Deltana DCSB175 Sex Bolts for DC40 Door Closer (Set of 4)

The DCSB175 is a set of four steel sex bolts (barrel nuts) that pair with machine screws to clamp the Deltana DC40 door closer through the door rather than relying on screws biting into the door itself. It is the through-bolt hardware for a DC40 install, not a closer or an arm. Each set includes a #12 x 24mm machine screw specification, and the bolts are steel.

Through-bolting is how you get a closer to hold on a door that will not carry screw threads on its own, and the DCSB175 is the Deltana part that does it on a DC40. The four-bolt set sandwiches the door between the closer body and the bolt heads on the opposite face using #12 x 24mm machine screws. On a solid door with good screw purchase you can skip them; on anything where the screws would pull out under closing force, they are what keeps the closer on the door.

No. The DCSB175 is sized and finished for the Deltana DC40 and nothing else. For other brands you want that manufacturer's own accessory hardware, such as the Cal-Royal 900 Series door closer accessories kit or, for LCN, the 1260-18QF Quick Fix bracket kit. Mixing a bolt set across brands means the screw length and head will not match the closer's mounting holes.

No, they serve the same purpose but are not interchangeable between closers. The DCSB175 is a four-piece steel sex bolt set built specifically for Deltana's DC40 closer, using a #12 x 24mm machine screw. The Cal-Royal accessory kit is a door closer accessories kit for the Cal-Royal 900 Series. Fastener sets for surface closers are matched to the closer body and shoe they mount, so order the DCSB175 when the closer on the door is a DC40 and the Cal-Royal kit when it is a 900 Series unit.

Four finishes: Aluminum, Duro, Gold and White. Those are the same finish choices Deltana runs on the DC40 closer body, so you order the bolt set in whichever finish the closer is, and the exposed heads on the pull side of the door read as part of the closer instead of standing out.

One pack is four bolts, sold as a set. That covers the four mounting points on a DC40 closer body, so one set does one door. If you are through-bolting a run of openings in a building, order one set per closer.

The DCSB175 works with a #12 x 24mm machine screw. That is the thread and length the bolt barrel is cut for, so if you are replacing a lost screw or bolt on an existing DC40 through-bolt install, match that size rather than substituting a hardware store fastener.

The DCSB175 is fastening hardware only: four steel sex bolts sized to the DC40, in a #12 x 24mm machine screw. The LCN 1260-30 is a cush shoe support for door closers with 3-1/16 inch reveal compatibility, and the Dorma 15323 is a 1-1/2 inch offset bottom arm with cover, a standard duty arm carried without a fire rating. Those two are arm and shoe components that transmit the closer's motion to the frame; the Deltana part is what holds the closer body to the door. Replacing a worn arm or shoe calls for one of those, not for a bolt set.

Deltana classes the DCSB175 as commercial hardware, and the bolts are steel rather than a cast or plated pot metal. Steel is what you want here, because a through-bolt on a closer takes the full cycling load of the door every time it shuts.

No. The DCSB175 is a commercial steel sex bolt set dedicated to Deltana's DC40 and is offered in Aluminum, Duro, Gold and White so the fasteners match the closer finish. Other lines carry their own hardware: Cal-Royal publishes a 900 Series accessories kit for its commercial door controls, and LCN's 1260-18QF Quick Fix bracket kit is tied to the 1000 Series. Standardizing means standardizing on the closer model first; the fastener and accessory kits then follow that choice per opening.