engagement, in (mm) | 0.4200 (10.67) |
| E1 pitch dia at L1, in (mm) | 1.58338 (40.218) |
| L2 effective thread, in (mm) | 0.7068 (17.95) |
| thread height h, in (mm) | 0.0696 (1.77) |
| female tap drill, with taper reamer | 1-15/32 (LBL, Torqbolt) |
| female tap drill, no reamer (sources differ) | 1-31/64 (Allied, Torqbolt) / 1-1/2 (LBL) |
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NPT pipe thread dimensions (ASME B1.20.1): TPI, E0, E1, L1, L2 and tap drill, NPS 1/8 to 6 + male NPT end STEP/STL: every size, notes, mating features and sources. What are the NPT thread dimensions (threads per inch, pitch diameter E0 and E1, hand-tight engagement L1, effective length L2) and the tap drill for each pipe size from 1/8 to 6 inch?
Other sizes
- 1-1/2 NPT male end on a Sch 40 pipe stub
- 2 NPT male end on a Sch 40 pipe stub
- 2-1/2 NPT male end on a Sch 40 pipe stub
- 3 NPT male end on a Sch 40 pipe stub
- 3-1/2 NPT male end on a Sch 40 pipe stub
- 4 NPT male end on a Sch 40 pipe stub
- 5 NPT male end on a Sch 40 pipe stub
- 6 NPT male end on a Sch 40 pipe stub