# What does 6H mean on a thread gage?

What does 6H mean on a thread gage? Diameter tolerance The first 6H refers to the Pitch Diameter tolerance. The second 6H refers to the minor diameter tolerance. Because screw thread plug gages do not

## What does 6H mean on a thread gage?

Diameter tolerance
The first 6H refers to the Pitch Diameter tolerance. The second 6H refers to the minor diameter tolerance. Because screw thread plug gages do not look at the part minor diameter, the use of the minor diameter tolerance is irrelevant when considering the gage design parameters.

### What does gage tolerance mean?

Gage tolerance is the gage’s increments of measure (also called resolution or discrimination). Your process tolerance is the allowed deviation from a target value that keeps product purpose (process variation). For example, your company manufactures ball point pens with a ball outer diameter of 0.35 mm.

What does a thread gage measure?

A thread gauge, also known as a screw gauge or pitch gauge, is used to measure the pitch or lead of a screw thread. This tool is not used as a precision measuring instrument, rather it allows the user to determine the profile of the given thread and quickly categorize the thread by shape and pitch.

What is 6g in metric thread?

A full designation for a metric thread includes information not only on the thread diameter and pitch but also a designation for the thread tolerance class. The 5g indicates the tolerance class for the pitch diameter and 6g is the tolerance class for the major diameter.

## What is a Class 2 thread?

Classes 2A and 2B offer optimum thread fit that balances fastener performance, manufacturing, economy, and convenience. Nearly 90% of all commercial and industrial fasteners use this class of thread fit. Classes 3A and 3B are suited for close tolerance fasteners.

### What is 6g in thread?

The 5g indicates the tolerance class for the pitch diameter and 6g is the tolerance class for the major diameter. For example: M12 x 1 – 6H/5g6g indicates a tolerance class of 6H for the nut (female) thread and a 5g tolerance class for the pitch diameter with a 6g tolerance class for the major diameter.

How do I know my gauge tolerance?

To calculate the gage tolerance using the 10% product tolerance rule:

1. Calculate the full tolerance of the product feature.
2. Calculate 10% of the product feature tolerance to find the full gage tolerance.
3. Divide the full gage tolerance in half to find the gage member tolerance.

Can a Class 6H Gage be used for a no go Gage?

A Class 6H metric internal thread is inspected with a class 6H go / no-go working plug gage. Truncated setting plug gages for adjustable thread ring gages tend to cause some problems and confusion. Many of these problems are due to misunderstanding the purpose of the truncated setting plug gage. Truncated setting plug gages have only one purpose.

## What kind of plug gage do I need for Class 6H thread?

A Class 6H metric internal thread is inspected with a class 6H go / no-go working plug gage. Truncated setting plug gages for adjustable thread ring gages tend to cause some problems and confusion.

### When to use Class 6G truncated setting Gage?

A class 6g truncated setting plug is used to inspect only a class 6g adjustable thread ring gage. In some situations, we make what we believe to be logical assumptions. A machine shop is asked to make a mating internal thread for the external thread they are presently manufacturing.

Which is larger a setting plug gage or a go Gage?

The setting plug gages will have a go pitch diameter that is larger than the no-go pitch diameter. If someone used a truncated setting plug to inspect internal product threads, they would produce 100% scrap. Any internal product thread the go setting plug entered, would also allow the smaller no-go to enter.