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Metric Thread Dimensions Guide

The document provides specifications for metric M9 coarse and fine thread series, including dimensions for external and internal threads, wire diameters, constants, and tap drill sizes. It notes that the screw thread dimensions are calculated using data and formulas from recognized national and international standards.

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243 views1 page

Metric Thread Dimensions Guide

The document provides specifications for metric M9 coarse and fine thread series, including dimensions for external and internal threads, wire diameters, constants, and tap drill sizes. It notes that the screw thread dimensions are calculated using data and formulas from recognized national and international standards.

Uploaded by

cafortin
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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Metric M Profile - Coarse And Fine Pitch Series

Data for M9 x 0.5-6g and M9 x 0.5-6H


Values are displayed in inch units. Pre-coat values are in parentheses.
External PD tolerance is based on a length of engagement of 0.1366
Internal PD tolerance is based on a length of engagement of 0.1366

External Thread Internal Thread


M9 x 0.5-6g M9 x 0.5-6H Wire Diameters
Max . . . . . . . . . . . 0.01989
Allowance . . . . . . . . 0.0008 Allowance . . . . . . . . 0.0000 Min . . . . . . . . . . . 0.00994
Best . . . . . . . . . . 0.01136
Major Diameter Minor Diameter Alternate . . . . . . . . 0.01136
Max . . . . . . . . . . . 0.3535 Min . . . . . . . . . . . 0.3330
Min . . . . . . . . . . . 0.3494 Max . . . . . . . . . . . 0.3385 Constants
Mean . . . . . . . . . . . 0.3518 Mean . . . . . . . . . . . 0.3358 Best . . . . . . . . . . 0.01705
Alternate . . . . . . . . 0.01705
Pitch Diameter Pitch Diameter
Max . . . . . . . . . . . 0.3407 Min . . . . . . . . . . . 0.3415 Measurement Over Wires
Min . . . . . . . . . . . 0.3374 Max . . . . . . . . . . . 0.3460 Max . . . . . . . . . . . 0.3578
Tol . . . . . . . . . . . 0.0033 Tol . . . . . . . . . . . 0.0045 Min . . . . . . . . . . . 0.3545

Minor Diameter Major Diameter


Max . . . . . . . . . . . 0.3322 Min . . . . . . . . . . . 0.3543
Min . . . . . . . . . . . 0.3253 Max . . . . . . . . . . . 0.3616

Threads Per Inch . . . . . . --


Root Radius Height
Pref . . . . . . . . . . . 0.0028 Basic . . . . . . . . . . 0.0107 Starts . . . . . . . . . . . . 1
Min . . . . . . . . . . . 0.0025
Coating Buildup Pitch . . . . . . . . . . 0.0197
Max . . . . . . . . . . . 0.0000
Height Lead . . . . . . . . . . . 0.0197
Min . . . . . . . . . . . 0.0000
Basic . . . . . . . . . . 0.0121
Lead Angle . . . . . . . . 1.054

Coating Buildup Included Angle . . . . . . . 60°


Tap Drills-Cut Tap Percent Thread
Max . . . . . . . . . . . 0.0000
Drill Size Diameter Percent Diameter Spec . . . . . ASME B1.13M-2005
Min . . . . . . . . . . . 0.0000
8.30mm --- 0.3268 100% -- 0.3287
21/64 --- 0.3281 90% -- 0.3313
8.40mm --- 0.3307 80% -- 0.3339
The screw thread dimensions Q --- 0.3320
75% -- 0.3351
displayed here are calculated 70% -- 0.3364
using data and formulas found 8.50mm --- 0.3346
65% -- 0.3377
in recognized national and 8.60mm --- 0.3386 60% -- 0.3390
international standards and R --- 0.3390 55% -- 0.3403
specifications.
8.70mm --- 0.3425 50% -- 0.3415

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