1/1000 of an inch is known as -

Explanation:

Thousandth of an inch:

• A thousandth of an inch is a derived unit of length in a system of units using inches. Equal to \(\frac{1}{1000}\) of an inch, a thousandth is commonly called a thou.
• 1 inch = 2.54 cm
• 1 micrometer is 1000,000th of 1 meter. 1 micrometer is commonly known as 1 micron.
• 1 mil = (1/1000) × (2.54) × (1/100) × (1000000) = 25.4 micro-meter or microns.
• Mil is an abridged form of the Latin millesimum which means thousandth.
• 1 Nanometer = 10^-9 m