Lockwood Synergy® 3541 Short Backset Mortice Hook Bolt Lockwood Synergy® 3541 Short Backset Mortice Hook Bolt Lockwood Synergy® 3541 Short Backset Mortice Hook Bolt Short backset, swing-bolt deadlocks suitable for narrow stile sliding and swing doors. Positive action deadbolt is hooked to engage and lock into a latching or security strike when the bolt is in the thrown position. Deadbolt is locked or unlocked by either key, turnknob, escape turn or lever handle. Specification Materials High quality zinc alloy case Brass turnknobs and cylinder escutcheons Zinc die cast lever and escutcheon Backset23mm and 30mm. BoltBolts are 28mm sintered stainless steel, are hooked to suit sliding and swing applications and is chamfered for self-latching. Door ThicknessSuits hollow stile door sections with 28mm internal thickness and 58mm maximum external thickness. Timber Doors: 32 to 58mm. Cylinder 5 pin tumbler mechanism Brass cylinders and brass barrels StrikesLatching strike for sliding doors and non latching security strike for swing doors to protect against jemmying. Standard Finish Satin Chrome Brushed SC Other finishes available on application. Keying Standard Keying Supplied individually keyed with two keys per lock 78,000 key combinations Key blank KB2015P Restricted Special Keying Lockwood locks can be keyed to a number of controlled and/or specially keyed systems. These range from legally protected keys to protect against unauthorised duplication, which can also include specially designed key systems such as master key systems, which allow for different levels of mechanical access control. Close Downloads 3541-Step-240415.zip (.zip, 1.7 MB) Installation Instruction - 3540 Fabricator Fitting.pdf (.pdf, 1.2 MB) Installation Instruction - 3640 Metal Door Fitting.pdf (.pdf, 1.7 MB) Installation Instruction - 3740 Timber Door Fitting.pdf (.pdf, 774 kB) Lockwood Synergy Mortice Locks Catalogue.pdf (.pdf, 5.8 MB) Synergy 3540 DXF Drawing.zip (.zip, 230 kB) Synergy 3540 Latching Strike DXF Routing Detail.zip (.zip, 9 kB) Close Where to buy? Find your local Lockwood stockist. Lockwood Synergy® 3578 Hold Back Deadlatches60mm, 89mm or 127mm backset models available. Lockwood Synergy® 3540 Short Backset Mortice Deadlock23mm backset models available. Lockwood Synergy® 3572 Vestibule Mortice LocksAvailable in 60mm, 89mm or 127mm backset.