Screw Thread Micrometers 575, 585 Micrometers for Measuring Pitch Diameter 0-1"/0-25MM; 1-2"/25-50MM These micrometers have a pointed spindle and a double V-anvil, both shaped to contact the screw thread as shown in the drawing.The micrometer reading therefore gives the pitch diameter.* Readability Fea tures • Starrett satin chrome finish – no glare – resists rust • Advanced sleeve design with staggered lines and distinct figures for precise and easy readability • Decimal equivalents on inch tools Ease-of-Handling Fea tures • Balanced frame and thimble design for easy handling and better readability • Gracefully designed tapered frame for use in narrow slots and tight places • Furnished with fixed (non-rotating) anvil, but swivel anvils available on special order • Available in capacity over 2" or 50mm (special order) Accuracy and Long-Life Fea tures • One-piece frame of drop forged steel • Extremely hard and stable one-piece spindle (the heart of our accuracy) • Quick and easy adjustment • Design allows 50% to 75% contact with the thread to be measured, thereby insuring contact with the pitch diameter at all times • Design also ensures against contact with the root area of the thread • Tools are accurate to ±.0002" or 0.004mm 575 and 585 – Inch For measuring American Unified National series and Unified J series screw threads. 585 micrometers come with a one-inch standard at no extra cost. 575M and 585M – Metric For measuring I.S.O. metric and MJ screw threads. 585M micrometers come with a 25mm standard at no extra cost. * MEASURING TIP: These tools are accurate for general purposes, especially if set to a thread plug gage of the size to be measured. A B With the 575AP 0-1", pitch diameter is read directly in inches, since the line AB corresponds to the 0 reading. 575 and 585 Screw Thread Micrometers (.001" Graduation) Cat. No. EDP Range, Threads Per inch Capacity, Pitch Diameter 575AP 56159 7-9 0-1" 575BP 56160 10-13 575CP 56161 14-18 575DP 56162 20-24 575EP 56163 28-30 575FP 56164 32-40 585AP 56165 4 1/2 - 6 1-2" 585BP 56166 7-9 585CP 56167 10-13 585DP 56168 14-18 585EP 56169 20-24 585FP 56170 28-30 575M and 585M Screw Thread Micrometers (0.01mm Graduation) Cat. No. EDP Range, Pitch in mm Capacity, Pitch Diameter 575MAP 56321 3-4 0-25mm 575MBP 56322 2-2.5 575MCP 56323 1.25-1.75 575MDP 56324 0.75-1 575MEP 56325 0.5-0.7 575MFP 56326 0.35-0.45 585MAP 56327 4.5-6 25-50mm 585MBP 56328 3-4 585MCP 56329 2-2.5 585MDP 56330 1.25-1.75 Cases Cat. No. EDP Description 910 55397 Attractive protective case for 575 912 55399 Attractive protective case for 585 Swivel anvil available on special order – also in capacities over 2" (50mm). 575 sent in fitted case. 585 packed one in a box without case. 575AP 58 M icrometers