I found the information...pasting below:
Register of Federal United States Military Records, Vol 1, 973M2de, p.8 (Sc-Si) refers to Film roll 882886, Card #2420 "Schreckengast, John, 3 Battalion, (Northumberland County Militia) Pennsylvania, Revolutionary War, Private"
Revolutionary War 1773-1783, Index to Service Records, 973M22za, p.173, Pennsylvania 3d Battalion (Northumberland County Militia) refers to Film roll 1486078, "3 Battalion (Northumberland County Militia) Pa. John Schrekengast Appears with the rank of Pvt on a Muster Roll of Capt. John Moll's Co, belonging to the 3rd Battalion of Northumberland County Militia, Commanded by Col. Peter Hosterman in the actual service of the United States of America. Entered the 18th April (1779) and discharged the 3rd May, and entered again the 27th July and discharged the 9th August 1779."