AGD Contact Points
For dial and digital indicators
These points will work with any style or brand of dial or digital indicator as long as you select the correct thread size (metric M2.5 or AGD 4-48).
What kind of point to use?
The way some people bandy the terms 4-48 and M2.5 about, you'd think this was an innate sense we should have been born with.
4-48 is the thread size in inches, and M2.5 is in metric. They're different and one won't fit into the other. Just because your indicator is graduated in inches or in millimeters doesn't automatically tell you which point to use. There are metric reading indicators which have inch threads, and vice versa.
To make sure, take out your micrometer or calipers and measure the diameter of the threaded portion of the contact point which fits your indicators. Allowing for some variations in manufacturing, the 4-48 thread will have a diameter of about .108" to .110" while the metric M2.5 thread will be about .1" (that's 2.5 mm)
The way some people bandy the terms 4-48 and M2.5 about, you'd think this was an innate sense we should have been born with.
4-48 is the thread size in inches, and M2.5 is in metric. They're different and one won't fit into the other. Just because your indicator is graduated in inches or in millimeters doesn't automatically tell you which point to use. There are metric reading indicators which have inch threads, and vice versa.
To make sure, take out your micrometer or calipers and measure the diameter of the threaded portion of the contact point which fits your indicators. Allowing for some variations in manufacturing, the 4-48 thread will have a diameter of about .108" to .110" while the metric M2.5 thread will be about .1" (that's 2.5 mm)
A comprehensive collection of 14 of the most useful dial indicator contact points which can be used with any 4-48 AGD dial or digital indicator. (Made by Starrett)
More about dial and digital indicator contact points
- other shapes and sizes
- length extensions
- inch/metric point converter
- are you looking for test indicator contact points?
- contact point set: a full assortment of quality dial indicator points
- the Indicator Reference Guide
- the best of Mitutoyo on Amazon
- the best of Brown & Sharpe on Amazon
- the best of Starrett on Amazon
- the best of Fowler on Amazon
STARRETT
An American Manufacturing Tradition
Long Island Indicator Service
Long Island Indicator Service was founded in 1960. We provide professional repair service for precision measuring tools and gages with an emphasis on Swiss made test indicators, dial indicators, dial calipers and micrometers. We are pleased to be a recognized service partner for Brown & Sharpe.
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Privacy: We do not collect any information while you are visiting this website unless you proceed to place an order. If you place an order, your information will be kept confidential and will not be sold or made available to any other entity. If one of our links leads to Amazon, their privacy statement should be considered.