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Guide for those interested in becoming a mechanical engineer. Includes qualifications, pay, and job duties.

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Guide for high quality and cost-effective plastic injection molding.

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STEM Career Outlook

Wages, employment opportunities, and growth projections for STEM jobs.

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Materials

Design

Processes

Units

Formulas

Math
 
AS 568A No. Covered Range
("W" is the O-ring cross-section diameter, also called the "width")
001 to 114 ID from 0.029" to 0.070" for W=0.040"; 0.042" for W=0.050"; 0.056" for W=0.060"; from 0.070" to 5.239" for W=0.070"; from 0.049" to 0.612" for W=0.103"
115 to 178 ID from 0.674" to 9.737" for W=0.103"
201 to 264 ID from 0.171" to 7.484" for W=0.139"
265 to 349 ID from 7.734" to 17.955" for W=0.139"; from 0.412" to 4.475" for W=0.210"
350 to 439 ID from 4.600" to 25.940" for W=0.210"; from 4.475" to 6.475" for W=0.275"
 
AS 568A No. Nominal Sizes (inch) Actual Sizes (inch)
ID OD Width ID Width
001 1/32 3/32 1/32 0.029 ± 0.004 0.040 ± 0.003
001 1/2 1/16 1/8 1/32 0.070 ± 0.004 0.040 ± 0.003
002 3/64 9/64 3/64 0.042 ± 0.004 0.050 ± 0.003
003 1/16 3/16 1/16 0.056 ± 0.004 0.060 ± 0.003
004 5/64 13/64 1/16 0.070 ± 0.005 0.070 ± 0.003
005 3/32 7/32 1/16 0.101 ± 0.005 0.070 ± 0.003
006 1/8 1/4 1/16 0.114 ± 0.005 0.070 ± 0.003
007 5/32 9/32 1/16 0.145 ± 0.005 0.070 ± 0.003
008 3/16 5/16 1/16 0.176 ± 0.005 0.070 ± 0.003
009 7/32 11/32 1/16 0.208 ± 0.005 0.070 ± 0.003
010 1/4 3/8 1/16 0.239 ± 0.005 0.070 ± 0.003
011 5/16 7/16 1/16 0.301 ± 0.005 0.070 ± 0.003
012 3/8 1/2 1/16 0.364 ± 0.005 0.070 ± 0.003
013 7/16 9/16 1/16 0.426 ± 0.005 0.070 ± 0.003
014 1/2 5/8 1/16 0.489 ± 0.005 0.070 ± 0.003
015 9/16 11/16 1/16 0.551 ± 0.007 0.070 ± 0.003
016 5/8 3/4 1/16 0.614 ± 0.009 0.070 ± 0.003
017 11/16 13/16 1/16 0.676 ± 0.009 0.070 ± 0.003
018 3/4 7/8 1/16 0.739 ± 0.009 0.070 ± 0.003
019 13/16 15/16 1/16 0.801 ± 0.009 0.070 ± 0.003
020 7/8 1 1/16 0.864 ± 0.009 0.070 ± 0.003
021 15/16 11/16 1/16 0.926 ± 0.009 0.070 ± 0.003
022 1 11/8 1/16 0.989 ± 0.010 0.070 ± 0.003
023 11/16 13/16 1/16 1.051 ± 0.010 0.070 ± 0.003
024 11/8 11/4 1/16 1.114 ± 0.010 0.070 ± 0.003
025 13/16 15/16 1/16 1.176 ± 0.011 0.070 ± 0.003
026 11/4 13/8 1/16 1.239 ± 0.011 0.070 ± 0.003
027 15/16 17/16 1/16 1.301 ± 0.011 0.070 ± 0.003
028 13/8 11/2 1/16 1.364 ± 0.013 0.070 ± 0.003
029 11/2 15/8 1/16 1.489 ± 0.013 0.070 ± 0.003
030 15/8 13/4 1/16 1.614 ± 0.013 0.070 ± 0.003
031 13/4 17/8 1/16 1.739 ± 0.015 0.070 ± 0.003
032 17/8 2 1/16 1.864 ± 0.015 0.070 ± 0.003
033 2 21/8 1/16 1.989 ± 0.018 0.070 ± 0.003
034 21/8 21/4 1/16 2.114 ± 0.018 0.070 ± 0.003
035 21/4 23/8 1/16 2.239 ± 0.018 0.070 ± 0.003
036 23/8 21/2 1/16 2.364 ± 0.018 0.070 ± 0.003
037 21/2 25/8 1/16 2.489 ± 0.018 0.070 ± 0.003
038 25/8 23/4 1/16 2.614 ± 0.020 0.070 ± 0.003
039 23/4 27/8 1/16 2.739 ± 0.020 0.070 ± 0.003
040 27/8 3 1/16 2.864 ± 0.020 0.070 ± 0.003
041 3 31/8 1/16 2.989 ± 0.024 0.070 ± 0.003
042 31/4 33/8 1/16 3.239 ± 0.024 0.070 ± 0.003
043 31/2 35/8 1/16 3.489 ± 0.024 0.070 ± 0.003
044 33/4 37/8 1/16 3.739 ± 0.027 0.070 ± 0.003
045 4 41/8 1/16 3.989 ± 0.027 0.070 ± 0.003
046 41/4 43/8 1/16 4.239 ± 0.030 0.070 ± 0.003
047 41/2 45/8 1/16 4.489 ± 0.030 0.070 ± 0.003
048 43/4 47/8 1/16 4.739 ± 0.030 0.070 ± 0.003
049 5 51/8 1/16 4.989 ± 0.037 0.070 ± 0.003
050 51/4 53/8 1/16 5.239 ± 0.037 0.070 ± 0.003
102 1/16 1/4 3/32 0.049 ± 0.005 0.103 ± 0.003
103 3/32 9/32 3/32 0.081 ± 0.005 0.103 ± 0.003
104 1/8 5/16 3/32 0.112 ± 0.005 0.103 ± 0.003
105 5/32 11/32 3/32 0.143 ± 0.005 0.103 ± 0.003
106 3/16 3/8 3/32 0.174 ± 0.005 0.103 ± 0.003
107 7/32 13/32 3/32 0.206 ± 0.005 0.103 ± 0.003
108 1/4 7/16 3/32 0.237 ± 0.005 0.103 ± 0.003
109 5/16 1/2 3/32 0.299 ± 0.005 0.103 ± 0.003
110 3/8 9/16 3/32 0.362 ± 0.005 0.103 ± 0.003
111 7/16 5/8 3/32 0.424 ± 0.005 0.103 ± 0.003
112 1/2 11/16 3/32 0.487 ± 0.005 0.103 ± 0.003
113 9/16 3/4 3/32 0.549 ± 0.005 0.103 ± 0.003
114 5/8 13/16 3/32 0.612 ± 0.009 0.103 ± 0.003
Glossary
FREE Publications
Mechanical Engineers Outlook

Guide for those interested in becoming a mechanical engineer. Includes qualifications, pay, and job duties.

Injection Molding Design Guide

Guide for high quality and cost-effective plastic injection molding.

Selecting the Right 3D Printer

Discover how to choose the right 3D printer for your needs and the key performance attributes to consider.

STEM Career Outlook

Wages, employment opportunities, and growth projections for STEM jobs.

more publications