Rectangular cube with four holes used in the external fixation system
NSN 5895-00-892-1107
NSN 5996-00-983-8667
NSN 6240-01-530-7485
NSN 5965-01-425-5857
NSN 5855-01-020-7982
NSN 5960-00-189-6517
NSN 6110-01-097-6805
NSN 5996-01-478-4937
NSN 6610-00-664-2190
NSN 7035-00-179-3924
NSN 5960-01-498-0572
NSN 6240-00-689-8504