1/4-18 High Speed Steel Pipe Tap
1/4-18 High Speed Steel Pipe Tap
Item #: TAPS025-NPT
Manufacturers:
Product Specification
| Tap Type | NPT |
|---|---|
| Overall Length | 2 7/16 |
| Thread Length | 1.0625 |
| Material | High Speed Steel |
| Country of Origin | Domestic |
| Weight | 0.126000 |
| Size | 1/4 |
Dimensional Specifications
|
Tap Size |
Thread | Overall Length |
Length of Thread |
Number of Flutes |
| 1/16 | 27 | 2 1/8 | 11/16 | 4 |
| 1/8 | 27 | 2 1/8 | 3/4 | 4 |
| 1/4 | 18 | 2 7/16 | 1 1/16 | 4 |
| 3/8 | 18 | 2 9/16 | 1 1/16 | 4 |
| 1/2 | 14 | 3 1/8 | 1 3/8 | 4 |
| 3/4 | 14 | 3 1/4 | 1 3/8 | 5 |
| 1 | 11 1/2 | 3 3/4 | 1 3/4 | 5 |
| 1 1/4 | 11 1/2 | 4 | 1 3/4 | 5 |
| 1 1/2 | 11 1/2 | 4 1/4 | 1 3/4 | 7 |
| 2 | 11 1/2 | 4 1/4 | 1 3/4 | 7 |
| 2 1/2 | 8 | 5 1/2 | 2 9/16 | 8 |
| 3 | 8 | 6 | 2 5/8 | 8 |
| 3 1/2 | 8 | 6 1/2 | 2 11/16 | 8 |
| 4 | 8 | 6 3/4 | 2 3/4 | 8 |
- All dimensions are in inches.
Tap Drill Chart
| Tap Size | Drill Size | Probable % Thread |
| M3-0.5 | 40 | 70-79 |
| 5-40 | 38 | 65-72 |
| 5-44 | 37 | 63-71 |
| M3.5-0.6 | 33 | 72-81 |
| 6-32 | 36 | 71-78 |
| 6-40 | 33 | 69-77 |
| M4-0.7 | 3.25 mm | 74-82 |
| 8-32 | 29 | 62-69 |
| 8-36 | 29 | 70-78 |
| 10-24 | 25 | 69-75 |
| 10-32 | 21 | 68-76 |
| M5-0.8 | 4.2 mm | 69-77 |
| 12-24 | 16 | 66-72 |
| 12-28 | 15 | 70-78 |
| M6-1.0 | 10 | 76-84 |
| 1/4-20 | 7 | 70-75 |
| 1/4-28 | 3 | 72-80 |
| 5/16-18 | F | 72-77 |
| 5/16-24 | I | 67-75 |
| M8-1.25 | 6.7 mm | 74-80 |
| 3/8-16 | 5/16 | 72-77 |
| 3/8-24 | Q | 71-79 |
| M10-1.50 | 8.4 mm | 76-82 |
| 7/16-14 | U | 70-75 |
| 7/16-20 | 25/64 | 65-72 |
| M12-1.75 | 13/32 | 69-74 |
| 1/2-13 | 27/64 | 73-78 |
| 1/2-20 | 29/64 | 65-72 |
| Tap Size | Drill Size | Probable % Thread |
| M14-2.0 | 15/32 | 76-81 |
| 9/16-12 | 31/64 | 68-72 |
| 9/16-18 | 33/64 | 58-65 |
| 5/8-11 | 17/32 | 75-79 |
| 5/8-18 | 37/64 | 58-65 |
| M16-2.0 | 35/64 | 76-81 |
| 3/4-10 | 21/32 | 68-72 |
| 3/4-16 | 11/16 | 71-77 |
| M20-2.5 | 11/16 | 74-78 |
| 7/8-9 | 49/64 | 72-76 |
| 7/8-14 | 13/16 | 62-67 |
| M24-3.0 | 53/64 | 72-76 |
| 1-8 | 7/8 | 73-77 |
| 1-12 | 59/64 | 67-72 |
| 1-14 | 15/16 | 61-67 |
| 1-1/8-7 | 63/64 | 72-76 |
| 1-1/8-8 | 1 | 76 |
| 1-1/8-12 | 1-3/16 | 66-72 |
| M30-3.5 | 1-3/64 | 75 |
| 1-1/4-7 | 1-7/64 | 76 |
| 1-1/4-8 | 1-1/8 | 76 |
| 1-1/4-12 | 1-11/64 | 72 |
| 1-3/8-6 | 1-7/32 | 72 |
| 1-3/8-12 | 1-19/64 | 72 |
| M36-4.0 | 1-1/4 | 82 |
| 1-1/2-6 | 1-11/32 | 72 |
| 1-1/2-8 | 1-3/8 | 76 |
| 1-1/2-12 | 1-27/64 | 72 |
| NPT Tap Size | Taper Pipe Drill Size |
Straight Pipe Drill Size |
| 1/8-27 | R | 11/32 |
| 1/4-18 | 7/16 | 7/16 |
| 3/8-18 | 37/64 | 37/64 |
| 1/2-14 | 45/64 | 23/32 |
| 3/4-14 | 59/64 | 59/64 |
| 1-11.5 | 1-5/32 | 1-5/32 |
| 1-1/4-11.5 | 1-31/64 | 1-1/2 |
| 1-1/2-11.5 | 1-47/64 | 1-3/4 |
| 2-11.5 | 2-7/32 | 2-7/32 |