GGM
A
B
AA
AB
BA
BB
AA1
AA2
AA3
AB1
AB2
AB3
BA1
BA2
BA3
BB1
BB2
SKD1
A
AA
AB
AA1
AA2
AA3
A1
AB1
AB2
AB3
SKD1
SKD2
AA
1AA
2AA
3AA
4AA
5AA
SKD1
SKD1
SKD2
SKD3
SKD4
SKD5
SKD6
Section 4 - 6
K
e
y
C
o
n
tr
o
l
&
R
e
c
o
rd
K
e
e
p
in
g
The following key symbols are the lock industry standard, used by manufacturers, BHMA, DHI and ALOA.
They should be used when specifying any master keyed system. The symbols are constructed as follows:
Abbreviation Key type
Symbolized by
Symbols or "keysets"
GGMK
great grand master key
GGM
GGM
GMK
grand master key
single letter
A, B, C, T
MK
master key
pair of letters
AA, AB, CC, BA, TR
CK
change key
letters and numbers
AA1, AB29, 17AA, SKD1
One level of keying—the most secure keying
Locks are never master keyed, but keyed alike (KA) or keyed different (KD). If you have two cylinders keyed
to SKD1, it is a keyed alike group.
Two levels of keying—simple master key system
Consists of a Master and change keys. Master key is named with an identical pair of letters, AA, BB,
CC, etc. The change key numbers go
in front of
the letter pair.
Three levels of keying—grand master key system
Consists of a Grand Master and multiple Master keys under the Grand. Change key numbers go
after
the
letter pair. The first letter of the master key symbols is the grand.
Four levels of keying—great grand master key system.
Consists of a Great Grand Master with multiple Grand Master “systems” under it. Change key numbers go
after
the letter pair.
The Standard Key Coding System
Summary of Contents for Peaks Preferred
Page 1: ...Technical Manual Preferred Classic ...
Page 3: ...Peaks Preferred Classic Notes ...
Page 4: ...Technical Manual Section 1 Introduction Preferred Classic ...
Page 12: ...Technical Manual Section 2 Product Information Preferred Classic ...
Page 19: ...Section 2 7 Product Information Peaks Preferred Classic Notes ...
Page 41: ...Section 2 30 Product Information Peaks Preferred Classic Notes ...
Page 42: ...Section 2 31 Product Information Peaks Preferred Classic Notes ...
Page 43: ...Section 2 32 Product Information Peaks Preferred Classic Notes ...
Page 44: ...Technical Manual Section 3 Key Cutting and Pinning Preferred Classic ...
Page 66: ...Section 3 22 Key Cutting Pinning Peaks Preferred Classic Notes ...
Page 67: ...Section 3 23 Key Cutting Pinning Peaks Preferred Classic Notes ...
Page 68: ...Preferred Classic Technical Manual Section 4 Key Control Record Keeping ...
Page 79: ...Section 4 11 Key Control Record Keeping Peaks Preferred Classic Notes ...
Page 80: ...Preferred Classic Technical Manual Section 5 Cylinder Installation Guide ...
Page 91: ...Section 5 11 Cylinder Installation Guide Peaks Preferred Classic Notes ...