After selling their original allocation of 3700, the Blades have been offered an additional 500 tickets for League One opener.
General view inside the stadium before the game
There is a growing sense of optimism at Brammall. After narrowly missing out on the League One play-offs last season, Sheffield lad and ex-player Chris Wilder was brought in to replace Nigel Adkins.
Wilder joined off the back of an impressive season in charge of Oxford City, steering them to automatic promotion from League Two, and a Wembley appearance in the Johnstone's Paint Trophy final defeat to Barnsley.
The 48-year-old quickly stamped his mark on the Blades with a number of signings, including his captain at The Kassam, Jake Wright, Coventry midfielder John Fleck and ex-Sheffield Wednesday striker Leon Clarke.
General view of Bramall Lane stadium
With centre-backs Jack O'Connell and James Wilson joining, along with experienced players Chris Hussey and Mark Duffy, Wilder is beginning to assemble a squad capable of a return to the Championship.
This weekend, United travel to the Macron Stadium, the home of recently relegated Bolton Wanderers in their opening game of the League One season.
And with Blades supporters becoming increasingly confident of a return to the second-tier, they have shown their loyal support by snapping up their original allocation of 3,784 away tickets.
If that wasn't enough, United have announced that a further 500 tickets will be made available for Saturday's tie after Bolton were unable to sell a vast amount of their own allocation.
General view of the stadium / clock on the stand
A statement on the club's website read: "After talks with Bolton we have now secured another 500 tickets, this will be our final allocation.
"These will be on sale from 9am Thursday morning (4th August)."
Tickets will be available on a first-come, first-serve basis at Brammall Lane or by phoning 0114 253 7200.
Any unlucky supported that are unable to secure a ticket have been advised not to travel to Bolton on Saturday, where the atmosphere is likely to have a home feeling to it rather than an away.