Part Number: 1391-638 (Seal) Part Number: 1391639 (No description) Part Number: 139164 (Ring) Part Number: 1391-640 (Seal) Part Number: 1391640000 (Weidmuller) Part Number: 139164-001 (No description) Part Number: 139164-01 (Synchro-kl) Part Number: 1391-646 (Seal) Part Number: 1391-648 (Seal) Part Number: 13916494 (New in stock) Part Number: 139164Y1 (Bushing) Part Number: 139164Y2 (Bearing) Part Number: 139164Y3 (Bushing) Part Number: 139165 (Seal)