NSN 7R-6675-017171261-SX, REF NR 576861-ASSY, QTY 22 EA, DELIVERY FOB ORIGIN. The rights to use the data needed to purchase/repair this part from additional source(s) are not owned by the Government a... NSN 7R-6675-017171261-SX, REF NR 576861-ASSY, QTY 22 EA, DELIVERY FOB ORIGIN. The rights to use the data needed to purchase/repair this part from additional source(s) are not owned by the Government and cannot be purchased, developed, or otherwise obtained. It is uneconomical to reverse engineer this part.