S. Parker 2600 series mortise locksets give fine security with deadbolt latches, with handed styles for doors at least 1 3/8" thick. Backset is 2 1/2". The mortise locksets come with a solid brass 5/8" x 7/8" latch bolt that has a full 1/2" throw. The solid brass 13/16" x 9/16" deadbolt has a stout 1" throw. Solid brass knobs are 2 1/4" in diameter The lock uses a Segal Keyway, with Keyway C, with a latch face plate 1" x 7 5/8".

The latch face plate is 1" x 7 1/8". The NB model is a vestibule lockset and has no buttons. Available in two finishes, polished brass and dull chrome.

Inside Mortise Locksets

S. Parker inside mortise locksets are excellent for renovation and remodeling work, with a 2 3/8" backset, and a deadbolt that is 7/8" x 5/16" using a 1/2" throw. The face plate is 7/8" x 5 1/2" and the strike is 7/8" x 3 7/8". It is available as the 36000 as a standard interior lockset, and as the 36001 as a bathroom lockset with a turn knob on the nside, and an emergency release on the outside.
Both versions have two 2 1/4" x 7 1/16" plates, 21/8" diameter knobs, and 2 bit keys, and are available in polished brass.