M14×1.5 thread: 14 × 1.5 mm
Threads › M14×1.5
M14×1.5 is an ISO metric fine thread: 14 mm major diameter, 1.5 mm pitch, 60° form. Tap drill 12.5 mm. Clearance hole 15 mm (close) or 15.5 mm (normal).
| Standard | ISO metric fine |
|---|---|
| Major diameter | 14 mm |
| Pitch | 1.5 mm |
| Thread angle | 60° |
| Minor diameter, bolt | 12.16 mm |
| Minor diameter, nut | 12.38 mm |
| Tap drill | 12.5 mm |
| Clearance hole | 15 mm close, 15.5 mm normal |
| Usual class | 6g bolt, 6H nut |
Minor diameters worked out from the basic profile: major Ø − 1.22687 × pitch (bolt) and − 1.08253 × pitch (nut).
Open M14×1.5 in BenchsmithAdd to order list
What the call-out means
M | ISO metric |
14 | Major diameter, mm |
× 1.5 | Pitch, mm. Given because it is a fine pitch |
-6g | Bolt tolerance class (usual) |
-6H | Nut tolerance class (usual) |
Measure it
Bolt: Measure across the crests of the bolt with the caliper jaws. Worn bolts read 0.1 to 0.3 under.
Nut or tapped hole: Measure across the tops of the threads inside the nut or hole with the inside jaws. That is the minor Ø. Worn or oversize holes read a little over.
Same diameter, other pitch
- M142 mm pitch
Close in size, won't mate
- Tr14×3Ø14 mm, 3 mm pitch
- 1/4-18 NPTØ13.72 mm, 18 TPI
- 9/16-12 UNCØ14.29 mm, 12 TPI
- 9/16-18 UNFØ14.29 mm, 18 TPI
- 9/16 BSWØ14.29 mm, 12 TPI
- G1/4Ø13.16 mm, 19 TPI
One size up or down
Got a bolt and no idea what it is? Measure the outside Ø and type it into Benchsmith → Find → Thread.