Arrow Lock BM21-LB Mortise Lock for Front Door

Arrow BM21-LB Mortise Lock - Front Door offers exceptional durability and security, designed specifically for high-traffic environments such as schools, hospitals, and commercial buildings. This heavy-duty lock is crafted from heavy gauge steel, featuring a zinc dichromate finish that ensures long-lasting corrosion resistance. The lockset is handed yet field reversible, allowing for easy re-handing without disassembly. Engineered to accommodate standard door thicknesses of 1-3/4" (4mm) with an optional thickness available, the BM21-LB boasts a backset of 2-3/4" (70mm). Its robust construction includes a stainless steel latchbolt with a two-piece design, ensuring reliable operation with an anti-friction insert. The deadbolt provides added security with a one-piece stainless steel construction and a substantial 1" throw. Keying options are extensive, including master keying and high-security cylinders, providing flexibility for various needs. Additionally, the lockset comes standard with two nickel silver keys. With a five-year limited warranty, the Arrow BM21-LB Mortise Lock delivers peace of mind and reliability, making it the ideal choice for those who prioritize strength and low maintenance in their door hardware solutions.

Mortise Lock - Front Door

Lock Body, BM21, 34

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