Accentra D112 Cylinder x Thumbturn Deadbolt, 2 3/4" Backset

The Accentra D112 is a Grade 1 cylinder x thumbturn deadbolt with a 2-3/4-inch backset, certified to ANSI/BHMA A156.5. The deadbolt operates by key from the outside and thumbturn from the inside, the standard configuration for residential and light commercial entry doors where keyed exterior access and tool-free interior egress are both required. It installs on doors prepared to ANSI/BHMA A156.115 specifications using a standard bored-hole installation on square or beveled doors opening in or out. The D112 is non-handed and field reversible. Multiple finish options are available. SKU: D112.

What cylinder x thumbturn means on a deadbolt and when to specify it

A cylinder x thumbturn deadbolt, sometimes described as a double-sided thumbturn deadbolt or single-cylinder deadbolt, has a key cylinder on the exterior face and a thumbturn on the interior face. This is the most widely specified deadbolt configuration for entry doors where the occupant needs to unlock and exit without locating a key, while exterior entry still requires a key. The thumbturn allows the bolt to be thrown from inside with a simple turn of the thumb, making it the correct specification for fire egress doors, ADA-accessible entry points, and any door where immediate egress from the interior is a design requirement.

The alternative is a cylinder x cylinder deadbolt, which requires a key from both sides. That configuration is appropriate on glass-panel doors where a thumbturn could be reached by breaking the glass, but it is not appropriate for most commercial or residential entry applications where interior egress must be immediate and tool-free. For the full range of cylindrical deadbolts in multiple configurations, browse the cylindrical deadbolts catalog. For mortise deadbolt options, mortise deadbolts covers the available range.

What ANSI/BHMA A156.5 Grade 1 certification means for this deadbolt

ANSI/BHMA A156.5 is the US standard governing the performance of auxiliary deadbolts. Grade 1 is the highest of three grades and requires the deadbolt to pass a test sequence covering bolt throw strength, cylinder pull resistance, operation cycle endurance, and bolt projection consistency. A Grade 1 deadbolt is the correct specification for commercial entry doors, multifamily building entries, institutional applications, and any residential door where security performance above the minimum is required.

The D112 is certified to Grade 1 across the full test sequence, not just selected categories. Specifying a Grade 1 deadbolt alongside a Grade 1 cylindrical lockset provides a consistent security rating across the door opening hardware set. For Accentra lever locks and other hardware that pairs with the D112 on a complete door opening, browse the Accentra lever locks catalog.

Installation requirements: backset, door thickness, and prep for the D112

The D112 specifies a 2-3/4-inch backset, which is the distance from the edge of the door to the center of the bored hole. This is the standard commercial backset used on most interior and exterior commercial doors. A 2-3/8-inch backset version is also available in the D series for doors that require the shorter backset dimension. Confirm the existing door prep backset before ordering to ensure the correct version is selected.

The D112 installs on doors from 1-3/8 inches to 1-3/4 inches thick, covering the full range of standard hollow metal and solid wood commercial door thicknesses. The lock is non-handed and the bolt direction is field reversible, so a single SKU covers both inswing and outswing doors as well as left-hand and right-hand door swings without requiring a separate order for each configuration. For key cylinders and key blanks compatible with the Accentra cylinder on this deadbolt, the cylinders, cores, and keys section covers the available options. For the broader Accentra and commercial lock catalog, browse the commercial locks section.

Confirm the backset dimension matches the door prep before ordering. Multiple finishes are available. The D112 is non-handed and field reversible.