NPT
Плашки кръгли BS 1127
за тръбна конусна резба с конусност 1:16 по ANSI B1.20.1
Форма B
| Означение | P - брой навивки в 1" | D Inc mm | L Inc mm | Брой на перата - Z | Артикулен номер |
| NPT1/8 | 27 | 1" (25.4) | 3/8" (9.5) | 5 | 6453 NPT 1/8x27 |
| NPT1/8 | 27 | 1.5/16" (33.4) | 7/16" (11.1) | 5 | 6453 NPT 1/8x27-1 |
| NPT1/4 | 18 | 1.5/16" (33.4) | 7/16" (11.1) | 5 | 6453 NPT 1/4x18 |
| NPT1/8 | 27 | 1.1/2" (38.1) | 1/2" (12.7) | 5 | 6453 NPT 1/8x27-2 |
| NPT1/4 | 18 | 1.1/2" (38.1) | 1/2" (12.7) | 5 | 6453 NPT 1/4x18-1 |
| NPT3/8 | 18 | 1.1/2" (38.1) | 1/2" (12.7) | 5 | 6453 NPT 3/8x18 |
| NPT1/4 | 18 | 2" (50.8) | 5/8" (15.9) | 5 | 6453 NPT 1/4x18-2 |
| NPT3/8 | 18 | 2" (50.8) | 5/8" (15.9) | 5 | 6453 NPT 3/8x18-1 |
| NPT1/2 | 14 | 2" (50.8) | 5/8" (15.9) | 6 | 6453 NPT 1/2x14 |
| NPT3/4 | 14 | 2" (50.8) | 5/8" (15.9) | 6 | 6453 NPT 3/4x14 |
| NPT1 | 11.5 | 3" (76.2) | 7/8" (22.2) | 7 | 6453 NPT 1x11.5 |
| NPT1.1/4 | 11.5 | 3" (76.2) | 7/8" (22.2) | 8 | 6453 NPT 1.1/4x11.5 |
| NPT1.1/2 | 11.5 | 4" (101.6) | 1" (25.4) | 8 | 6453 NPT 1.1/2x11.5 |
| NPT2 | 11.5 | 4" (101.6) | 1" (25.4) | 9 | 6453 NPT 2x11.5 |
| N2.1/2 | 8 | 5" (127.0) | 1.1/2" (38.1) | 10 | 6453 NPT 2.1/2x8 |
| NPT3 | 8 | 5" (127.0) | 1.1/2" (38.1) | 12 | 6453 NPT 3x8 |