The 27-year-old, who signed for The Shots from Crawley Town in August, joins Kodi Lyons-Foster at The Enclosed Ground.
Arthur started his career with Queens Park Rangers and since leaving Loftus Road, has taken in spells with Bishop`s Stortford, Rotherham, Havant & Waterloovile, Northampton Town, AFC Wimbledon and Woking, joining Crawley in the summer of 2016.
Arthur has made thirteen appearances for The Shots and will be available for The Hawks’ next four fixtures.