24 • Schlage • A-Series service manual
Parts and Accessories
Cylinder Units and Parts
Schlage locks are provided with cylinder units precision built to extremely close tolerances and the highest standards of
accuracy. Phosphor bronze springs, nickel silver keys, and pins are used throughout the Schlage offering. The best
combination of materials is used to ensure the manufacture of cylinders with ease of operation and long wear. To order locks
less cylinder units, change product suffix letter "P" and "L". Example: A53LD. Primus® cylinders are available when key
control and physical security are important concerns.
Cylinder Units
Standard
Cylinders
Primus Cylinders
Descriptions
Design
High Security
Controlled Access
XP
21-002
20-524
20-724
20-524-XP
20-724-XP
6 Pin unit
All except ORB, COM,
PLA
21-002-122
20-524-122
20-724-122
20-524-122-XP
20-724-122-XP
6 Pin unit
(except A73 & A85)
ORB, COM, PLA
21-002-149
20-524-149
20-724-149
20-524-149-XP
20-274-149-XP
6 Pin unit (A73)
ORB, COM, PLA
21-003
Not Available
6 Pin Indicator unit (A83)
All except ORB, COM,
PLA
21-003-168
6 Pin indicator unit (A83)
ORB, COM, PLA
21-002
Standard
Cylinder
21-003
Hotel
Function
Indicator
Cylinder
20-524
Primus High
Security
U.L. 437
Listed
20-724
Primus
Controlled
Access
20-524-XP
Hotel Function
Indicator
Cylinder
20-724-XP
Standard
Cylinder
Hotel Function Indicator Cylinder
Hotel Function Indicator Cylinder w/ ORB Knob
Spacer
Important: Use only graphite or similar material
for cylinder lubrication. Under no
circumstances should any other type of
material be introduced into the cylinder.
Summary of Contents for A Series
Page 1: ...A Series Service manual ...
