7/16 - 32 32-UN - Basic Thread Dimensions

Property Inch mm
Nominal Diameter 0.437 11.1
Pitch (TPI)32
Pitch (Distance) 0.0313 0.795
Pitch Diameter 0.4167 10.584
Minor Diameter 0.3998 10.155
Thread Height 0.0169 0.429
Addendum 0.0101 0.257
Crest (External)
Root (Internal)		 0.0039 0.099
Tap Drill Size
(75% depth)		 0.406 10.32
Lead Angle
(Single Start)		 1.37°
Thread Family Unified Constant Pitch 32 TPI (32-UN)
Relevant Standards ASME B1.1-2003
Equivalent Metric ThreadM11 X 0.75

For more threading data scroll down, or use the Thread Calculator

Table of Content

7/16 - 32 32-UN Possible Thread Classes

External Threads

Choose tolerance class: 2A, 3A

Metric ISO External Thread - Tolerance sketch

Internal Threads

Choose tolerance class: 2B, 3B

Metric ISO Internal Thread - Tolerance sketch

7/16 - 32 32-UN 2A (External)

* Permisable values for thread Class 2A

# Description Value (Inch) Value (mm)
es Allowance 0.001 (Ref) 0.025 (Ref)
d Major Diameter 0.43 - 0.436 10.922 - 11.074
d2 Pitch Diameter 0.4125 - 0.4157 10.478 - 10.559
d3 Minor Diameter
(UNR Only)		 0.3988 (Ref) 10.13 (Ref)
α Varation of 30° anngle (+/-) 1.5°
P Varation of pitch (+/-) 0.0009 (Ref) 0.023 (Ref)

* Values are calculated for Length of engagement of 5xPitch. For calculations of different engagement length use the Thread Calculator

* Back to Thread Class Selection

7/16 - 32 32-UN 3A (External)

* Permisable values for thread Class 3A

# Description Value (Inch) Value (mm)
es Allowance 0 (Ref) 0 (Ref)
d Major Diameter 0.431 - 0.437 10.947 - 11.1
d2 Pitch Diameter 0.4143 - 0.4167 10.523 - 10.584
d3 Minor Diameter
(UNR Only)		 0.3998 (Ref) 10.155 (Ref)
α Varation of 30° anngle (+/-) 1.5°
P Varation of pitch (+/-) 0.0007 (Ref) 0.018 (Ref)

* Values are calculated for Length of engagement of 5xPitch. For calculations of different engagement length use the Thread Calculator

* Back to Thread Class Selection

7/16 - 32 32-UN 2B (Internal)

* Permisable values for thread Class 2B

# Description Value (Inch) Value (mm)
D1 Minor Diameter 0.403 - 0.411 10.236 - 10.439
D2 Pitch Diameter 0.4167 - 0.4209 10.584 - 10.691
D Major Diameter 0.4370 (Min) 11.1 (Min)
α Varation of 30° anngle (+/-) 1.5°
P Varation of Pitch (+/-) 0.0012 (Ref) 0.03 (Ref)

* Values are calculated for Length of engagement of 5xPitch. For calculations of different engagement length use the Thread Calculator

* Back to Thread Class Selection

7/16 - 32 32-UN 3B (Internal)

* Permisable values for thread Class 3B

# Description Value (Inch) Value (mm)
D1 Minor Diameter 0.4032 - 0.4089 10.241 - 10.386
D2 Pitch Diameter 0.4167 - 0.4198 10.584 - 10.663
D Major Diameter 0.4370 (Min) 11.1 (Min)
α Varation of 30° anngle (+/-) 1.5°
P Varation of Pitch (+/-) 0.0009 (Ref) 0.023 (Ref)

* Values are calculated for Length of engagement of 5xPitch. For calculations of different engagement length use the Thread Calculator

* Back to Thread Class Selection

Tap Drill Sizes for 7/16 - 32 32-UN

  • If not specified, assume a thread depth of 75%.
  • You can learn more about thread depth in tapping here.
  • To get the tap drill size in other depths, use our Tap Drill Size Calculator .
Thread Depth Tap Drill Size (Inch) Tap Drill Size (mm)
55% 0.415 10.53
60% 0.413 10.48
65% 0.411 10.43
70% 0.409 10.38
75% 0.407 10.33
80% 0.405 10.27
85% 0.402 10.22

Over Wire Measurements for 7/16 - 32 32-UN


* OverWire is a measuring method to obatin the pitch diameter of threads. It is mostly used when a manufacturer does not have a Go/Nogo gauge for a thread. You can learn more about it here

Inch mm
Permissible Wire Diameter Range 0.0158 - 0.0316 0.402 - 0.803
Ideal Wire Diameter 0.0181 0.459
Possible Wires
From Standard Sets		 * 0.016
* 0.018
* 0.0193
* 0.0206
* 0.0214
* 0.0222
* 0.0241
* 0.0262
* 0.0289
 * 0.404
* 0.433
* 0.462
* 0.52
* 0.577
* 0.722

Once you knoe your wire diameter, you need to find out what is the premissable Measurement for your pitch diameter (Depending on the class). Use our Over Wire Calculator to find out!


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