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Best 9K Series Grade 1 Lever Locksets

Certifications–
- UL Listed: Listed by Underwriter's Laboratories for use on 3 Hr, A label single swinging doors (4'x10'). GYJT Builders Hardware-single point locks or latches.
- American National Standard: ANSI A156.2, Series 4000 Grade 1 (formerly FF-H-106C Series 161.).
Backset– 2 3/4" standard
Chassis– Critical latch and chassis components are brass or corrosion-treated steel. 2 1/16" diameter to fit 2 1/8" hole in door (Conforms to ANSI A115.2).
Door thickness– Available for 1 3/4"
Latch– Solid brass 9/16" throw. Front 2 1/4" x 1 1/8" beveled.
Lever handles– Lever handles are a high-quality zinc alloy. Trim components are brass or bronze.Body is approximately 1 5/8" in diameter; Handle is approximately 4 3/4" long (from center-line of chassis).
Mounting– In addition to standard door preparation (ANSI A115.2 for 1 3/4" doors), two additional holes are needed for through-bolts. Through-bolts require two 5/16" diameter holes located at 12 o'clock and 6 o'clock positions. A drill jig is provided to insure accuracy of the holes.
Projection on door– Approximately 2 3/4" when mounted on 1 3/4" door.
Roses– 3" Convex - no ring
Strike– STK: Conforms to ANSI A115.2 (2 3/4" x 1 1/8" with curved lip & box). S3: Conforms to ANSI A115.2 for 1 3/4" doors (4 7/8" x 1 1/4" with curved lip).S3-7/8: Conforms to ANSI A115.2 for 1 3/4" doors (4 7/8" x 1 7/8" flat)