East will be assisted by H Lennard and M Wilkes, with the fourth official being D McDermid. There will also be a reserve assistant referee for the showpiece final, and M Scholes will undertake that role.
United have been officiated by Mr East before this season, in their 2:0 away win at Bournemouth, where own goals from Adam Barrett and Steve Cook awarded the Blades a victory.
East showed six yellow cards in that game; three to each side. He has also officiated one Huddersfield game this season, and that was their 2:0 loss in the capital to eventual champions Charlton Athletic.