Metric ↔ inch fasteners converter

Converting between metric and inch fasteners forces you to make compromises.
This converter gives you best proposals and will show you the differences in an easy way.

Input for conversion

Metric to Inch Inch to Metric

Thread type and size
Mechanical property class

Proposal

Thread type and size	UNC 1 - 64 UNF 1 - 72 Metric
Similar mechanical property classes	SAE J429 Grade 1, ASTM A307 A

View dimensional and mechanical details

Comparison data

SI US customary units

	Input	UNC	UNF	Metric

Diameter, D					mm in
Stress area, As					mm² in²
Pitch, P TPI					mm

	Input	Proposal	Proposal	Proposal	Proposal	Proposal	Proposal	Proposal
Standard
Class/Grade/type
Tensile strength									N/mm² ksi
Yield strength									N/mm² ksi