Designed and constructed with high quality components to provide maximum security. The Sargent electrified 8270 series locks represent over a century of innovation and experience in manufacturing hardware and are the industry?s benchmark for mortise locks: Strong - Durable - Flexible ? Innovative and Secure.For Doors 1-3?4" (44mm) thick standard. For doors over 1-3?4" (44mm), specify door thickness and panels (if any)Backset 2-3?4" (70mm) onlyCase 12 gauge heavy duty wrought steel, zinc dichromate plated. Thickness 7/64" (3mm) (.109")Outside Front Plate Brass, bronze or stainless steel. 8" (203mm) x 1-1?4" (31mm), ANSI Standard A115.1. Adjustable at any angle from flat to beveled 1?8" (3mm) in 2" (51mm)Springs High carbon steelHubs for Knobs Sintered iron copper infiltratedHubs for Levers Cold forged steelHubs for Institutional Stainless steel (3- prefix)Latchbolt Stainless steel 3?4" (19mm) projection one-piece, anti-friction reversible latchAuxiliary Deadlatch Stainless steel, non-handedDeadbolt One-piece hardened stainless steel, with 1" (25mm) projectionHand Specify hand on order; easily field reversible (if no hand is specified RH will be provided)Strike Brass, bronze or stainless steel; ANSI Standard A115.1; curved lip, non-handed (strike box optional)Keys Two, nickel silver (control key or emergency key must be ordered when required)Cylinder Brass, size #41 (1-1/8") standard (except for Freewheeling, size #46 (1-3/4")). Available with SARGENT Signature, V-10, XC and KESO Security SystemsMasterkeying Can be masterkeyed or grand masterkeyed. Construction keying available. LA standard keyway.Finishes 3, 4, 9, 10, 10B, 10BL,15, 20D, 26, 26D, 32, 32D Special finishes are available. (Contact factory for details)Classroom Security 38, 39, 40, 41 Functions (All mortise trim designs available except KE/LE 3 & 4 and PT trim or FE trim with 41 function)Stile 4-1/2" (114mm) minimum stile for 7800/8200, 4-3/4" (121mm) minimum stile for electrical function locksDoor Prep ANSI A115.1 modified per template (see template for 7800/8200 lockbody & trim)