United shared the spoils with the Spireites at St George's Park Graves courtesy of Armond's strike.
It was the fourth meeting of the season between the sides - with United garnering four league points out of six, alongside FA Youth Cup progress and an Academy Cup exit.
Boston (3-4-2-1): Charlie Wilkinson; Sam Harris, Owen Sheriff, Taylor Jaine; Krisztian Gagyi, Mackenzie Burdass, Joe Melson, Zane Millar; Finlay Armond, Logan Tate; Elliot Foster. Subs (used): Han Stevens, Jake Henderson; (unused): Ben Johnson.
Referee: Bruce Baskerville.
PIC: David Dales.