Table of Contents
What is difference between 6H and 6g?
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.
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 is 6g tolerance?
Screws threads with identical external tolerances and pitch tolerances are expressed with a single tolerance letter and number. For instance, a screw with a 6g major diameter tolerance and a 6g pitch diameter tolerance would simply be written as “6g”.
What does 6H mean?
Filters. (UK) A grade of pencil with lead that makes lighter marks than a pencil grade 5H; a pencil with extremely hard lead.
Which thread gauges among the following are very accurate?
The three wire method is the most accurate and universally recognized method of measuring the effective or pitch diameter of an external screw thread or thread plug gage.
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 does H mean on taps?
H means (high) above basic pitch diameter and L (low) below basic pitch diameter. Tap limits have been established to provide a choice in the selection of the tap size best suited to produce the class of thread desired.
What’s the difference between M6 and M6 x 6 thread?
The 6 is the tolerance grade – medium, for a “normal” length of thread engagement. Looking for lightweight, reliable, and easy to use? Discover powerfully designed, easy-to-use household cleaners to seamlessly cover your cleaning needs.
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.
What should the internal thread be in Class 6G?
The internal thread should be an upper case letter “G” or “H.” If a class 6g setting plug were used to inspect product threads, the results would fail the same as they did with the class 2A in the example. Figure 4 shows some typical product thread assembly class correlations. These are for a general reference.