Marks Hardware 5A/3LH-B4 Entry Mortise Body Only LH offers a robust solution for enhancing security in both residential and commercial settings. Designed for use with lever sets, this mortise lock features a 2-3/4 inch backset and is constructed to meet ANSI Grade 1 specifications, ensuring durability and reliability. Its bright brass finish (605/US3) not only adds an element of elegance but also provides corrosion resistance. With a stainless steel bolt that boasts a full 1-inch throw, this lock guarantees superior strength and protection against forced entry. The 3/4-inch anti-friction latch throw and a 1/2-inch auxiliary latch throw further enhance its functionality, making it an ideal choice for high-traffic environments. The lock body is crafted from stamped steel with a zinc dichromate finish, ensuring longevity and resistance to wear. Marks Hardware mortise locks are renowned for their maintenance-free performance, having been engineered to exceed 6 million cycles of continuous use. The 5A/3LH-B4 model is also BHMA certified and comes with a lifetime mechanical warranty, providing peace of mind for users. Whether for office use or residential applications, this mortise lock is a dependable choice that combines security with style.

Entry Mortise Body Only LH, for Lever Sets, 2-3/4in Backset, Deadbolt and Latch, Front 1-1/4 x 8in, Grade 1, 605/US3 Bright Brass

Marks USA has been making mortise locks for over 30 years. From their introduction, our mortise locks have enjoyed a reputation for long life and their ability to excel in high traffic, high abuse areas. Marks USA mortise locks are engineered to provide years of maintenance-free performance. Our Nova series mortise locks exceed 6 million cycles of continuous use.

Features:

• Meets ANSI grade 1 specification: ANSI-A156.13
• Underwriters laboratories 3-hour fire rating
• BHMA Certified
• Lifetime mechanical warranty
• Available in 2-1/2" and 2-3/4" backset
• Stainless steel bolts, latches, independent lever support springs (on lever sets)

Specifications:

• Backset: 5 Series 2-3/4"; 55 series 2-1/2"
• Bolt throw: Stainless steel full 1" throw
• Latch throw: 3/4" (anti-friction)
• Auxiliary latch: 1/2" throw
• Case: Stamped steel 090 thick, zinc dichromate finish
• Front: 1-1/4" x 8", adjustable bevel
• Hubs: Steel, 9/32" on diamond 5/16" on square w/security separator

Keyed Single Cylinder, No Deadbolt Functions:

• D: Office/vestibule
• DW: Vestibule
• E/Q/QH/K: Office, ANSI F04
• EW: Storeroom, ANSI F07
• J: Classroom, ANSI F05
• JM/JR: Hospital (holdback), ANSI F06
• GL: Inst. privacy, ANSI F26
• MT: ArchiTech
• EL: Electrically locked
• EU: Electrically unlocked

Keyed Single Cylinder, with Deadbolt Functions:

• A: Entrance, ANSI F08, F10
• B: Entrance, ANSI F21
• F: Dormitory, ANSI F12
• FS: Dormitory
• FW: Dormitory, ANSI F13
• FD: Apartment, ANSI F20
• H: Hotel, ANSI F15
• LH: Spec. privacy

Keyed Double Cylinder, No Deadbolt Functions:

• G: Entrance, ANSI F09
• GC: Intruder latchbolt, ANSI F32
• GG: Classroom security
• GR: Classroom security w/holdback
• WW: Institution, ANSI F30

Keyed Double Cylinder, with Deadbolt Functions:

• AC: Entrance, ANSI F35
• C: Storeroom, ANSI F14
• FC: Intruder deadbolt, ANSI F34
• FA: Dormitory, ANSI F11
• FX: Dormitory, ANSI F33

Keyless Functions:

• N: Passage
• L: Bathroom, ANSI F02
• LF/LJ: Privacy, ANSI F19
• EX: Exit, ANSI F31

Finishes:

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