# What is the pitch of a thread?

## What is the pitch of a thread?

The thread pitch is the distance between corresponding points on adjacent threads. Measurements must be taken parallel to the thread axis. The major diameter or outside diameter is the diameter over the crests of the thread, measured at right angles to the thread axis.

## How many thread pitches are there?

Nominal Size and Threads Per In. Basic Pitch Dia. Basic Pitch Dia.
11⁄8 – 7 1.0322 1.0438
11⁄4 – 7 1.1572 1.1688
13⁄8 – 6 1.2667 1.2938

What is the pitch of a 1 UNF thread?

Nominal Diameter Major Diameter Inch Pitch mm
5/8″ – 18 UNF 0.625 1.411
3/4″ – 16 UNF 0.750 1.587
7/8″ – 14 UNF 0.875 1.814
1″ – 12 UNF 1.000 2.117

Thread series displays various diameter/pitch combinations that are measured by the number of threads per inch (TPI), applied to a single diameter….

Nominal Dia. (mil.) STANDARD COARSE FINE
22 2.500 1.500
24 3.000 2.000
27 3.000 2.000

### What is a 1.25 thread pitch?

A 10mm x 1.25 is a course pitch. With the threads 1.25mm apart that works out to 20.3 threads per inch. A 1.5mm pitch is a courser pitch that works out to 16.9 threads per inch.

### What is a 1.5 thread?

The thread pitch is the distance between threads expressed in millimeters (measured along the length of the fastener). For example a thread pitch of 1.5 means that the distance between one thread and the next is 1.5mm. In general smaller fasteners have finer thread so they have lower thread pitch.

What pitch is M14 fine?

ISO Metric Fine PITCH Major Diameter
M12 1.25 12.0
M12 1.50 12.0
M14 1.00 14.0
M14 1.25 14.0

Unified Thread Series 8 TPI ANSI/ASME B1. 1

Nominal Diameter Major Diameter Inch Pitch mm
1 3/8″ – 8-UN 1.3750 3.175
1 7/16″ – 8-UN 1.4375 3.175
1 1/2″ – 8-UN 1.5000 3.175
1 9/16″ – 8-UN 1.5625 3.175

## What thread pitch is M12?

Metric Thread Pitch and Tapping Sizes

Size Pitch (mm) Tapping Diameter (mm)
M10 1.5 8.5
M12 1.75 10.2
M16 2.0 14.0
M20 2.5 17.5