Model: Grad 1
Lock Chassis:
Cold rolled steel with zinc dichromate finish for corrosion resistance. Latch retractor is precision zinc die cast. Requires standard 2-1/8' (53.97 mm) bore through door.
OverDrive™:
Freewheeling lever action occurs when latch retraction mechanism disengages from lever handle when handle is locked. Built-in stops in the rose insert prevent lever
from traveling beyond approximately 57 degrees. Additional 40% spring power in rose insert on OverDrive™ side of door ensures that lever handle returns to horizontal position. (Optional)
Backset:
2-3/4' (69.85 mm) backset standard, 3-3/4' (95.25 mm) available. Also available with 5' (127 mm) backset when used in conjunction with H series latch.
Door Thickness:
1-3/4' (44.45 mm) standard. Available 1-3/8' (34.92) special order.
Latch:
Brass with 1/2' (12.7 mm) throw. 3/4' (19.05 mm) firelatch available for pairs of doors. Latch housing is steel, zinc dichromate finish for corrosion resistance. 1' (25.4 mm) diameter bore in edge of door required.
Latch front:
Brass, bronze, or stainless steel. 2-1/4' (17.11 mm) x 1-1/8' (28.57 mm), beveled 1/8' (3.175 mm) in 2' (50.80 mm).
Strike:
Brass, bronze or stainless steel. ANSI A115.2, 4-7/8' (123.82 mm) x 1-1/4' (31.75 mm) curved lip or 2-3/4' (69.85 mm) x 1-1/8' (28.57 mm) “T” strike standard. All strikes have 1-1/4' (31.75 mm) lip to center dimension. Box strikes available.
Handing: Non handed.
Mounting:
Thru-bolts within 2-1/8' (53.97 mm) cross bore. Contains two support plates, which secure to face of door as well as accept thru-bolts from inside rose assembly.
Cylinder, Standard:
Solid brass, 6 pin cylinder with Arrow “A” keyway. Can be masterkeyed, grandmaster keyed and construction masterkeyed. Conventional cylinders are also available in a variety of competitive manufacturer's keyways. Supplied with two 6 pin nickel silver keys.
Cylinder Options:
Interchangeable core-lockset prepared for use with 6 or 7 pin interchangeable cores. Supplied less core, but packed with 6 and 7 pin tailpieces. Will accept cores as manufactured by Best™, Falcon™ and other similar style cores. Suffix “IC” to design. High Security-For cylinders meeting UL437 for pick and drill resistance.
Finish:
US3, US4, US10, US10B, US26, US26D.
