622 North Central St. Knoxville, TN 37917
Phone:(865) 522-0841 Fax: (865) 637-2359

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LSDA Grade 1 Extra Heavy Duty Commercial LF Series
Applications- Extra heavy duty commercial buildings such as schools, hospitals, factories and other public buildings.

15 Year Mechanical Warranty
1 Year Finish Warranty
No Lever sag after 1,000,000 cycles



Complies with ANSI/BHMA A156.2, Series 4000 Grade 1
UL Listed for "A" Label (3 hr) single swing doors (4' X 8')
Door Thickness 1-3/8" to 2" wood or metal door. 2-1/4" is available on request
Door Preparation ANSI 115.2 through-bolted installation
Backset 2-3/4" Standard - 2-3/8", 3-3/4" & 5" optional
Handing Non-Handed
Strike ANSI 4-7/8" X 1-1/4" full lip standard
Warranty 15 year limited mechanical warranty and 1 year finish warranty from date of purchase
Trim Levers are solid die-cast plated to match finish symbol. Roses are extra-heavy duty wrought brass.
Construction Cast and machined stainless steel hubs with heat-treated heavy gauge cold-rolled steel spindles.


  • Heavy-duty springs cycle tested 1,000,000 times with NO lever sag
  • Heat-treated heavy-gauge cold rolled steel spindles which withstand 1000 inch pounds of torque
  • Levers are designed to comply with barrier free accessibility codes

Click here to view LX Series Heavy Duty Commercial Grade 1 Leverset.

Grade 1 Leversets Grade 1 Knobsets Grade 2 Knobsets Grade 2 Leversets
Grade 2 Deadbolts Grade 3 Locksets Grade 3 Leversets Grade 3 Handlesets
Grade 3 Deadbolts Rim and Vertical Rod/Exit Devices and Trip Surface Rim and Vertical Rod/Exit Devices Grade 1 Door Closers
Grade 2 Door Closers Economy Door Closers Pin Tumbler Brass Padlocks Pin Tumbler Laminated Padlocks
Commercial Rekeyable Solid Brass Padlocks Weather Resistant Padlocks Solid Body Padlocks

Specialty and Combination padlocks

Mortise- Thumb turn- Dummy Cylinders Rim- Key-in-knob & Lever- Deadbolt Cylinders Neuter Bow & Look a Like Key Blanks

Brass Key Blanks

Cam Locks

Utility Locks

Fire Resistant Home Safes


American Padlock | Medeco Locks | Von Duprin Locks


American Padlock | Medeco Locks | Von Duprin Locks