Trimco 3999- Flushbolt - 6" Corner Mount Rounded End

Both. The Trimco 3900 Series manual flush bolts, the 3999 included, are made for use on wood or metal doors, so the same part covers a hollow metal pair and a solid wood pair. If you need a flush bolt specified for metal doors only, the ABH 1855S single manual bolt is that kind of part.

The 3999 is a manual bolt: someone has to flip the stainless steel finger to throw or retract it, and the spring action locks it positively in either position. That works on an inactive leaf that stays shut most of the time, like a stockroom or equipment room pair. If the inactive leaf gets used often, or code requires the pair to self latch when it closes, go to an automatic set instead, such as the Ives FB41 automatic set for wood doors or the ABH 1860P/1862P automatic pair.

The Trimco 3999 has a 1 inch throw with a 1/2 inch bolt diameter. The Ives FB358 manual flush bolt is listed with a 3/4 inch throw and the same 1/2 inch bolt diameter, and the ABH 1855S manual flush bolt single for metal doors also carries a 3/4 inch throw. The International Door Closers FB-1202 is shorter still at 5/8 inch throw, with a 1/8 inch offset and 7/8 inch backset. If your strike pocket in the head frame or the floor was drilled for a deeper engagement, check the depth before swapping.

For a labeled opening, order a bolt that carries a fire rating in its own right. The ABH 1854 series manual flush bolt set includes a fire bolt for metal doors, the ABH 1858 universal bottom fire bolt is a manual-operation fire bolt, and the ABH 1860P/1862P automatic pair is fire rated 3-hour with a thermal lock. On the Ives side, the FB358 manual flush bolt and the FB457 with 12 inch rod for metal doors are both listed as fire rated, and the FB41 automatic set carries a 90 minute rating.

The Trimco 3999 is a 3/4 inch by 6 inch manual flush bolt with a 1 inch throw and 1/2 inch bolt diameter. The nearest match in size and operation is the Orca Hardware 6 inch flush bolt with radius corners, which shares the 6 inch face length and the rounded end profile. Among other brands, the Delaney 6 inch square end solid brass flush bolt is the same length but finishes with a square end rather than a rounded one, so the mortise cutout differs at the ends.

The 3999 is a manual flush bolt, meaning each leaf is thrown and retracted by hand at the bolt itself. For an inactive leaf that should self-latch as the active leaf closes, use an automatic flush bolt instead: the Ives FB41 automatic flush bolt set for wood doors, the Ives FB42 top automatic flush bolt for wood doors with auxiliary fire latch, or the ABH 1860P/1862P automatic flush bolt pair are all built for that operation.

Five finishes: 605 bright brass, 606 satin brass, 613 oil rubbed bronze, 625 bright chrome and 626 satin chrome. Those are standard BHMA finish numbers, so 626 satin chrome will sit alongside the 626 levers and closers already on a commercial opening, and 613 matches oil rubbed bronze trim. Trimco also builds the 3900 Series in most other architectural finishes on special order.

Yes. Trimco offers custom rod lengths on the 3900 Series, and the bolts can be custom ordered for special applications, which is what you need on an 8 foot or taller leaf where a standard bolt will not reach the head. If you would rather buy a stock long bolt, the Ives FB457 comes with a 12 inch rod for metal doors.

The Trimco 3999 is operated by hand at the bolt face, with no cylinder provision. If the inactive leaf has to be locked or released with a key, move to a cylinder-operated flushbolt: the Adams Rite 1870 series cylinder-operated flushbolt with key control, or the Adams Rite 1877 cylinder-operated flushbolt for paired wood doors when the pair is wood.

The Trimco 3999 has a 3/4 inch by 6 inch face. For a longer mortise face, the Delaney 7 inch slide type mortise-in flush bolt and the Delaney 7 inch mortise extension flush bolt both run 7 inches. If the requirement is actually rod length rather than face length, the Ives FB457 manual flush bolt is supplied with a 12 inch rod for metal doors.

No. The Trimco 3999 is a single flush bolt, so a pair of doors needing top and bottom securement takes two of them. The Adams Rite MS1880/MS1881 two-point flushbolts with interlock mechanism and the Adams Rite MS2180 auto-release two-point flushbolt with Smartlock mechanism drive top and bottom bolts from one operating point, which is a different preparation in the leaf entirely - they are not a drop-in for a 6 inch corner mount bolt.

It is built for commercial duty, not residential. The body is a high density extrusion and the operating finger is stainless steel rather than plated zinc, which is where cheaper bolts fail first. Trimco lists it for public buildings, commercial and industrial buildings, government and military facilities, retail and strip malls, and multifamily or mixed use.

The Trimco 3999 is a commercial flush bolt with an extruded body and stainless steel finger, offered in 605 bright brass, 606 satin brass, 613 oil rubbed bronze, 625 bright chrome and 626 satin chrome. For a residential or decorative pair, the Emtek flush bolts and the Delaney 6 inch square end solid brass flush bolt are the residential-line alternatives in the same function.