Design Hardware Surface Bolts

Yes. Surface bolts mount on the face of the inactive leaf and throw a 1-1/8 inch bolt into a strike, so the inactive leaf is held top and bottom and the active leaf latches against it. That is the standard way to secure a door pair with no center mullion. The kit ships with a universal top strike and a mortise bottom strike, so both ends are covered without ordering strikes separately.

Projection is 1-5/16 inches off the door face, and the bolt itself is 3/4 inch high by 1/4 inch thick. Measure from the door face to anything the bolt housing would foul, an applied astragal, a stop, or a frame return. The overall plate is 2 inches wide, in either an 8 inch or a 12 inch length.

The bolt throws 1-1/8 inches past the housing, which covers a normal threshold or floor strike condition but not a deep undercut or a sloped floor with a big gap. If you have more than an inch of floor clearance to make up at the bottom of the inactive leaf, step up to a longer throw, the Ives SB1600 throws 3-1/2 inches and the Ives SB360 throws 1-1/4 inches.

No, strikes come in the box. A universal top strike and a mortise bottom strike are included, so you get the head condition and the floor condition covered. The bottom strike is a mortise type, meaning it drops into a pocket cut in the floor or threshold rather than surface mounting, so plan for that cut on the install.

For a fire rated opening, the Ives SB1630 is a heavy duty steel locking surface bolt with a 1 inch throw, keyed security, and a 3-hour UL listed fire rating. 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 that is also fire rated. The Design Hardware UL-SB is built from stainless steel or plated steel with a 1-1/8 inch throw and a 1-5/16 inch projection.

The ABH HD1805 is a heavy duty surface bolt with an auto-locking 3/4 inch stainless steel bar, which matches the 3/4 inch bolt height of the Design Hardware UL-SB and adds auto-locking action. The Ives SB360 is another heavy duty steel surface bolt, supplied in a 12 inch length with a 1-1/4 inch throw against the 1-1/8 inch throw of the UL-SB. The UL-SB itself comes in 8 inch and 12 inch overall lengths with a universal top strike and mortise bottom strike included.

Both throw the same 1-1/8 inch bolt. The length is how far the plate reaches from the strike, so it is about reach and appearance, not holding power. The 12 inch (overall 2 x 12 inches) gives a longer reach down from the head or up from the floor, which helps when a rail, a light, or a panel joint sits where the plate would land. The 8 inch (overall 2 x 8 inches) is the tighter fit on a narrow rail.

Four finishes are offered on the Design Hardware surface bolt, and both the 8 inch and 12 inch lengths come in all four: 606 satin brass, 613 dark bronze, 626 satin chrome, and 630 satin stainless steel. For a property standardizing across doors, 626 matches most commercial lever and closer hardware, and 630 matches stainless push and pull trim.

A surface bolt like this one mounts on the face of the door, so there is no door prep beyond screw holes, which makes it the retrofit answer on an existing leaf or a hollow metal door already hung. A flush bolt is morticed into the door edge and sits hidden, which looks cleaner and cannot be fouled, but it needs the door machined. If the door is already in place and you need the inactive leaf secured today, the surface bolt is the one you can install without pulling the door.

No. It is a manually operated bolt, thrown and retracted by hand at the door, with no cylinder or keying. Where you need the inactive leaf locked against someone inside the space, the Ives SB1630 is a locking surface bolt with keyed security and a 1 inch throw.

Yes. The Delaney 410309 is a solid brass surface bolt, the Delaney BV7600 is a decorative solid brass surface bolt, and the Emtek 8511 is a solid brass surface bolt in a 6 inch length. The Ives SB1640 is a fire rated surface bolt of brass construction with a 1 inch throw. The Design Hardware UL-SB is stainless steel or plated steel and is offered in 606 satin brass, 613 dark bronze, 626 satin chrome, and 630 satin stainless steel finishes.

The Emtek 8511 is a solid brass surface bolt in a 6 inch length, which is shorter than the Design Hardware UL-SB, whose smaller size is the UL-SB8 at an overall 2 inches by 8 inches. Measure the flat rail or stile width before ordering, because the bolt plate must lie fully on the flat and clear any glass stop or panel molding.

No, they are not interchangeable. A surface bolt like the Design Hardware UL-SB mounts on the face of the door with a 1-5/16 inch projection and needs no door edge machining, while a flush bolt is mortised into the door edge and requires routing the door. Face-mounted alternatives to the UL-SB include the ABH HD1805 heavy duty surface bolt with an auto-locking 3/4 inch stainless steel bar, the Trimco 4800 Series surface bolts, and the Ives SB360 heavy duty steel surface bolt in a 12 inch length.

The Design Hardware UL-SB covers both, as the UL-SB8 is an overall 2 inches by 8 inches and the UL-SB12 is an overall 2 inches by 12 inches, with the same 1-1/8 inch throw, the same 3/4 inch by 1/4 inch bolt, and the same universal top strike and mortise bottom strike across the range, in 606 satin brass, 613 dark bronze, 626 satin chrome, and 630 satin stainless steel. Among the alternates, the Ives SB360 is supplied in a 12 inch length and the Emtek 8511 in 6 inches, so matching two lengths from one series narrows the part count.

No handing to call out. The bolt mounts vertically on the face of the inactive leaf and throws up into the head or down into the floor, so the same part works on a left or right hand pair. All you specify is length, 8 inch or 12 inch, and finish.

The Delaney BV7600 is a decorative solid brass surface bolt, and the Delaney 410309 is a solid brass surface bolt in a plainer form. The Emtek 8511 is also solid brass, in a 6 inch length. The Design Hardware UL-SB is a utility surface bolt in stainless steel or plated steel, offered in 606 satin brass, 613 dark bronze, 626 satin chrome, and 630 satin stainless steel, with a 3/4 inch by 1/4 inch bolt.

The Trimco 4800 Series surface bolts and the ABH HD1805 Series are the closest series-level alternates, both offered as surface-mounted bolt lines rather than single sizes. The ABH HD1805 uses an auto-locking 3/4 inch stainless steel bar. The Design Hardware UL-SB is offered as the UL-SB8 at an overall 2 inches by 8 inches and the UL-SB12 at an overall 2 inches by 12 inches, with a 1-1/8 inch throw and both strikes included.