Military surplus Loop Clamp with aluminum alloy band and rubber cushion.  The following are the military specs for NSN # 5340-00-664-2370. 
The P/N is "MS21919DC36".

The item is new but removed from original packaging and is classified as "new old stock".  See pictures.

You wil receive the actual number listed in the drop down box.above of the loop clamps described..




OVERALL WIDTH0.656 INCHES NOMINAL
DIAMETER0.204 INCHES NOMINAL
MATERIAL THICKNESS0.046 INCHES MINIMUM AND 0.054 INCHES MAXIMUM
CENTER TO CENTER DISTANCE BETWEEN LOOP AND MOUNTING HOLE1.548 INCHES NOMINAL
DISTANCE FROM LOOP CENTER TO TONGUE END1.766 INCHES NOMINAL
LOOP INSIDE DIAMETER2.235 INCHES MINIMUM AND 2.265 INCHES MAXIMUM
MATERIALALUMINUM ALLOY BAND
MATERIALRUBBER CUSHION
STYLE DESIGNATOROFFSET MOUNT
NONDEFINITIVE SPEC/STD DATA4 TYPE AND A CLASS