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Starrett Tool Index

Special Function Outside Micrometers

Screw Thread Micrometers for measuring Pitch Diameter

Starrett Screw Thread Micrometers for
measuring Pitch Diameter

Screw Thread Micrometers for measuring Pitch Diameter by Starrett

No. 575 Series (0-1")
No. 575M Series (0-25mm)

No. 585 Series (1-2")
No. 585M Series (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
Starrett workmanship
Design allows 50% to 75% contact with the thread to be measured, thereby insuring contact with the pitch diameter at all times
Design also insures against contact with the root area of the thread
Tools are accurate to ±.0002" or 0.004mm

Starrett 575, 585 Series - Screw Thread Micrometers for measuring Pitch Diameter

No. 575AP 0-1" micrometer gages pitch diameter of a screw thread. This micrometer is read directly in inches in terms of pitch diameter, since with the anvil and spindle in the position shown in the drawing, the line AB corresponds to the 0 reading.

Series 575 and 585 - Inches

For measuring American Unified National series and Unified J series screw threads. Series 585 micrometers come with a one-inch standard at no extra cost.

Graduation - .001"

Range, Threads Per Inch	Capacity, Pitch Diameter	Catalog No.	Price
7-9	0-1"	575AP	$235.24
10-13		575BP	$235.24
14-18		575CP	$235.24
20-24		575DP	$235.24
28-30		575EP	$235.24
32-40		575FP	$235.24
4 1/2-6	1-2"	585AP	$266.49
7-9		585BP	$266.49
10-13		585CP	$266.49
14-18		585DP	$266.49
20-24		585EP	$266.49
28-30		585FP	$266.49

Series 575M and 585M - Metric

For measuring I.S.O. metric and MJ screw threads. Series 585M micrometers come with a 25mm standard at no extra cost.

Graduation - 0.01mm

Range, Pitch in mm	Capacity, Pitch Diameter	Catalog No.	Price
3-4	0-25mm	575MAP	$235.24
2-2.5		575MBP	$235.24
1.25-1.75		575MCP	$235.24
0.75-1		575MDP	$235.24
0.5-0.7		575MEP	$235.24
0.35-0.45		575MFP	$235.24
4.5-6	25-50mm	585MAP	$266.49
3-4		585MBP	$266.49
2-2.5		585MCP	$266.49
1.25-1.75		585MDP	$266.49

Measuring tip:
These tools are accurate for general purposes, especially if set to a thread plug gage of the size to be measured. If higher accuracy is required, please refer to our No. 1130 Cone and Vee Thread Gaging System.

NOTE: Available on special order with swivel anvil – also in capacities over 2" (50mm).

NOTE: See reference tables, back of catalog for pitch diameters and other screw thread data.

	Starrett Micrometer Index
	Starrett Precision Measuring Tool Index

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Starrett Screw Thread Micrometers for measuring Pitch Diameter

Screw Thread Micrometers for measuring Pitch Diameter by Starrett

Starrett Screw Thread Micrometers for
measuring Pitch Diameter