A system comprising a type H tightlock coupler comprising a channel and an inner chamber, the channel running from a top side of the type H tightlock coupler to the inner chamber, and an anti-creep shelf disposed on an interior surface of the inner chamber, a plug comprising a first surface operable to contact the anti-creep shelf, the plug configured to fit at least partially within the channel, a link comprising a second surface operable to contact the anti-creep shelf and a hook, the link configured to fit at least partially within the channel, and a lock comprising a slot operable to receive the hook, the lock configured to fit at least partially within the inner chamber.

A railcar coupler may include a coupler head comprising a shank and a head portion, the head portion defining a cavity for receiving a knuckle, a thrower, and a lock. The cavity can include a top pulling lug, a bottom pulling lug, and a thrower retaining lug. The top pulling lug can be configured to engage an upper knuckle pulling lug, and the bottom pulling lug being can be configured to engage a lower knuckle pulling lug. During operation of the railcar coupler, the ratio of the stress between the top pulling lug and the bottom pulling lug can be configured to be better balanced to help extend the life of the railcar coupler assembly.

A railcar coupler may include a coupler head comprising a shank and a head portion, the head portion defining a cavity for receiving a knuckle, a thrower, and a lock. The cavity can include a top pulling lug, a bottom pulling lug, and a thrower retaining lug. The top pulling lug can be configured to engage an upper knuckle pulling lug, and the bottom pulling lug being can be configured to engage a lower knuckle pulling lug. During operation of the railcar coupler, the ratio of the stress between the top pulling lug and the bottom pulling lug can be configured to be better balanced to help extend the life of the railcar coupler assembly.

An apparatus for maintaining a railcar coupler key in position to releasably secure a railcar coupler shank to a yoke accommodated in a sill of a railcar. The railcar coupler key retainer apparatus includes an elongated key stop adapted to be releasably secured against an interior surface of a sill side wall defining an elongated slot. The key stop is configured with a flange portion which projects beyond an exterior surface of the sill side wall defining the slot. The flange portion defines a through bore having a closed margin. A retainer is mounted to the exterior surface of the sill side wall defining the elongated slot and defines a through bore which aligns with the through bore in the flange portion of the key stop when the key stop abuts with a closed end of the elongated slot defined by the side wall of the sill. A locking member is received in the through bores in the key stop and retainer to releasably secure the key stop to the interior surface of the sill side wall and thereby maintaining the railcar key retainer apparatus in position to maintain the railcar coupler key between the side walls of the sill and in position to secure the yoke to the coupler shank.

An apparatus for maintaining a railcar coupler key in position to releasably secure a railcar coupler shank to a yoke accommodated in a sill of a railcar. The railcar coupler key retainer apparatus includes an elongated key stop adapted to be releasably secured against an interior surface of a sill side wall defining an elongated slot. The key stop is configured with a flange portion which projects beyond an exterior surface of the sill side wall defining the slot. The flange portion defines a through bore having a closed margin. A retainer is mounted to the exterior surface of the sill side wall defining the elongated slot and defines a through bore which aligns with the through bore in the flange portion of the key stop when the key stop abuts with a closed end of the elongated slot defined by the side wall of the sill. A locking member is received in the through bores in the key stop and retainer to releasably secure the key stop to the interior surface of the sill side wall and thereby maintaining the railcar key retainer apparatus in position to maintain the railcar coupler key between the side walls of the sill and in position to secure the yoke to the coupler shank.