Deltana 24SBM 24" Modern Surface Bolt, Heavy-Duty, Solid Brass

The 24SBM is a 24 inch modern surface bolt that mounts on the face of the door, on the inside. It's surface applied, so there's no mortising into the door edge and no through-bore. On a pair of doors it goes on the inactive leaf; on a single door it's a secondary bolt at the top or bottom. The 24 inch length is what lets you reach the head or the threshold from a comfortable hand height rather than reaching overhead.

Plan on it. Deltana's modern surface bolts are sold with an assortment of matching strikes offered alongside them, and the bolt is priced and sold each. Which strike you need depends on where the bolt lands: a floor strike or a floor bore if you're bolting down into the threshold, a jamb or header strike if you're going up into the frame. Match the strike finish to the bolt finish when you order.

It's the heavy-duty version of Deltana's modern surface bolt and is classed for commercial use. Reasonable for an office suite, a multi-family common door, or a hospitality back-of-house pair. What it is not is a keyed or auto-locking bolt: it throws and retracts by hand from the inside only, so it secures a leaf, it doesn't control access.

That's the standard use. Mount it on the inside face of the inactive leaf and throw it into a strike at the header, the threshold, or both if you run a pair of bolts. Once thrown, the inactive leaf becomes the strike for the active leaf's lock. Because it's surface applied there's no rod concealed in the door, so it works on a leaf that was never prepped for flush bolts, including existing doors you don't want to machine.

For a labeled opening, specify a bolt that carries the rating on its own record. The Ives SB1630 is a heavy duty steel locking surface bolt with a 1 inch throw and keyed security, carrying a 3-hour UL listed fire rating. The Ives SB1600 is a heavy duty steel bolt with a 3-1/2 inch throw and is fire rated, and the Ives SB1640 is a fire rated brass construction bolt with a 1 inch throw if the brass appearance matters. The Deltana 24SBM is a heavy-duty solid brass surface bolt intended for extra security on the inside of a door.

The Deltana 24SBM is a manually operated heavy-duty solid brass surface bolt mounted on the inside of the door for extra security. If the opening needs the bolt to hold itself or to be key controlled, the ABH HD1805 is a heavy duty surface bolt with an auto-locking 3/4 inch stainless steel bar, and the Ives SB1630 is a heavy duty steel locking surface bolt with 1 inch throw and keyed security. Those are different operating types, not finish variations, so confirm which behavior the opening requires before substituting.

The Deltana 24SBM is a heavy-duty surface bolt in solid brass, surface mounted on the inside face of the door. If the opening calls for a steel body instead of brass, the Ives SB1600 is a heavy duty steel surface bolt with a 3-1/2 inch throw and is fire rated, and the Ives SB360 is a heavy-duty steel surface bolt with a 1-1/4 inch throw in a 12 inch length. Both mount to the door face the same way the 24SBM does; the difference is body material and throw length, and the 24SBM at 24 inches is the longer bar of the group.

The Deltana 24SBM runs 24 inches, which suits a tall inactive leaf but overshoots a short application. In solid brass, the Emtek 8511 is a 6 inch solid brass surface bolt, and Delaney offers a solid brass surface bolt under part 410309. The Ives SB1640 is a brass construction bolt with a 1 inch throw and is fire rated. All are surface applied to the door face, so the prep approach is the same and only the bar length changes.

Solid brass, both the material and the substrate. That matters on an exterior pair of doors or a humid corridor where a plated steel bolt will eventually rust through the finish. It also means the unlacquered brass version will patina naturally rather than flaking.

Eight: polished brass, unlacquered brass, antique brass, oil rubbed bronze, brushed nickel, polished chrome, brushed chrome, and paint black. That spread covers most existing door hardware schedules, so if you're matching hinges and levers already on the building you can usually land it. Unlacquered brass is the one that will darken over time; the rest hold their look.

Length is about reach, not strength. A 6 inch bolt such as the Emtek 8511 solid brass surface bolt sits right where you mount it, so it's for a bolt at hand height or a low bolt you can bend to. The 24 inch 24SBM runs a long rod up the face of the door so the bolt engages the head frame while the operating knob stays down where a person can reach it without a ladder. On tall doors, transom-height leaves, or a bolt into the threshold on a big pair, that reach is the whole reason to buy the long one.

Depends what you're optimizing for. Staying in decorative solid brass, Delaney Hardware makes a solid brass surface bolt and a decorative solid brass surface bolt. For steel rather than brass in a utility opening, the Ives SB360 heavy-duty steel surface bolt has a 1-1/4 inch throw and comes in a 12 inch length. Trimco's 4800 Series is another commercial surface bolt line. Where the 24SBM wins is the combination of solid brass throughout, heavy-duty build, and the 24 inch reach.

No mortising. It's a surface mounted bolt, so it fastens to the door face and the only prep in the opening itself is for the strike, plus a floor bore if you're throwing down into a threshold. That's what makes it the practical choice on existing doors, hollow metal you don't want to cut, or a leaf already hung and finished.

They look similar on the door but they are specified differently. The Deltana 24SBM is a heavy-duty solid brass bolt in a modern profile, offered in Polished Brass, Unlacquered Brass, Antique Brass, Oil Rubbed Bronze, Brushed Nickel, Polished Chrome, Brushed Chrome and Paint Black. The Delaney BV7600 is a decorative solid brass surface bolt, and the Trimco 4800 Series is a surface bolt line. If matching an ornamental scheme across doors is the priority, the decorative bolts are the closer look; if the heavy-duty designation is what the spec calls for, the 24SBM carries it.

Throw is where these separate. The Ives SB1600 gives a 3-1/2 inch throw and the Ives SB360 a 1-1/4 inch throw, both heavy duty steel, while the Ives SB1630 and SB1640 each throw 1 inch. The ABH HD1805 uses a 3/4 inch stainless steel bar that auto-locks. The Deltana 24SBM is a 24 inch heavy-duty solid brass bolt rated for commercial use, with matching strikes available. Measure the gap between the door bottom or head and the strike point, then pick the throw that covers it.

If your Deltana hinges, levers, and kick plates are in polished brass, antique brass, oil rubbed bronze, brushed nickel, polished chrome, brushed chrome, unlacquered brass, or paint black, yes, the 24SBM is offered in that same finish. For a fleet of doors, order all the bolts in one finish code at once so they come from the same run.