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

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

15 Year Mechanical Warranty
1 Year Finish Warranty


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.
Latchbolt Solid brass 1/2" throw adjustable front for flat or beveled doors. 2-1/4" X 1-1/8" faceplate
Backset 2-3/4" Standard - 2-3/8" 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 Knobs and roses are stainless steel, brass or bronze
Construction Corrosion treated, heavy-gauge, cold rolled steel mechanisms.


  • 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


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