Established in 1937, Hartzell Machine Works is an Upper Chichester, Pennsylvania shop known for custom precision machining and a distinctive earlier role as the only U.S. supplier of Monotype typesetting molds for many years. Today, it makes close-tolerance parts for demanding customers, including Boeing and the Defense Logistics Agency, under an AS9100D-certified quality system.
AS 9100D
certification
ISO 9001:2015
certification
AWS D17.1:2001
certification