Deltana SB35 3-1/2" Spring Bolt

For a fire door assembly, look at the Ives steel surface bolts instead. The Ives SB1600 is a heavy duty steel surface bolt with a 3-1/2 inch throw and is fire rated, and the Ives SB1630 is a heavy duty locking steel surface bolt with a 1 inch throw carrying a 3-hour UL listing with keyed security. Those are the ones to specify when the opening is a labeled pair.

For an opening seeing constant use, the ABH HD1805 is a heavy duty surface bolt with an auto-locking 3/4 inch stainless steel bar, and the Ives SB1600 and SB1640 are heavy duty steel and brass surface bolts respectively. The ABH HD1805's auto-locking action means the bolt secures itself when thrown rather than relying on spring tension the way the Deltana SB35 spring bolt does, which is the behavior that matters when maintenance staff are not there to check each leaf.

No. The SB35 is a spring bolt operated by hand from the side it is mounted on, with no key and no outside operation. If you need the inactive leaf secured with a key, the Ives SB1630 is a locking surface bolt with keyed security and a 1 inch throw.

A slide bolt stays wherever you push it. A spring bolt, like the Deltana SB35, is spring loaded so the action is quicker and it returns positively rather than drifting in the guide. On a pair that gets opened often, say a stockroom or a service corridor, that matters. Where you want a bar that simply parks in position and stays put, a solid brass slide type such as the Emtek 8511 or the Delaney solid brass surface bolt is the simpler part.

The Deltana SB35 is a 3-1/2 inch spring bolt built for tarnish resistance. If the specification calls for solid brass, the Delaney Solid Brass Surface Bolt and the Emtek 8511 solid brass surface bolt in a 6 inch length are both brass-bodied peers. The Emtek 8511's 6 inch body is longer than the SB35's 3-1/2 inch size, so check the clear space on the leaf between the rail and the stop before swapping one for the other.

Alongside the Deltana SB35 spring bolt, the Trimco 4800 Series surface bolts and the ABH HD1805 Series are both catalog series rather than single parts, which is what you want when you are specifying one bolt family across many openings and need the sizes and finishes to stay consistent from door to door. Ives also spans several bolt models - the SB1600, SB1630, SB1640, and SB360 - so a facility can hold one brand across fire rated and keyed openings.

Deltana builds the SB35 to resist tarnish, and the 32D satin stainless version is the finish to pick where humidity or handling is a factor. On a fully exposed exterior opening, stainless holds up better than a lacquered brass bolt, which is where the decorative brass options like the Delaney BV7600 belong instead, on interior doors.

The Deltana SB35 is a 3-1/2 inch spring bolt finished for tarnish resistance, with a plain functional profile. Where the bolt is visible on a front entry or an interior double door and the finish carries the room, the Delaney Decorative Solid Brass Surface Bolt is a decorative brass surface bolt, and the Emtek 8511 is a 6 inch solid brass surface bolt. Both are brass-bodied, so the finish will age and patina differently from a tarnish-resistant plated bolt.