Both striker Walsh and centre-back Eastham agreed one-month loan deals from Dagenham & Redbridge and Blackpool respectively on Thursday afternoon and go straight into Mark Yates` squad for the Sixfields clash.
Eastham`s arrival coincides with the loss of central defender Martin Riley for three to four weeks with the hamstring injury he sustained during Monday`s 2-1 win at Southend.
Eastham will now compete with Andy Gallinagh to line up alongside Steve Elliott at the heart of Town`s defence.
Winger Josh Low (hamstring) has been missing for three-and-a-half weeks and is rated as 50/50, with a fitness test likely to decide his involvement this weekend.
Source: PA
Source: PA