In the case of (screw/bolt) threaded parts, thread plug gauges are used in production shops where the “screws” (externally threaded parts) or the “nuts” (internally threaded parts) are to be quickly checked for inspection and approval. When you consider the metrology (the science of measurement) of threaded parts as a whole, more than a couple of thread gage types are involved; a novice in metrology can become somewhat confused with the terminology of the threaded gages in addition to how they are used. In a threaded part, several features are involved – the thread’s major diameter, minor diameter, pitch diameter, pitch (in case of metric threads) or threads per Inch (TPI in case of Standard American Equivalent (SAE) threads), flank angle, etc. Normally, a GO / NO-GO type of threaded gage will inspect a threaded part based mainly on the pitch diameter. As long as a GO gage is answered (threads properly without being forced) and a NO-GO gauge is not answered, the threaded part is deemed to be accepted and pass inspection. In some specific cases where the thread major diameter (for screws) or minor diameter (for nuts) is critical, separate, plain GO/ NOGO gages (like those used for measuring cylindrical parts) are also used in addition to a threaded gages to determine the acceptance of a threaded part. A thread plug gage is used to check acceptance of a “nut” , (an internally threaded part). For small threaded parts, the gage will be double ended, with one end carrying the GO gage and the other end, the NOGO. For larger parts, the two may be separate pieces. A thread plug gage is designed to check the pitch diameter (to the given pitch / Threads per inch). In order for the part to pass inspection and be accepted, the GO gage should pass through the entire length of the nut, without requiring the use of too much rotational force. The NOGO gage can at the best enter into the nut, checked at both ends, over not more than 2 turns. It should not go beyond this.

A pin gauge, also known as a pin gage, is a precision measuring tool used to measure the diameter or width of holes, slots, or other features on a workpiece. It typically consists of a set of cylindrical pins of varying diameters that are used to determine the size of a hole or opening. Here are some key facts about pin gauges: Types of Pin Gauges: 1. Standard Pin Gauge: Measures hole diameters in increments (e.g., 0.001 inches). 2. Tapered Pin Gauge: Measures tapered holes or slots. 3. Ball-Pin Gauge: Uses a ball-shaped tip to measure curved or irregular surfaces. How to Use a Pin Gauge: 1. Select the appropriate pin gauge size. 2. Insert the pin into the hole or slot until it stops. 3. Check the size marked on the pin to determine the measurement. Advantages: 1. High accuracy and precision. 2. Easy to use. 3. Inexpensive compared to other measuring tools. Common Applications: 1. Machining and manufacturing. 2. Quality control and inspection. 3. Aerospace and automotive industries.

Seven segment, 6 character, 3 colour LED display, ½ inch tall Air-Electronic input from All Air Plug and Ring Gauges (APG & ARG) universal type Two metric measuring ranges: (resolution 0.5µm), (resolution 1µm) Measurement display in absolute or comparative form Auto calibration with two setting masters Keyboard entered upper & lower tolerance limits (UTL & LTL), applicable to the values displayed Static or dynamic (max, min, average & TIR) measurements Non-volatile storage of all menu entered values Available in 1 / 2 / 3 or 4 independent channels Combined advantages of non-contact air sensing and high precision electronics RS232 data output available for further processing like machine control through relay output or for SPC AIR SAVING TIMER AND PROXY SENSOR BASE USB DATA SAVE

Applications Standard/Honing Dimension Type Linear Resolution 0.1μm/ 1μm Units mm Measurement Modes Current, Min, Max, TIR, AVG Additional results Max, Min, Ovality, and Taper for respective result can be display in run mode as additional results. Result Formula Editor Result formula can be edited for combinations of Piezo channels and / or other results. Indications Pass, Fail, Warning with facility to select require display reading in require colour according to the tolerance band Grade Max 25 Grades available Other Features Machine Stop Massage and Machine stop signal available for reject job condition Calibration Single/Double Master configurable / Force Mastering after N number of measured jobs / Group Calibration for selected result in one group / Auto Mastering is available. Accept Higher and Lower master on inserting into fixture/plug automatically in calibration process Auto Air Cut-Off Yes (Air will become ON after inserting job in Fixture/Plug) Air Saving facility / When nothing is inserted in Fixture/Plug Air will be OFF Measurement process Auto Cycle (After inserting job in Fixture/Plug it will show related Fixture/Plug result) / Measurement Cycle (Sequential measurement) Online SPC Cp, Cpk,

Applications Standard/Honing Dimension Type Linear Resolution 0.1μm/ 1μm Units mm Measurement Modes Current, Min, Max, TIR, AVG Additional results Max, Min, Ovality, and Taper for respective result can be display in run mode as additional results. Result Formula Editor Result formula can be edited for combinations of Piezo channels and / or other results. Indications Pass, Fail, Warning with facility to select require display reading in require colour according to the tolerance band Grade Max 25 Grades available Other Features Machine Stop Massage and Machine stop signal available for reject job condition Calibration Single/Double Master configurable / Force Mastering after N number of measured jobs / Group Calibration for selected result in one group / Auto Mastering is available. Accept Higher and Lower master on inserting into fixture/plug automatically in calibration process Auto Air Cut-Off Yes (Air will become ON after inserting job in Fixture/Plug) Air Saving facility / When nothing is inserted in Fixture/Plug Air will be OFF Measurement process Auto Cycle (After inserting job in Fixture/Plug it will show related Fixture/Plug result) / Measurement Cycle (Sequential measurement) Online SPC Cp, Cpk,

Quick and easy checking of bore Standard 2 jets for checking size, taper, ovality 3 jets at 120 degree for average size & tri-lobed effect (for diameter 6 mm & above) With extensions to check deeper bores Can be supplied to check through or blind bores Can be supplied with multiple jets Hard chrome plated for extended life Can be supplied with carbide sleeve on request For specific depth or land width checking, adjustable depth collars can be provided