Rockwood 459 Spring Loaded Plunger Stop

The 459 is a foot-operated, spring loaded plunger. You step the plunger down and the rubber bumper at the bottom bears on the floor to grip and hold the door; lifting releases it. Because the holding force comes from friction on the floor rather than a floor-mounted strike, there is nothing to install in the finished floor.

Projection is 1-7/8 inches, with a body measuring 1-3/8 x 5-3/8 inches. That projection is what determines how much floor clearance the plunger has to cover, so check the gap under your door before ordering.

Yes. The Trimco 1257M Series plunger holder is the closest cross-brand counterpart, serving the same foot-operated plunger holder role. The Rockwood 459 itself is solid cast brass with a rubber bumper, spring loaded and foot operated, with a 1-3/8 inch by 5-3/8 inch footprint and 1-7/8 inch projection, and it ships with 3 each #8 x 3/4 inch oval head sheet metal screws. If you are matching an existing opening, compare the Trimco unit's mounting hole pattern and projection against those Rockwood figures before swapping, since the door face prep and the drop to the floor are what decide whether the substitution works.

It ships with 3 each #8 x 3/4 inch oval head sheet metal screws for surface mounting to the door face. On a hollow metal door those thread straight into the sheet; on a wood door they bite the stile. For anything else (through-bolting a glass or aluminum door, for instance) you supply your own fasteners.

Two finishes: 626 satin chrome and 605 bright brass. Both are cast brass bodies, so if your building is standardized on satin chrome lever trim the 626 will match, and 605 pairs with polished brass openings.

A plunger stop is the choice when you want the door held open on demand and you cannot or will not drill the finished floor, and when there is no wall behind the door to take a wall bumper. It mounts entirely on the door and holds by friction. If you only need to stop the door and never hold it, a wall bumper or floor stop is simpler and has no moving parts to wear; if you need positive holding at a fixed point, a floor-mounted hold-open is the better answer.

Trimco's 1257M Series plunger holder is the cross-brand equivalent in this category. It serves the same purpose, a door-mounted foot-operated holder, so it is the one to look at if your job is specified to Trimco hardware. Where the 459 is spelled out on a door schedule, order the Rockwood.

No. The Rockwood 459 takes replacement bumper No. 461B, which is the part to order when the rubber tip wears out. The Trimco 1257 Series is a separate manufacturer's plunger holder with its own bumper part, and the two are not interchangeable as wear parts even though the holders do the same job. Stock 461B bumpers for any 459 units in service and keep the Trimco replacements with the Trimco units.

Both are plunger-style holders mounted on the door face and operated by foot. The Rockwood 459 is specified as solid cast brass with a rubber bumper and comes in 605 bright brass and 626 satin chrome, with a 1-7/8 inch projection from the door. The Trimco offering is the 1257 Series plunger holder. If you are running one hardware standard through a portfolio, the deciding factors are usually finish match to existing lever and hinge hardware and whether the projection clears your floor coverings, so check the Trimco series' finish list and projection against the 459 figures rather than assuming a like-for-like drop in.

A plunger holder such as the Rockwood 459 or the Trimco 1257 Series holds a door open by dropping a spring-loaded, rubber-tipped plunger to the floor, so it needs a sound floor surface within reach of its 1-7/8 inch projection and it is not intended to stop the door short of a wall. If your goal is to protect a wall from the lever, you want a wall stop or floor stop rather than a plunger holder. If the door is fire rated and must be free to self-close, a hold-open device of any kind is generally not permitted unless it releases on alarm, which a mechanical foot-operated plunger does not do.

It's built for commercial use, with a solid cast brass body rather than a stamped or plated pot metal one. Rockwood stops of this kind go into institutional buildings, offices, retail, schools, detention, sports facilities, hotels and restaurants.