Two or more different types of items, having a common mounting or mounted on each other, which together form a portion of a calibrator, but which in itself is not a complete functioning item and cannot be assigned a more definite item name.
Classification: Parts and accessories of articles of schedule b subheading 9030.39
NSN 5998-01-221-1970
NSN 5999-01-076-5352
NSN 5930-01-553-8749
NSN 5835-00-472-6560
NSN 5895-01-426-8942
NSN 5835-01-440-5391
NSN 7035-00-991-6877
NSN 5950-01-446-2984
NSN 4140-00-878-9880
NSN 6320-01-177-3192
NSN 5985-01-056-7721
NSN 5985-01-182-7437