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Master Keys - Square Serrated

• Material: 4140
• Heat Treat Rc 40-45
• Finish: Black Oxide


PART NO. A B C D E F WT. (lbs.)
A-8SK* .744 3/8 1-5/16 .101 .098 .200 .25
A-12SK* .995 1/2 1-11/16 .130 .124 .250 .25
A-18SK* 1.487 1/2 2-1/4 .130 .124 .250 .50
A-21SK* 1.487 1/2 2-1/2 .130 .124 .250 .52


Master Keys - Acme Serrated

• Material: 4140
• Heat Treat Rc 40-45
• Finish: Black Oxide


PART NO. A B C D E F WT. (lbs.)
A-12AK* 1.030/1.029 1/2 1-11/16 .130 .093/.091 .250 .20
A-15AK* 1.530/1.529 1/2 2-7/16 .130 .093/.091 .250 .45
A-21AK* 1.530/1.529 1/2 2-7/8 .130 .093/.091 .250 .50
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*SCREWS INCLUDED WITH MASTER KEYS