Answer: hashmarks

AnswerCrossword Clue
HASHMARKSService stripes, informally
HASHMARKSBreakfast-plate stains
HASHMARKSSoldier's service stripes
HASHMARKSService stripes
HASHMARKSThey appear at one-yard intervals
hashmarksHASHMARK, a proofreading symbol #