ABINGTON — Abington’s outgoing town manager is threatening to sue the town, saying the Board of Selectmen is trying to avoid giving him the severance pay stipulated in his employment contract.

John D’Agostino, whose contract expires on April 23, contends the board is citing “nonfeasance” as the reason for not paying him severance — specifically that he “couldn’t get along with the people on boards and committees” — an assertion he disputes.