Starrett 234A-19 End Measuring Standard Rod 19 Inch

Starrett 234A-19 End Measuring Rod is a 19-inch micrometer setting standard rod crafted from special tool steel, with a 7/16-inch (0.4375 in) diameter and hardened, accurately lapped ends formed to a spherical radius for consistent, contact-friendly reference points. These end measuring rods are used to check and set micrometers of 2 inches capacity and larger, and they also serve as a stable reference when comparing gauges or inspecting parallel surfaces on machine tools. The 19-inch length and spherical ends make it a versatile standard for bench and shop metrology, with variants available that include an insulating rubber handle to minimize heat-related expansion in hand-held use. Starrett’s 234 series emphasizes durability and precision, and larger sizes in the End Measuring Rod family are offered for broader measurement ranges as needed.