Design Hardware UL Manual Flush Bolt (Wood Doors)

Throw is 3/4 inch with a 1 1/2 inch adjustable bolt head. The adjustable head is what does the work on a retrofit: it lets you take up gap variation at the head and the sill so the bolt lands in strikes that are already drilled, within the adjustment range. The supplied strike measures 15/16 x 2 1/4 inches, so if your current strike cutout is close to that footprint you're mortising very little.

The face plate is 1 x 6 3/4 inches, so that's the surface cutout in the door edge, and the rod sits on a 3/4 inch backset behind the face. Cast brass body. If you're routing a new leaf, that 1 inch face width is the number that decides whether the bolt clears the stile and any lock prep already in the edge.

Yes, and it's specified here: use the DPS-1 dust proof strike at the bottom so grit and debris don't pack the floor strike and stop the bolt from dropping. It's the most common reason a bottom flush bolt stops working a year after install. Order it separately, it is not part of the bolt.

The Design Hardware UL manual flush bolt is prepped for wood doors, so for hollow metal leaves use a metal-door bolt instead. The ABH 1855S manual flush bolt single is made for metal doors and carries the same 3/4 inch throw as the Design Hardware bolt. The ABH 1854 series is a manual flush bolt set with a fire bolt for metal doors, and the Ives FB457 is a manual flush bolt for metal doors supplied with a 12 inch rod length. All three are manual bolts like the Design Hardware unit; the difference is the door prep they are cut for.

No. The Design Hardware UL manual flush bolt is thrown and retracted by hand, so the inactive leaf stays bolted until someone operates it. For automatic release on a wood pair, the Ives FB41 is an automatic flush bolt set for wood doors with a 3/4 inch throw and a 90 minute fire rating, and the Ives FB42 is a top automatic flush bolt for wood doors with an auxiliary fire latch. The ABH 1860P/1862P automatic flush bolt pair is fire rated 3-hour with a thermal lock. Automatic bolts retract when the active leaf closes against the trigger; the manual Design Hardware bolt does not.

Not with the Design Hardware UL manual flush bolt - its bolt is operated by hand at the face plate, so anyone reaching the edge of the inactive leaf can throw it. Where the inactive leaf has to be under key control, the Adams Rite 1870 series is a cylinder-operated flushbolt with key control, and the Adams Rite 1877 is a cylinder-operated flushbolt for paired wood doors. Those are keyed at the bolt rather than lever-operated at the face, which is the functional difference from the Design Hardware manual bolt.

The Ives FB358 manual flush bolt is the nearest peer: it is a manual flush bolt with a 3/4 inch throw and a 1/2 inch bolt diameter, matching the 3/4 inch bolt throw of the Design Hardware UL manual flush bolt for wood doors. The Design Hardware bolt is cast brass with a 1 inch by 6-3/4 inch face plate, a 3/4 inch rod backset, and a 1-1/2 inch adjustable bolt head, and comes in 613 dark bronze, 626 satin chrome, and 606 satin brass. Both are manually operated, so both suit an inactive leaf that stays bolted until someone throws it by hand.

A pair of doors normally takes two bolts on the inactive leaf, one at the head and one at the sill, so order two per opening. Each bolt is the same part; the adjustable 1 1/2 inch bolt head handles the fit at either end. Plan on the DPS-1 dust proof strike for the floor location as well. Flush bolts are non-handed, they mortise into the edge of whichever leaf is inactive.

The Design Hardware bolt is a mortised edge bolt, so it needs a routed pocket in the door edge. Where you can't rout, or you're working a wood or glass door with a corner condition, look at the Trimco 3999 6 inch corner mount flushbolt with a rounded end or the 3999SE square end version. Orca Hardware also offers a 6 inch flush bolt with radius corners. Those mount differently and won't use the same prep as the mortised bolt.

The Design Hardware UL manual flush bolt is a single bolt with a 3/4 inch throw, a 1 inch by 6-3/4 inch face plate and its own 15/16 inch by 2-1/4 inch strike - you install one at the head and one at the sill if you want the leaf secured top and bottom, and each is thrown separately. The Adams Rite MS1880/MS1881 are two-point flushbolts with an interlock mechanism, and the Adams Rite MS2180 series is an auto-release two-point flushbolt with a Smartlock mechanism, meaning top and bottom bolts are linked and driven together rather than operated independently.

The Design Hardware UL manual flush bolt uses a 1 inch by 6-3/4 inch face plate. If the stile or rail will not take that length, the Trimco 3999 is a 6 inch corner mount flushbolt with a rounded end and the Trimco 3999SE is the 6 inch corner mount square end version; the Delaney 4108 is a 6 inch square end solid brass flush bolt and the Orca Hardware 86SQ is a 6 inch flush bolt with radius corners. Measure the available flat on the edge of the leaf before choosing, since the mortise has to clear the full face plate length.

No - the backset and throw differ, so the mortise and strike locations are not interchangeable. The Design Hardware UL manual flush bolt has a 3/4 inch bolt throw on a 3/4 inch rod backset. The International Door Closers FB-1202 is a square end flush bolt with a 5/8 inch throw and a 1/8 inch offset on a 7/8 inch backset, supplied with a guide. If you are replacing an existing bolt, confirm the backset in the leaf before ordering either one.

Three: 613 dark bronze, 626 satin chrome, and 606 satin brass. 626 is the one that matches most commercial lever and exit hardware on an existing building, 613 goes with dark bronze storefront and entry sets, and 606 matches satin brass trim. All three are the same cast brass bolt underneath.

3/4 inch is the standard commercial throw on a manual flush bolt and matches what most competing bolts give you, including the Ives FB358 manual flush bolt and the ABH 1855S, both rated at a 3/4 inch throw. Where you'd notice a difference is against a shorter-throw bolt: the International Door Closers FB-1202 throws 5/8 inch on a 7/8 inch backset, so it engages less and uses a different backset than the 3/4 inch backset here.

The body is cast brass rather than stamped, which is the material you want where the bolt gets thrown daily, in an apartment corridor pair or a school storeroom. Brass also won't seize the way a rusted steel rod can at a floor strike, though the DPS-1 dust proof strike is still worth adding at the sill to keep debris out of the bottom pocket.

The Design Hardware UL manual flush bolt is a face-mounted unit with a 1 inch by 6-3/4 inch plate and a 3/4 inch rod backset. Where the rod has to travel further into the stile, the Delaney 4101 is a 7 inch slide type mortise-in flush bolt and the Delaney 4363 is a 7 inch mortise extension flush bolt, both mortised into the edge of the leaf. Those change the door prep, so decide before the leaves are machined.

The Design Hardware UL manual flush bolt is sold as a single bolt in 613 dark bronze, 626 satin chrome and 606 satin brass, so one unit covers a bottom-only application; pair it with a DPS-1 dust proof strike so dirt does not block the floor strike. Among the peers, the ABH 1855S is a manual flush bolt single for metal doors with a 3/4 inch throw, and the ABH 1858 is a universal bottom fire bolt with manual operation. Match the choice to the leaf material - the Design Hardware bolt is the wood-door option.