This industry leading coupler features New Generation AAR Type "E" "Prototype" Head Medium Overset Metal Couplers, and #850 O Scale centering spring and comes complete with Plastic Gearboxes and lids The #742 Metal Coupler may be mounted with the included #817 Plastic Gearbox or #818 Metal Gearbox (sold seperatly), #819 Extended Metal Gearbox (sold seperatly).
It is not recommended to use a metal coupler directly on a metal surface or in a metal draft gearbox to avoid possible electrical crossover and shorting that may cause damage.
#742 Coupler Instructions
Two pair per package
UPC: 765484007425
  Made in the U.S.A.
O-Scale
New Generation AAR Type "E" "Prototype" Head:
Simple Drop in Design
Trouble Free Operation
Hidden Knuckle Spring
AAR Type "E" Coupler Style
Compatible with Kadee® O-Scale Couplers
World-Renowned Quality & Performance
They just Last & Last & Last...
Package Includes:
(4) Each #742 Type "E" "Prototype" Metal Couplers - Medium Overset Shank
(4) Each #817 Plastic Gearboxes & lids
(5) Each #850 O Scale Centering Springs
#742 Metal Coupler Features:
Material
 -  Metal
Shank Length
 -  Medium (47/64") (Knuckle pulling face to center hole of Draft Gearbox)
Coupler Offset
 -  Overset
Centering Spring
 -  #850 O Scale Centering Springs
Head
 -  New Generation AAR Type "E" "Prototype" Head
Works With
 -  #817, #818, #819 Draft Gearboxes
#817 Plastic Draft Gearboxes & Lids Features:
Material
 -  Plastic
Dimensions
 -  25/32"L x 1/2"W x 7/32"H
Works With
 -  #740, #742, #745, #746, #747, #800, #801, #804, #805, & #816 Couplers
Mounting Specifications:
Mounting Height
 -  57/64"
Centerline
 -  1 1/16"
Trip Pin Height
 -  1/16"
Mounting Holes
 -  2-56 Insulated Screws are the most commonly used. (Screw length will vary)
Recommended Tools:
#812Â O Scale Coupler Height Gauge
#231Â Greas-em Dry Graphite Lubricant
#237Â Coupler Trip Pin Pliers
#240Â Double Headed Pin Vise
#241Â Dual Tool Manual Uncoupling Tool and Spring Pick
#246Â Tap (2-56) and Drills (#50 and #43)