There are many couplers identified in the AAR Rules. They are generally considered as Type E, F &E/F in design (FR is included in the F type ). The type of coupler required depends on the type of car and its use .

l  E type coupler:  Type of E coupler have an E-type head with a horizontal slot

through which the draft or cross key passes

 Type :E60EE (E60DE) , SBE60EE ,SBE60DE ,SBE67DE,SE67DE

 Component part :  E50BE、 E42AE(E42BE) 、E40AE 、E24B 、E25B、

 E2A、 E2、 E6A、 E30A 、 C10 、C2,

Widely used vehicle: Hopper car、Box car 、 and Flat car

Similar Chinese coupler of ：#13 coupler which is widely used on the Chinese freight wagon

All type E coupler are furnished with bodies ,knuckled and locks of quenched and tempered grade E steel . Grade E material is identified by the letter E at the end of the item Catalog Number

Type E Couplers and parts are regulated by the following AAR Specifications and Interchange Rules:

Ø  M-118 Knuckle Pins & Shank Connecting Pins

Ø  M-201 General for Steel Castings

Ø  S-172 Inspection & Maintenance on Cars

Ø  M-211 Purchase & Acceptance

Ø  M-212 Secondhand & Reconditioned

Ø  Rule 16 Type E Couplers & Parts

Ø  Rule 17 E/F Couplers & Parts

Ø  Rule 18 Type F Couplers & Parts

Ø  Rule 19 Yokes for Type E Couplers

Ø  Rule 20 Yokes for Type F and E/F Couplers

Ø  Rule 21 Front Follower Blocks

Ø  Rule 88 Couplers & Parts Required for Car Acceptance

Ø  Rule 90 Couplers & Parts Prohibited in Interchange