In the thread gauges system, the limit type is most common. Thread of workpiece is ensured by controlling the GO and NOT GO limit. The types of limit thread gauges systems are broadly divided into ISO class and conventional class 1,2,3.
Differences listed below
1. GO and NOT GO of the ISO gauge system is made with same dimentions for both inspection and working.
2. Pass/Fail assessment of a NOT GO gauge for the ISO class gauge system has been set as not be screwed in more than two revolutions.
  For class 1,2,3 gauge system it is not to be screwed in more than two revolutions, included two revolutions.

A standard thread gauge is comprised of a precisely connected pair of thread ring gauges and thread plug gauges. Unlike the limit system gauge, it is an accurately manufactured gauge to fit into the threads basic angle so it passes when the thread ring gauge and the thread plug gauge go through the thread of workpiece. Use the limit thread gauge when precise fitting of the product is needed.

Taper thread gauge are used for inspection of R(Rc,Rp) defined in JIS B 0253. Thread of workpieces R and PT are similar in dimensions but the gauging systems are different. It passes if the pipe or the end of the pipefittings is within the range of the length of the notch of the gauge.
Major Differences listed below
1. For the R thread gauge, the thread ring gauge and thread plug gauge are independent and for the thread ring gauge, the cpg (CP) is used.

Gauge for taper pipe thread gauge by American Standard (ANSI) ( Cautionnumber and angle of thread ridge are different from R threads of JIS B 0253)

Thread gauge for perpendicularity
Used to assess the total squareness of the thread of a workpiece and end fact. The right angle of the gauge is finished in advance at a pre-determined degree, guaranteeing accuracy of the right angle of the thread and end face as shown by the attaching of the end face of the gauge to the workpiece at a rightangle.

Thread gauge for concentricity
The gauge assesses the total concentricity of the thread and plane hole on shaft. Complicated tools.

Thread gauge for deep holes and thread length
When there is tolerance in the effective length of the thread of the workpiece, use the thread gauge for the thread length, and when the thread of the workpiece is in a deeper position than the end face, use the thread gauge for deep holes.
For a thread gauge for the thread length set the tolerance by the notch , and it passes when the end face of the thread fits into the notch.

Thread gauge for depth can indicate the depth by the graduation or groove in the neck.

Adjustable thread ring gauge
The adjustable thread ring gauge’s feature is the ability of the locking screw to adjust to the diameter of the thread.

Gauge handle with depth measurement   NEW
This gauge handle can confirm simple depth of the screw and inspect with go gauge simultaneously.

Gauge handle with colored ring   NEW
Colored rings visually identify place to be applied, calibration period, management post, etc

Limit gauges for holes which has gauging surfaces based on least material limit and maximum material limit of hole.
The gauge part material is carbide, which has excellent wear resistance compared with the standard gauge material SKS(steel alloy).
The shape is in conformance with standard products; please keep this in under consideration.

Ring gauges are used mostly for comparatively small dimensional materials.
Gap gauges are for heavy weight and hard to handle materials.
The shape is graduated on one side as GO and NOT GO, so it does not need to be flipped over, reducing inspection time.
The gauge part material is carbide, which has excellent wear resistance compared with the standard gauge material SKS (steel alloy).

Master gauges are used for setting-up of relative measuring instruments, as dimensional standards.
ISSOKU makes original Master Ring gauges for air micrometers, which are thicker than standard master ring..
Please refer to Master Gauges for air micrometers in the catalog..
The gauge part material is carbide, which has excellent wear resistance compared with the standard gauge material SKS (steel alloy).

Taper gauges are used to inspect gauge taper and the taper’s standard diameter (the diameter at the large or small end).
Generally comprised of a taper plug gauge and a taper ring gauge, the connected pair forms a standard gauge.

It is used for static precision testing of tooling machines, measuring devices, etc, for parallelism, roundness, and run out of rotary shaft.

internationally,which has two kinds of male luer and female lier. Gauge based on ISO594-1 is used to check 6%(luer) taperd portion.Gauge based on ISO594-2 is used to check leakage,separating force, trip torque, easy assembly, resistance running around or stress cracking test specifled into this standard.

Interchangeability of connecting parts of masks connectors and tubing are needed to assure proper assemble of anaesthetic and breathing system.Gauges for testing these connection are used for manufacturing and inspection of equipment and incoming inspection at medical institutions.