The pair have already had brief spells at Croft Park this season, with Langstaff featuring seven times for the Spartans at the beginning of the campaign and Green impressing between December and January, scoring against Spennymoor Town on Boxing Day.
Twenty-year-old Green was recalled by the Heed last month before quickly making his first start of the season in a 2-0 defeat against Sutton United.
Since his loan spell at Blyth back in August, Langstaff (pictured) has made two substitute appearances for the Tynesiders and has also spent time on loan at Ebac Northern League First Division side Marske United this season.
Now the 21-year-old forward, along with Green, will make the temporary switch north to Northumberland to help boost Spartans` play-off push.
(Photo: Dan Cooke)