Radius points are the most common and can be the cheapest of the indicator contact points. The diameter (ØA) is .188" and the radius is 4 mm. There are two styles: they're made of blackened, hardened steel or they have a carbide end, both with a light radius. Although they are available in many different lengths, we think it's best to buy the standard 1/4" length, and then combine it with an appropriate extension.
NUTS & BOLTS
Easy reading for anyone curious about the origins of mechanical engineering.
HOW WAS THAT BUILT?
From the Brooklyn Bridge to the Sapporo Dome in Japan.
"Perfect for browsing by young readers with an interest in engineering or architecture." - Wall Street Journal
STARRETT
An American Manufacturing Tradition