what is spring cush

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The part number for the Spring Cush block assembly is: model number-3080. EXAMPLE: 4110-3080
The 1460 Regular Arm part numbers are: Regular Arm -- 1460-3077 or 1460-3077L for long arm (must specify finish). Regular Arm with PA -- 1460-3077PA (must specify finish). Regular Hold Open Ar...
The 4110 hold open spring Cush (Spring H Cush) arm part number is 4110-3049SCNS.
SHCUSH,
SCUSH,
A 4110 with AVB (advance variable back check) would be recommended. Using a SCUSH (Spring Cush) arm will also help minimize shock to all door hardware.
The hold open position on a "REG" or "EDA"  hold open arm is set with the door to a few degrees shy of the desired hold open point. To properly set, open the door 5° less then the desired hold open...
EDA ARM - The EDA arm is a heavy duty parallel arm mount.  The degree of door opening is determined by the template used for mounting. EDA arm closers can only be mounted as a Push Side parallel ar...