Marks Hardware

Cylindrical locksets are designed for use in situations where durability is the deciding factor. Our cylindrical lock chassis are all constructed with cast retractors on bronze roller bearings. This strong, durable component gives our cylindrical sets the ability to last millions of cycles and is available in knob and lever sets. The Survivor leverset has a unique "clutch" mechanism that radically reduces the wear and abuse that typical cylindrical lever sets endure. When locked, the levers of the Survivor disengage from the retractor and other interior mechanisms of the lock. The levers of the Survivor swing freely, without resistance. This reduces the amount of wear on lock components and eliminates "lever droop". The use of a clutch results in longer lasting, lower maintenance, eloquent solution.

Features:

• High quality, longer lasting, lower maintenance design
• Competitively-priced for exceptional value
• Exceeds BHMA grade 1 spec by 300%, over 3.6 million cycles
• Unique stainless steel "clutch" and bronze bearings dramatically reduce wear and abuse & eliminates lever droop
• Marks Lifetime Mechanical Warranty
• 3-Hour Fire Rated; 2-3/8" and 2-3/4 Backsets

Specifications:

• Backset: 2-3/4”
• Latch #1834, Front: 1-1/8” x 2-1/4”; Throw: 9/16”; stainless steel nose
• Levers: Solid cast zamac; w/ 1/2” return (except 395 & 495)
• Roses: Thru-bolted, 3-7/16” dia, spring loaded 2-#10 thru-bolts
• Strike: #1135, 4-7/8” ASA curved lip strike
• Door Thickness: 1-5/8” to 1-7/8”; For 1-3/8” door use K1904 spacer
• Cylinder: Marks “C” keyway, 6 pin w/ 2 keys

Functions:

• N: Passage
• L: Privacy
• P: Patio
• DC: Communicating
• AB: Entry
• AQ: Exit
• S: Classroom
• F: Storeroom
• DW: Institution
• DA: Vestibule
• T: Corridor
• TO: Time out
• TK: Hospital/privacy
• GB: Store door
• BS: Service station lock
• H : Hotel
• DB: Classroom intruder
• DO: Dummy trim outside
• DT: Full dummy trim
• NB: Communicating passage
• FB: Communicating storeroom
• SB: Communicating classroom
• FEL: Electrically locked
• FEU: Electrically unlocked

Finishes:

• 3 - Bright brass
• 32D - Stainless steel
• 10B - Dark bronze
• 26D - Satin chrome