Norton HM51 Series 3/4" Offset Hung Floor Closer | Norton Shallow Depth Floor Closer For Hollow Metal Doors
The HM51 is a 3/4" offset-hung, shallow-depth floor closer designed for hollow metal door and frame installation for interior doors weighing up to 250lbs.
APPLICATION
• Interior Doors
• 1-3/4" Hollow Metal Doors & Frames
• Weight to 250 lbs.
• Door Width up to 4'0" (1219mm)
FEATURES
• Single Acting
• Handed
• Designed for stock hollow metal doors and frames with standard weight 4-1/2" hinge preparation
• Three special steel 4-1/2" ball bearing standard weight hinges with 3/4" offset are included. Doors over 90" in height warrant an additional hinge.
• Order spring sizes 3 through 5:
- Model HM5103: 36" (914mm) Door Width
- Model HM5104: 42" (1067mm) Door Width
- Model HM5105: 48" (1219mm) Door Width
• Surface mounted bottom arm with thru bolts
• Available non-hold open (NBC) or automatic hold open (ABC) specify 90° or 105°
• Doors will swing 5° beyond hold open point
• Separate and independent valves for closing speed, latch speed and backcheck
• Available with floor plate or threshold installation (floor plate shown)
• Cycolac, rust proof cement case
• Interchangeable spindle adapters
• Furnished with 1/2 wood and full machine screws
COMPLIANCE
• For fire rated openings (up to 3-hour assemblies), prefix “F”. This package will be supplied with three steel hinges and a non-hold open closer
Norton HM51 Technical Information

- Option:Choose Handing (What is handing? Click link here to know more):
- https://blog.locksandsafes.com/2020/07/28/door-hardware-handing-guide/
- Option:Choose Finish (What is this? Click here to see our detailed Door Hardware Finish Guide):
- https://blog.locksandsafes.com/2020/07/28/lock-and-door-hardware-finishes/