engineering fundamentals 4-Thread Series, 4-UN and 4-UNR
Directory | Career | News | Standards | Industrial | SpecSearch®

Design Home
Screw Threads
Thread System
Unified Screw Threads
Constant Pitch Series
  4 UN and 4 UNR
  6 UN and 6 UNR
  8 UN and 8 UNR
  12 UN and 12 UNR
  16 UN and 16 UNR
  20 UN and 20 UNR
  28 UN and 28 UNR
  32 UN and 32 UNR
Metric Screw Threads
Torque in Bolts
Introduction
Torque Calculator
Resources
Bibliography


Login

Home Membership Store Forum Search Member Calculators

Materials
Design
Processes
Units
Formulas
Math
 
Size Basic Major Diameter Basic Pitch Diameter Minor Diameter Minor Dia. Area Tensile Stress Area
Size Primary Size Secondary External Thread Internal Thread
inch inch inch inch inch inch sq. inch sq. inch
2½*   2.5000 2.3376 2.2023 2.2294 3.72 4.00
  25/8 2.6250 2.4626 2.3273 2.3544 4.16 4.45
23/4*   2.7500 2.5876 2.4523 2.4794 4.62 4.93
  27/8 2.8750 2.7126 2.5773 2.6044 5.11 5.44
3*   3.0000 2.8376 2.7023 2.7294 5.62 5.97
  31/8 3.1250 2.9626 2.8273 2.8544 6.16 6.52
3¼*   3.2500 3.0876 2.9523 2.9794 6.72 7.10
  33/8 3.3750 3.2126 3.0773 3.1044 7.31 7.70
3½*   3.5000 3.3376 3.2023 3.2294 7.92 8.33
  35/8 3.6250 3.4626 3.3273 3.3544 8.55 9.00
33/4*   3.7500 3.5876 3.4523 3.4794 9.21 9.66
  37/8 3.8750 3.7126 3.5773 3.6044 9.90 10.36
4*   4.0000 3.8376 3.7023 3.7294 10.61 11.08
  41/8 4.1250 3.9626 3.8273 3.8544 11.34 11.83
4¼   4.2500 4.0876 3.9523 3.9794 12.10 12.61
  43/8 4.3750 4.2126 4.0773 4.1044 12.88 13.41
4½   4.5000 4.3376 4.2023 4.2294 13.69 14.23
  45/8 4.6250 4.4626 4.3273 4.3544 14.52 15.1
43/4   4.7500 4.5876 4.4523 4.4794 15.4 15.9
  47/8 4.8750 4.7126 4.5773 4.6044 16.3 16.8
5   5.0000 4.8376 4.7023 4.7294 17.2 17.8
  51/8 5.1250 4.9626 4.8273 4.8544 18.1 18.7
5¼   5.2500 5.0876 4.9523 4.9794 19.1 19.7
  53/8 5.3750 5.2126 5.0773 5.1044 20.0 20.7
5½   5.5000 5.3376 5.2023 5.2294 21.0 21.7
  55/8 5.6250 5.4626 5.3273 5.3544 22.1 22.7
53/4   5.7500 5.5876 5.4523 5.4794 23.1 23.8
  57/8 5.8750 5.7126 5.5773 5.6044 24.2 24.9
6   6.0000 5.8376 5.7023 5.7294 25.3 26.0
inch inch inch inch inch inch sq. inch sq. inch
Size Primary Size Secondary Basic Major Diameter Basic Pitch Diameter External Thread Internal Thread Minor Dia. Area Tensile Stress Area
Size Minor Diameter
* Standard Sizes of the UNC series
Top of Page
Home  Membership  About Us  Privacy  Disclaimer  Contact  Advertise

Copyright © 2009 eFunda, Inc.