Accentra (Yale) 197-1/4 Series Jimmy-proof Deadlock

The Accentra (Yale) 197-1/4 is a jimmy-proof deadlock for inswinging doors, also referenced as the Yale 197 or 197/14. The case is zinc alloy in a sprayed brass finish with a 2-3/8-inch backset. The outside is furnished with a 5-pin rim cylinder (Yale 1109E). The inside uses a fixed 3-pin brass cylinder with no alternatives available. The deadlock installs on doors from 1-1/4 inches to 2-1/4 inches thick. Two keys (RB8) are included. For outswinging doors, the 197-1/4F model with flat strike is the correct version. SKU: 197-1/4.

What a jimmy-proof deadlock is and why it is specified on inswinging doors

A jimmy-proof deadlock is a vertical bolt deadlock that uses interlocking staple bolts rather than a horizontal bolt throw. When the deadlock is engaged, two vertical bolts drop into a strike mounted on the door frame. The interlocking geometry of the bolts and the strike prevents the lock from being spread, pried, or slid open by forcing a tool between the door edge and the frame, which is the standard attack method against conventional horizontal deadbolts on surface-mounted rim installations.

The jimmy-proof design is used on inswinging doors where the door frame is accessible from the exterior and where pry or spread attacks on a standard rim lock are a realistic threat. The vertical bolt engagement direction also resists the levering technique of applying upward or downward force between the door and frame to disengage a standard horizontal bolt. The 197-1/4 is the inswinging door version. For outswinging doors, the 197-1/4F with a flat strike is the correct model. For the full range of auxiliary deadbolts including other rim configurations, the auxiliary deadbolts section covers the available options.

How the outside rim cylinder and inside fixed cylinder work on the Yale 197-1/4

The 197-1/4 is a double cylinder deadlock: both the exterior and the interior operate by key. The outside uses a Yale 1109E, which is the 5-pin version of the Yale 1109 rim cylinder. Turning the outside key engages or disengages the deadbolt from the exterior. The inside uses a fixed 3-pin brass cylinder with no alternatives available for substitution. Turning the inside key engages or disengages the deadbolt from the interior. Neither side has a thumbturn.

The double cylinder configuration is appropriate for this lock type because the 197-1/4 is a surface-mounted rim installation on a door where a thumbturn could potentially be accessible through a glass panel or adjacent window. Key control from both sides eliminates that vulnerability. Confirm that the applicable fire and building code at the installation location permits a double cylinder configuration before ordering. For key cylinders and key blanks compatible with the Yale 1109E rim cylinder, the cylinders, cores, and keys section covers the available options.

Material, backset, and door thickness specifications for the 197-1/4

The 197-1/4 case is zinc alloy, which is the standard cast material for this lock type and provides a structural housing for the vertical bolt mechanism, both cylinder bores, and the mounting hardware. The case finish is sprayed brass and is the only available finish for this model. The backset is 2-3/8 inches. Door thickness compatibility runs from 1-1/4 inches to 2-1/4 inches, which covers a wider range than most bored cylindrical locks and accommodates thin residential door stock, standard hollow metal commercial doors, and heavier solid core commercial doors within a single model.

Two keys cut to the RB8 key blank are included. For the complete range of cylindrical and auxiliary deadbolts across all configurations, the cylindrical deadbolts catalog is available. For the full Accentra and Yale commercial lock range at American Locksets, browse the commercial locks section.

Confirm the door swings inward before ordering. For outswinging doors, order the 197-1/4F. Sprayed brass finish only. Two keys included.