Accentra D142 Blank Plate x Thumbturn Deadbolt, 2 3/4" Backset

The Accentra D142 is a Grade 1 blank plate x thumbturn deadbolt with a 2-3/4-inch backset, certified to ANSI/BHMA A156.5 and carrying ANSI function number E01111. The exterior face has a blank plate with no key cylinder. The interior face operates the deadbolt bolt by thumbturn. 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 D142 is non-handed and field reversible, covering door thickness from 1-3/8 inches to 1-3/4 inches. Multiple finishes available. SKU: D142.

Why the 2-3/4-inch backset is the standard commercial specification for the D142

The D142 uses a 2-3/4-inch backset, the distance from the door edge to the center of the bored hole. This is the standard commercial backset dimension used on the vast majority of commercial hollow metal doors, solid wood entry doors, and institutional door assemblies. When a hardware schedule specifies a deadbolt without calling out a specific backset, the 2-3/4-inch dimension is the default assumption in most commercial construction and renovation projects.

The 2-3/8-inch backset is the alternative dimension and applies to narrow-stile aluminum frame doors, some storefront applications, and door preps where the 2-3/4-inch distance would place the bolt outside the door panel edge. If the door prep is an existing installation, measure the distance from the edge of the door to the center of the existing bore hole before ordering to confirm the correct backset. For the same blank plate x thumbturn configuration in the 2-3/8-inch backset version, the Accentra D141 blank plate x thumbturn deadbolt is the correct specification.

Where a blank plate x thumbturn deadbolt fits in a complete door hardware specification

The D142 is an auxiliary deadbolt, meaning it provides a separate bolt throw independent of the primary lockset on the same door. On a door that already has a cylindrical or mortise lockset handling the primary latching and locking function, the D142 adds a secondary bolt that the interior occupant controls with the thumbturn. The exterior blank plate means no key cylinder is present on the outside, so the secondary bolt can only be engaged or released from inside.

This configuration typically appears alongside an electronic access control system that handles exterior entry, a panic device that handles interior egress on a fire-rated assembly, or as an additional interior security bolt on a door that already has a primary key-operated lockset. For Accentra lever locks and other primary locksets that pair with the D142 on a complete door opening, the Accentra lever locks catalog is available for reference. For the full range of auxiliary deadbolt configurations, the auxiliary deadbolts section covers the options.

ANSI function E01111 and Grade 1 certification on the D142

ANSI function number E01111 is the standardized designation for a blank exterior x thumbturn interior deadbolt under ANSI/BHMA A156.5. This number appears on hardware schedules and specification documents and allows architects, specifiers, and contractors to identify the correct product without referencing a brand name. The D142 is the Accentra product that satisfies E01111 at the 2-3/4-inch backset dimension.

ANSI/BHMA A156.5 Grade 1 is the highest performance tier for auxiliary deadbolts. The D142 passes Grade 1 requirements covering bolt throw strength, thumbturn mechanism endurance, and bolt projection consistency. For the cylinder x thumbturn version in the same backset if keyed exterior access is also required, the Accentra D112 cylinder x thumbturn deadbolt is stocked. For the complete range of cylindrical deadbolts across all configurations, browse the cylindrical deadbolts catalog.

Confirm the backset dimension matches the door prep before ordering. Multiple finishes are available. The D142 is non-handed and field reversible.