Arrow Lock BM20-LB Entrance Mortise Lock

Arrow Lock BM20-LB Mortise Lock - Entrance is engineered for exceptional strength and performance, making it an ideal choice for high-traffic areas in schools, hospitals, and commercial buildings. This heavy-duty lock is designed to provide robust security while ensuring low maintenance over time. The BM20-LB features a field-reversible handing, allowing easy re-handing without disassembling the lock case. It accommodates standard door thicknesses of 1-3/4" and offers a backset of 2-3/4". Constructed from heavy gauge steel with a corrosion-resistant zinc dichromate finish, the lockcase measures 5-7/8" x 4" x 15/16". Its armored front and wrought brass or bronze faceplate enhance durability and security. Equipped with a stainless steel latchbolt and deadbolt, the BM20-LB offers both a 5/8" throw and a one-piece deadbolt with a throw of 19/32". Keying features include master keying options, high-security cylinders, and interchangeable cores. A five-year limited warranty further underscores the lock’s reliability. With its ANSI F20 entry/office function, this mortise lock ensures secure access while providing peace of mind, making it a valuable addition to any building’s security system.

Mortise Lock - Entrance

Lock Body, BM20

The BM Series are engineered for strength and performance, and precisely manufactured to exact standards.

Arrow BM Series Lever Mortise Locks are intended for heavy duty use in schools, hospitals and commercial buildings where security, durability and low maintenance are required.

• Handing: Handed; field reversible. The lockset can be re-handed without disassembling the lock case.
• Door Thickness: 1-3/4" (4mm) standard. Optional door thickness available; consult factory.
• Backset: 2-3/4" (70mm).
• Lockcase: Heavy gauge steel, with zinc dichromate finish for corrosion resistance. 5-7/8" (149mm) x 4" (102mm) x 15/16" (24mm).
• Armored Front: Heavy gauge steel, 8" (203 mm) x 1-1/4" (32mm) x 3/32" (2mm). Accommodates flat doors and doors beveled 1/8" (3mm) in 2" (51mm).
• Faceplate: Wrought brass or bronze, attached by machine screws to lockcase front.
• Latchbolt: Stainless steel, 2 piece mechanical with anti-friction insert. 5/8" (16mm) x 1" (25mm) x 3/4" (19mm) throw.
• Auxiliary Latchbolt: 9/16" (14mm) effective throw and 3/8" (10mm) effective auxiliary latch deadlocking.
• Deadbolt: One-piece stainless steel, 19/32" (15mm) x 1 1/4" (32mm) x 1" (25mm) throw.
• Hub: Lever: nickel steel, 5/16" (8mm).
• Spacing: Center to center, hub to cylinder: 3-5/8" (92mm).
• Center to center, hub to turnpiece: 2-7/16" (62 mm).
• Strike: Wrought brass or bronze, ANSI straight lip standard, 4-7/8" (124mm) x 1-1/4" (32mm) 1-1/8" (29mm) lip to center. Optional strikes, lip lengths and ANSI wrought strike box available.
• Keys: Two nickel silver standard.
• Keying Features Available:
  • Master keying
  • Construction master keying
  • Visual key control
  • Concealed key control
  • High security cylinder
  • Interchangeable core (IC) - Pointe, Pointe Flex
• Warranty: Five-year limited.

Resources

• AM Series / BM Series Cut Sheet
• AM/BM Series Mortise Lock Catalog
• BM Series Mortise Locks Cut Sheet