Starrett 575, 585 Screw Thread 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 Features

• 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 Features

• 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 Features

• 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.

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