GENERAL MOTORS IGNITION LOCKS

Through the mid-1960s, General Motors divisions basically used two styles of the same in-dash ignition lock. For simplicity, I remember them as the concave and the “cowboy hat” models. For most applications they were interchangeable. Both styles of...


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When the O5000-O6999 code series is used with 75 groove keyway locks, use the following depths of cut:
1- .315”          
2- .290”          
3- .265”          
4- .240”

Use HPC card CX215 or the Ilco card 567 for 75 groove keys.
When the O5000-O6999 code series is used with 93 groove keyway locks, use the following four depths of cut:
1- .325”           2- .305”           3- .285”           4- .265”

Use HPC card CX263 or the Ilco card 2020 for 93 groove keys.

When the O5000-O6999 began using the 93 groove key, they changed the depth dimensions using the dimensions from the G0001-G3631 code series spaces and depths. The reason was that a #4 depth in the 75 groove is much deeper (less blade remaining) than a #4 depth in the 93 groove.

For more information on automotive locks discussed in this article, contact your local locksmith distributor or STRATTEC Security Corp. at: 877-251-8798 or http://aftermarket.STRATTEC.com

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