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

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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
201 3/16 7/16 1/8 0.171 ± 0.005 0.139 ± 0.004
202 1/4 1/2 1/8 0.234 ± 0.005 0.139 ± 0.004
203 5/16 9/16 1/8 0.296 ± 0.005 0.139 ± 0.004
204 3/8 5/8 1/8 0.359 ± 0.005 0.139 ± 0.004
205 7/16 11/16 1/8 0.421 ± 0.005 0.139 ± 0.004
206 1/2 3/4 1/8 0.484 ± 0.005 0.139 ± 0.004
207 9/16 13/16 1/8 0.546 ± 0.007 0.139 ± 0.004
208 5/8 7/8 1/8 0.609 ± 0.009 0.139 ± 0.004
209 11/16 15/16 1/8 0.671 ± 0.009 0.139 ± 0.004
210 3/4 1 1/8 0.734 ± 0.010 0.139 ± 0.004
211 13/16 11/16 1/8 0.796 ± 0.010 0.139 ± 0.004
212 7/8 11/8 1/8 0.859 ± 0.010 0.139 ± 0.004
213 15/16 13/16 1/8 0.921 ± 0.010 0.139 ± 0.004
214 1 11/4 1/8 0.984 ± 0.010 0.139 ± 0.004
215 11/16 15/16 1/8 1.046 ± 0.010 0.139 ± 0.004
216 11/8 13/8 1/8 1.109 ± 0.012 0.139 ± 0.004
217 13/16 17/16 1/8 1.171 ± 0.012 0.139 ± 0.004
218 11/4 11/2 1/8 1.234 ± 0.012 0.139 ± 0.004
219 15/16 19/16 1/8 1.296 ± 0.012 0.139 ± 0.004
220 13/8 15/8 1/8 1.359 ± 0.012 0.139 ± 0.004
221 17/16 111/16 1/8 1.421 ± 0.012 0.139 ± 0.004
222 11/2 13/4 1/8 1.484 ± 0.015 0.139 ± 0.004
223 15/8 17/8 1/8 1.609 ± 0.015 0.139 ± 0.004
224 13/4 2 1/8 1.734 ± 0.015 0.139 ± 0.004
225 17/8 21/8 1/8 1.859 ± 0.018 0.139 ± 0.004
226 2 21/4 1/8 1.984 ± 0.018 0.139 ± 0.004
227 21/8 23/8 1/8 2.109 ± 0.018 0.139 ± 0.004
228 21/4 21/2 1/8 2.234 ± 0.020 0.139 ± 0.004
229 23/8 25/8 1/8 2.359 ± 0.020 0.139 ± 0.004
230 21/2 23/4 1/8 2.484 ± 0.020 0.139 ± 0.004
231 25/8 27/8 1/8 2.609 ± 0.020 0.139 ± 0.004
232 23/4 3 1/8 2.734 ± 0.024 0.139 ± 0.004
233 27/8 31/8 1/8 2.859 ± 0.024 0.139 ± 0.004
234 3 31/4 1/8 2.984 ± 0.024 0.139 ± 0.004
235 31/8 33/8 1/8 3.109 ± 0.024 0.139 ± 0.004
236 31/4 31/2 1/8 3.234 ± 0.024 0.139 ± 0.004
237 33/8 35/8 1/8 3.359 ± 0.024 0.139 ± 0.004
238 31/2 33/4 1/8 3.484 ± 0.024 0.139 ± 0.004
239 35/8 37/8 1/8 3.609 ± 0.028 0.139 ± 0.004
240 33/4 4 1/8 3.734 ± 0.028 0.139 ± 0.004
241 37/8 41/8 1/8 3.859 ± 0.028 0.139 ± 0.004
242 4 41/4 1/8 3.984 ± 0.028 0.139 ± 0.004
243 41/8 43/8 1/8 4.109 ± 0.028 0.139 ± 0.004
244 41/4 41/2 1/8 4.234 ± 0.030 0.139 ± 0.004
245 43/8 45/8 1/8 4.359 ± 0.030 0.139 ± 0.004
246 41/2 43/4 1/8 4.484 ± 0.030 0.139 ± 0.004
247 45/8 47/8 1/8 4.609 ± 0.030 0.139 ± 0.004
248 43/4 5 1/8 4.734 ± 0.030 0.139 ± 0.004
249 47/8 51/8 1/8 4.859 ± 0.030 0.139 ± 0.004
250 5 51/4 1/8 4.984 ± 0.035 0.139 ± 0.004
251 51/8 53/8 1/8 5.109 ± 0.035 0.139 ± 0.004
252 51/4 51/2 1/8 5.234 ± 0.035 0.139 ± 0.004
253 53/8 55/8 1/8 5.359 ± 0.035 0.139 ± 0.004
254 51/2 53/4 1/8 5.484 ± 0.035 0.139 ± 0.004
255 55/8 57/8 1/8 5.609 ± 0.035 0.139 ± 0.004
256 53/4 6 1/8 5.734 ± 0.035 0.139 ± 0.004
257 57/8 61/8 1/8 5.859 ± 0.035 0.139 ± 0.004
258 6 61/4 1/8 5.984 ± 0.035 0.139 ± 0.004
259 61/4 61/2 1/8 6.234 ± 0.040 0.139 ± 0.004
260 61/2 63/4 1/8 6.484 ± 0.040 0.139 ± 0.004
261 63/4 7 1/8 6.734 ± 0.040 0.139 ± 0.004
262 7 71/4 1/8 6.984 ± 0.040 0.139 ± 0.004
263 71/4 71/2 1/8 7.234 ± 0.045 0.139 ± 0.004
264 71/2 73/4 1/8 7.484 ± 0.045 0.139 ± 0.004
Glossary
FREE Publications
Negotiate Your Salary

Learn the best principles to negotiate the salary you deserve!

3D Scanners

A white paper to assist in the evaluation of 3D scanning hardware solutions.

Metal 3D Printing Design Guide

Direct Metal Laser Sintering (DMLS) 3D printing for parts with reduced cost and little waste.

Mechanical Engineers Outlook

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

more publications