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S-2 Coupler Standards

S-2

NAME OF SCALE
Alpha
Numeric		 PROPORTION Coupler Height REMARKS
1" 1:12 2.875"
(73.02 mm)		  
3/4" 1:16 2.250
(57.15 mm)		  
F, Proto:20.32 1:20.32 1.698"
(43.12 mm)		  
Proto:20.32n3 1:20.32 1.280"
(32.50 mm)		  
Fn3 1:20.32 1.125"
(28.57 mm)		  
G 1:20-1:32 1.125
(28.57 mm)

Knuckle
G 1:20-1:32 .750
(19.05 mm)

Loop & Hook
Proto:32 1:32 1.078"
(27.38 mm)		  
# I 1:32 1.063"
(27.00 mm)		  
# 1n3, Proto:32n3 1:32 .813"
(20.64 mm)		  
O 1:48 .688"
(17.47 mm)		  
On3 1:48 .563"
(14.30 mm)		  
On2 1:48 .344"
(8.74 mm)		  
S 1:64 .531"
(13.48 mm)		  
Sn3 1:64 .4063"
(10.32 mm)		  
OO 1:76.2 .453"
(11.50 mm)		  
HO 1:87.1 .391"
(9.93 mm)		  
HOn3 1:87.1 .298"
(7.57 mm)		  
HOn2 1:87.1    
TT 1:120 .281
(7.14 mm)		  
TTn3 1:120 .219"
(5.56 mm)		  
N 1:160 .216"
(5.48 mm)

 
Nn3 1:160 .154"
(3.91 mm)		  
Z 1:220 .154"
(3.91 mm)