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RE: slotted holes

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In this area, if you purchase a 2” slot punch, it is 2” 0/0 so when we call out slots, the length is O/O.



Dave Lowen


V 519 587 5797

F 519 587 5138

E jatech(--nospam--at)



V 519 749 9468

E jatech(--nospam--at)


From: S. Gordin [mailto:mailbox(--nospam--at)]
Sent: August 29, 2005 11:24 AM
To: seaint(--nospam--at)
Subject: slotted holes


Good morning!


Is the longer dimension of slotted holes measured between the centers or out-to-out? Are there any code references (preferably, details) indicating the correct way of dimensioning? What is the accepted industry practice?




Steve Gordin, SE

Irvine CA